Best Islands to Visit in Maine

Maine’s coast is scattered with islands, but only 15 unbridged islands still have year-round communities, spread across Casco Bay, Penobscot Bay, and the waters off Port Clyde and Mount Desert Island. That is the count kept by the Island Institute, the Rockland nonprofit that works with those communities. Add the bridged islands, which you can simply drive to, and you have everything from a national park to a village of sixty-four people with no cars at all.

Here is what is actually out there, what it costs to get to, and what you can and cannot bring with you.

The Iconic Islands

Mount Desert Island

Access: Bridge, no ferry needed Population: About 10,500 year-round across four towns (2020 Census: Bar Harbor 5,089, Mount Desert 2,146, Southwest Harbor 1,756, Tremont 1,544) Time Needed: 3-7 days

Acadia National Park preserves approximately 50,000 acres along this stretch of coast, and the National Park Service describes it as protecting the highest rocky headlands on the Atlantic coastline of the United States.

Highlights:

• Cadillac Mountain - the summit is 1,530 feet, which NPS calls the highest point on the eastern seaboard. A separate $6 vehicle reservation is required to drive the Summit Road through the season, sold only on Recreation.gov and never at the park. NPS states the window slightly differently on different pages, so confirm the dates before you plan a sunrise. It is not needed on foot or by bike.
• Carriage roads - 45 miles, closed to cars
• Hiking - NPS gives two different totals on its own site, more than 150 miles of trails on the hiking page and 125 miles in the FAQ. Either way it is the most trail mileage of any Maine island.
• Jordan Pond - popovers, and no swimming or wading, it is a public water supply
• Bar Harbor - the island’s main town for restaurants, shops and lodging

Fees: $35 per vehicle for seven days, $20 per person on foot or bike, $70 annual. Non-US residents pay an extra $100 per person, everyone aged 16 and over, on top of the entrance fee, waived only with an Annual or America the Beautiful pass. For an overseas family of four that is $400 on top of the $35 car, so the annual pass is far cheaper.

Pro tip: Base yourself in Southwest Harbor or Tremont, on the quieter west side of the island, rather than Bar Harbor.

Peaks Island

Access: Casco Bay Lines from Portland, 17 minutes one way Fare: $16.00 adult round trip in peak season (18 April to 12 October 2026), $8.00 off peak. All Casco Bay Lines tickets are round trip and are collected in Portland. Population: About 860 year-round, 2,000 to 4,000 in summer (Island Institute) Time Needed: Half day to overnight

Peaks is a neighbourhood of the City of Portland and the most populated island in Casco Bay, which makes it the easy one. Boats run roughly hourly through the day in summer.

Highlights:

• Battery Steele - during the Second World War this was the most important fortification in Casco Bay, with two 16-inch guns triangulated by observation towers across the bay. It is now part of a 14-acre preserve held by the Peaks Island Land Preserve, which recommends reaching it on foot or by bike and posts a steward at weekends. Listed on the historic register in 2005.
• The island loop - the city-maintained perimeter route is 3.8 miles, per Portland Trails, and mostly flat. The Peaks Island Land Preserve maintains over 12 miles of trails across 17 parcels and protects more than 20% of the island.
• Umbrella Cover Museum - 62 Island Avenue, founded in 1996 by Nancy 3. Hoffman, a roughly 20-minute tour, and it turns 30 in 2026
• Fifth Maine Museum - 45 Seashore Avenue, island history and a permanent exhibit on Casco Bay’s harbour defences

Food and supplies: Hannigan’s Island Market for picnic supplies, plus several restaurants a short walk from the landing. Lodging: The Inn on Peaks Island, 33 Island Avenue, seven guest rooms, restaurant open to the public. Pro tip: Bikes can be rented on the island, so you do not have to wrestle one onto the first boat. A bike ticket is $7.00 adult, $3.50 child.

Vinalhaven

Access: Maine State Ferry Service from Rockland, 15 miles, 1 hour 15 minutes Fare: $23.00 adult round trip peak (1 June to 30 September), $15.75 off peak. A car is charged separately, $55.00 peak plus a $17.00 reservation fee, on top of every passenger’s ticket. Population: 1,279 (2020 Census), swelling to around 4,000 in summer Time Needed: 2-3 days

The Island Institute calls Vinalhaven Maine’s largest year-round island community. The boat lands at Carver’s Harbor on the south end, a quarter-mile walk from downtown, and lobster landings here are consistently among the highest in the state.

Highlights:

• Two town-owned swimming quarries. The Vinalhaven Land Trust is clear that of the island’s several abandoned granite quarries, only Booth’s Quarry and Lawson’s Quarry are town-owned and open to the public. Booth’s is 2 miles from the ferry along East Main Street; Lawson’s is closer, about 1.2 miles out the North Haven Road. Neither is lifeguarded, and the rest are private.
• Lane’s Island Preserve - a 45-acre Nature Conservancy preserve covering about two-thirds of Lane’s Island, reached by causeway from the village. Roughly a mile and a half of rustic trails over old fields, coastal shrubland and a rocky, cobble shore.
• Carver’s Harbor - a genuinely working lobster fleet, not a set piece
• Vinalhaven Historical Society - the land trust points visitors here for the quarrying history
• The Galamander - the restored granite-hauling wagon in the village park, on the National Register since 1970 and the island’s emblem

Lodging: The Tidewater Motel, built by the Crossman family on the bridge over the tide into Carver’s Pond and still run by them. Pro tip: Bring or rent a bike. Note that the Maine State Ferry Service runs no inter-island service, so there is no boat from here to North Haven; you go back through Rockland.

Monhegan Island

Access: Monhegan Boat Line from Port Clyde year round, Hardy Boat Cruises from New Harbor and Balmy Days Cruises from Boothbay Harbor in season Fare: Monhegan Boat Line is $52 adult round trip, $35 child aged 2 to 12, $10 per pet. Dock parking in Port Clyde is $10 a day. Hardy Boat sells one-way tickets only at $35 each, so $70 for the round trip. Population: 64 (2020 Census) Time Needed: Day trip or, better, overnight

Monhegan sits about ten miles off the nearest mainland and is barely a square mile in area. No cars. The Monhegan Boat Line states it plainly on its own schedule page: passengers only, no cars are allowed on the island. You park where you catch the boat.

Highlights:

• The Wildlands trails - Monhegan Associates, the land trust that owns and manages them, publishes approximately nine miles of trails across about 400 acres, fanning out from the village and along cliffs that are among the highest in Maine. Trails are narrow, rugged and rocky, with steep climbs and sheer drops, and are marked by number on small green blocks.
• Galleries and studios - the Lupine Gallery at Main Street and Wharf Hill Road, Winter Works, and Edison Studio. Pick up the Monhegan Artist Studio map and guide on the island at the Wharf Shed or the Rope Shed.
• Monhegan Light and the Monhegan Museum on Lighthouse Hill
• Cathedral Woods - the stand of tall spruce through the middle of the island

Practicalities that matter here more than anywhere else, per the island’s own visitor FAQ: there is no resident physician, though a volunteer First Aid Station operates from late May to mid-October across from the Monhegan Store. There are two ATMs, at The Barnacle and The Novelty, no bank, and a few businesses take cash only. There is no service for transporting people, so you walk; the inns and Monhegan Trucking will move your luggage from the dock. Golf carts exist but are for medical necessity. There are no street lights, so bring a torch if you are staying over.

Lodging: The Island Inn and Monhegan House at 1 Main Street, 28 rooms. Book well ahead.

The Bridge Islands

Deer Isle and Stonington

Access: Bridge from Sedgwick, no ferry Population: About 3,250 across two towns (2020 Census: Deer Isle 2,194, Stonington 1,056) Time Needed: 2-4 days

Highlights:

• Stonington - the working fishing village at the island’s southern tip, and the departure point for the Isle au Haut mailboat
• Haystack Mountain School of Crafts - the campus at 89 Haystack School Drive is open to visitors during posted hours from May to October, and the school runs scheduled campus tours in season. The 2026 tours have finished; details of 2027 tours go up in early May 2027. There is also an annual summer open house with demonstrations.
• Art galleries - a genuine concentration of working artists across both towns
• Nervous Nellie’s Jams and Jellies - jams, chutneys and a sculpture-strewn site on the Sunshine Road

Lodging: The historic inn in Deer Isle village long known as Pilgrim’s Inn now trades as The Ark. Various inns and rentals in Stonington. Pro tip: Drive all the way down to Stonington. The last few miles are the best of it.

Southport Island

Access: Swing bridge from Boothbay Harbor across Townsend Gut Population: 622 (2020 Census) Time Needed: Half day to full day

A quiet residential island a bridge away from one of the busiest harbours on the coast.

Highlights:

• Hendricks Head Light - a much-photographed light on the island’s west shore, best seen from the shore road or from the water
• Scenic driving - winding roads and water views on the loop around the island
• Cozy Harbor and the working wharves - the island’s small-boat heart

Note: Oliver’s, the restaurant this page used to recommend at Cozy Harbor, closed. The wharf reopened under a different name in 2019 and the old domain is now parked for sale, so nothing is named here. Check current openings with the Boothbay Harbor region before you count on lunch.

Orrs Island and Bailey Island

Access: Bridge-connected to the mainland via Harpswell on Route 24 Time Needed: Half day to full day

Highlights:

• The Cribstone Bridge - the Maine Atlas Project says it is believed to be the only one of its kind, not one of several. Built in 1927-28 to a design by Llewellyn N. Edwards of the Maine State Highway Commission, its foundation is 175 locally quarried granite slabs laid crisscross with no mortar or cement, about 10,000 tons of stone, open enough for the tide through Will’s Gut to run straight through it. On the National Register since 1975 and a National Historic Civil Engineering Landmark since 1984. The January 2024 storms shifted some of the stones, which had to be reset.
• Giant’s Stairs - a half-mile shore trail owned and managed by the Town of Harpswell, with Harpswell Heritage Land Trust’s McIntosh Lot Preserve completing an easy loop. The “stairs” are an eroded basalt dike, an intrusive volcanic seam worked on by 200 million years of weather. From the Cribstone Bridge, turn left on Washington Avenue and look for the designated roadside parking. No overnight parking.
• Cook’s Lobster and Ale House - 68 Garrison Cove Road on Bailey Island. It is near the Cribstone Bridge with the bridge in view from the dining room, not on it.
• Mackerel Cove - the island’s working lobster harbour, and one of the few places you get a proper look at the water from the paved road

Lodging: The Driftwood Inn, 81 Washington Avenue. Pro tip: Go at the end of the day. The light on the ledges is the whole point.

The Lake Island

Frye Island, Sebago Lake

Access: The Town of Frye Island runs its own car ferry from Raymond. It is seasonal and does not operate in winter, so check the town’s current ferry page before you go. Population: 32 (2020 Census). Frye Island is a seasonal town whose summer population is many times that.

The only island town in a Maine lake, and the only one on this page you reach without going to sea.

Highlights:

• Sandy freshwater beaches on both sides of the island
• Frye Island Golf Club - which describes itself as Sebago Lake’s only island golf course
• Boat launches and marinas for fishing, paddling and tubing on Sebago

Lodging: Seasonal vacation rentals only. There is no winter access.

The Remote Islands

Isle au Haut

Access: Isle au Haut Boat Services mailboat from Stonington. The National Park Service is explicit that this is a year-round, passenger-only ferry, so you cannot bring a vehicle. Fare: $48 adult round trip, $24 one way, plus a temporary $1.00 fuel surcharge on each adult one-way fare. Bicycles $15, e-bikes and kayaks $35. Crossing: About 45 minutes to the Town Landing, plus 20 more to Duck Harbor when that stop is running. Population: The town says its year-round population is roughly 54, reaching over 250 in summer. The 2020 Census counted 92.

Half the island is Acadia National Park, and it is the least crowded half of Acadia by a long way.

Highlights:

• Eighteen miles of trails through rocky shoreline, wooded uplands, marshes, bogs and past a mile-long freshwater lake. NPS warns the trails are rough: bring proper foot gear, warm clothing and rain gear.
• Duck Harbor Campground - Acadia’s five lean-to shelters, reservable only through Recreation.gov, with every reservation for the whole season released at 10 am on 1 April. There is no potable water, so carry or treat your own.
• Roads and bikes - five miles of paved and seven miles of unpaved road. Mountain bikes are recommended, bicycles are banned on the hiking trails, and the ferry charges extra to carry one.
• The village - a small store and a post office with limited hours near the town landing, and almost nothing else

Pro tip: The Duck Harbor stop is seasonal and the winter schedule drops it entirely along with Sunday service. Check the operator’s schedule, not a general one, before planning a trailhead arrival.

Matinicus

Access: Maine State Ferry Service from Rockland, a 23-mile crossing taking 1 hour 45 minutes, on a published schedule of roughly 40 sailings for the entire year, one a month in January and February. Or fly: Penobscot Island Air runs air service to the Penobscot Bay islands. Fare: $25.00 adult round trip, no seasonal split. A vehicle is $125.00, reservation included. Population: 53 (2020 Census). The Island Institute measures the island as 20 miles off Owls Head, the state ferry measures a 23-mile crossing from Rockland.

Maine’s most remote year-round island community. The name means “far-out island” in Abenaki, and there is no ferry terminal on the island, so every arrangement goes through Rockland.

Highlights:

• Genuine remoteness, a tiny working harbour, and independent lobstermen
• Seabird colonies in the surrounding waters, including puffins on nearby ledges
• Almost no visitors, and almost no visitor infrastructure

Lodging: Extremely limited. Confirm you have somewhere to sleep before you get on the boat. Pro tip: This is not a casual day trip. Flying is more reliable than the ferry, and neither is guaranteed in weather.

Swan’s Island

Access: Maine State Ferry Service from Bass Harbor on Mount Desert Island, 6 miles, 40 minutes aboard the Captain Henry Lee, which carries cars. The town’s own site describes the crossing as about 30 minutes; the ferry service publishes 40. Fare: $23.00 adult round trip peak, $15.75 off peak, with the vehicle charged separately. Bass Harbor sells only four vehicle reservations per trip and they go early in summer. Population: About 350 year-round and over 1,000 in summer, per the town. The lighthouse trust gives 300 and 700. Size: About 7,000 acres

Highlights:

• Baird’s Quarry, known locally as the quarry pond, on Quarry Pond Road just off the Minturn Loop. Freshwater swimming and a good picnic spot.
• Burnt Coat Harbor Light on Hockamock Head - the lighthouse park has 1.8 miles of marked trails, and maps are available at the Keeper’s House
• Three villages - Atlantic on Mackerel Cove in the north, Minturn, and Swan’s Island itself on Burnt Coat Harbor in the south
• Four beaches with public access - Long Point and Burying Point inside the lighthouse park, plus Carrying Place and Fine Sand. Carrying Place is the only one easily reached by car.
• Swan’s Island Lobster and Marine Museum, about 100 yards from the ferry terminal

Pro tip: Services are very limited. Bring what you need, and note the town’s official site is townofswansisland.gov, not the older .org address, which has lapsed.

Day Trip Islands

Great Diamond Island

Access: Casco Bay Lines from Portland, 20 to 25 minutes, $16.00 adult round trip peak Time Needed: 2-4 hours, or an afternoon over lunch

This is a car-free island. Casco Bay Lines notes it has a limited road network and that golf carts and bicycles are the primary transport, and the island markets itself as car free.

Highlights:

• Fort McKinley - not a Civil War fort. It is an Endicott-period coastal defence work begun in 1897 and completed by 1906, named for President William McKinley, and the Fort McKinley Historic District has been on the National Register since 1985. The barracks and officers’ quarters at Diamond Cove are now private homes. The abandoned concrete gun batteries in the woods are private property and off limits on safety grounds, so admire the fort’s architecture from the public ways and leave the batteries alone.
• Diamond’s Edge Restaurant - at Diamond Cove, open for the 2026 season from 20 June, Thursday through Sunday. Check before you sail, the schedule is short.
• Quiet - far less developed than Peaks

Chebeague Island

Two ferries, and they land in different places. Getting this wrong will cost you an hour’s walk.

• Casco Bay Lines from Portland: 60 to 90 minutes, landing at Chandler’s Cove. From there it is 1.6 miles to the boatyard, the Niblic and the post office, 2.3 miles to the library and town hall, 2.9 miles to the museum, and 3.2 miles to the inn and the golf club. Fare $16.00 adult round trip peak.
• Chebeague Transportation Company from Cousins Island in Yarmouth: roughly 15 minutes to the island’s Stone Pier, which is the end of the island most visitors actually want. A shuttle bus runs from a mainland lot on Route 1 to the wharf. On fares effective 22 May 2026, an adult is $13 one way and $21 round trip, children 6 to 11 are $5.50 and $7.50, under 6 free, and bikes and pets are $5.50 and $7.50. Tickets must be bought in advance.

Population: Over 360 year-round and more than 1,600 in summer Size: Almost five miles long and a mile and a half wide, the largest island in Casco Bay Time Needed: Full day

Highlights:

• Great Chebeague Golf Club - a nine-hole links course founded in 1920 with a water view from every hole, and a clubhouse in a circa-1807 house
• Cycling - the circular island road is the best way to see it
• Beaches - several, including the sandy north end
• The island museum and library - both a walk from Chandler’s Cove

Lodging: Chebeague Island Inn, 61 South Road. Pro tip: If you land at Chandler’s Cove, bring a bike or plan on the island taxi.

Long Island

Access: Casco Bay Lines from Portland, 30 to 60 minutes, $16.00 adult round trip peak Population: About 200 in winter, over 1,000 in summer Size: Six miles off Portland, about three miles long and one mile wide

Long Island became its own town in 1993 after seceding from the City of Portland, and is one of the 15 unbridged Maine islands with a year-round community.

Highlights:

• Sandy Beach - the island’s best-known, where the sand squeaks and sings underfoot
• South Beach - beautiful, and a piping plover nesting site, which is why the town bans fireworks there. Give nesting areas a wide berth in season.
• Shore walks - the island’s quiet roads and coastline reward slow wandering
• Two stores, a post office, and an inn that serves dinner

Pro tip: There are no bike rentals on Long Island, so bring your own or plan to walk.

Islands by Interest

Best for Hiking

1. Mount Desert Island - Acadia, by a wide margin, whichever NPS trail total you believe
2. Isle au Haut - 18 miles of Acadia trails and hardly anyone on them
3. Monhegan - about nine miles through the Wildlands and along the cliffs
4. Vinalhaven - Lane’s Island Preserve plus the land trust’s other holdings

Best for Families

1. Mount Desert Island - most amenities, and the park
2. Peaks Island - short crossing, flat loop, beaches, bike rentals
3. Chebeague - golf, beaches and space, if you take the Cousins Island ferry

Best for Solitude

1. Matinicus - as remote as Maine gets
2. Isle au Haut - wilderness with a mailboat
3. Swan’s Island - quiet, and very few day trippers
4. Vinalhaven - a working island where tourism is not the point

Best Working Fishing Communities

1. Vinalhaven - lobster landings among the highest in the state
2. Stonington - one of Maine’s busiest lobster ports
3. Swan’s Island - about 40 full-time lobstermen and women
4. Matinicus - independent, and a long way out

Best for First-Time Island Visitors

1. Peaks Island - 17 minutes from Portland, hard to get wrong
2. Mount Desert Island - drive on, everything is there
3. Monhegan - the classic, if you have a full day
4. Bailey Island - a bridge, a bridge worth seeing, and a shore trail

Practical Information

Ferry Costs

Adult round-trip fares as published by each operator, checked September 2026. See the Maine Ferry Guide for vehicle fares, bicycles, and the full seasonal tables.

• Casco Bay Lines (all Portland islands, one flat fare): $16.00 peak, $8.00 off-peak. Peak season for 2026 is 18 April to 12 October. Every ticket is round trip and is collected in Portland.
• Chebeague Transportation Company (Cousins Island, Yarmouth to Chebeague): $21.00 round trip, $13.00 one way, on fares effective 22 May 2026
• Maine State Ferry Service (Vinalhaven, North Haven, Swan’s Island, Frenchboro): $23.00 peak, $15.75 off-peak, walk-on. Islesboro is $17.00 and $10.25, Matinicus $25.00 with no seasonal split. A car is charged separately, $55.00 peak on the Rockland and Bass Harbor routes plus a $17.00 reservation fee, on top of every passenger’s ticket.
• Monhegan Boat Line from Port Clyde: $52.00. Hardy Boat Cruises from New Harbor sells one-way tickets only, $35.00 each, so $70.00 for the round trip.
• Isle au Haut Boat Services from Stonington: $48.00, plus a temporary $1.00 per adult one-way fuel surcharge.
• Frye Island runs its own seasonal car ferry from Raymond. The town publishes the schedule and fees as documents rather than web pages, so check the ferry page directly.

Bringing Your Car

Islands you can drive to:

• Mount Desert Island, Deer Isle and Stonington, Southport, and Orrs and Bailey islands, all by bridge

Islands where a ferry will carry your car:

• Vinalhaven, North Haven, Islesboro, Swan’s Island, Frenchboro and Matinicus, on the Maine State Ferry Service. Reservations are separate and Bass Harbor sells only four car spaces per trip.
• Peaks Island, on the Casco Bay Lines car ferry Machigonne II, first come first served
• Frye Island, on the town’s own ferry from Raymond

Islands where you cannot take a car:

• Monhegan. The operator says it outright: passengers only, no cars. Trucks and medical golf carts are all that move on the island.
• Isle au Haut. The mailboat is passenger only. The island has 12 miles of road but you cannot bring a vehicle to drive on them, which is why mountain bikes are recommended.
• Great Diamond. Car free by design, golf carts and bicycles only.
• Long, Cliff, Little Diamond and Chebeague. Casco Bay Lines vehicle service to these islands is not regularly scheduled and requires a reservation; Chebeague Transportation barges vehicles separately from its passenger ferry. Neither is a casual visitor option.

What to Bring

Day trips:

• Water and food. Options are limited on the small islands and seasonal on most of them.
• Layers and a rain jacket. It is always cooler on the water.
• Cash. Monhegan has exactly two ATMs and a few businesses there take cash only. Smaller islands have none at all.
• Sturdy shoes. Island roads are often unpaved and shore trails are rocky.
• A bike if you have one, for Chebeague, Long Island, Swan’s Island and Vinalhaven especially.

Overnight, add:

• Groceries, because island stores are small and expensive
• A torch. Monhegan has no street lights and neither do most island roads.
• Bug spray in summer, and warm layers for the evening
• Any prescription medication, plus a basic first aid kit. Several islands have no resident doctor.

Best Times to Visit

Summer, July and August: every ferry on a full schedule, every business open, and the highest fares and the biggest crowds. Book lodging months ahead.

Shoulder, May to June and September to October: fewer people, some businesses closed, thinner ferry schedules, and often the best weather of the year in September.

Off-season, November to April: only essential routes run, weather cancels boats, and most inns and restaurants are shut. This is island life at its most real and least convenient.

Island Hopping Routes

Casco Bay in a day

One Casco Bay Lines ticket does not let you hop islands. The operator defines round trip passage as transportation to an island with return on a different boat, so one ticket equals one island. Peaks Island sits on its own route and the Mailboat Run does not call there.

If you want several islands in one outing, the honest options are:

• The Mailboat Run, $24.00 adult, a working boat calling at Little Diamond, Great Diamond, Long, Cliff and Chebeague over 2.5 to 3.5 hours. You stay aboard.
• One island, done properly. Peaks in the morning is a genuinely good half day, and you can be back in Portland for lunch.

Penobscot Bay over several days

Time: 4-5 days Route: Vinalhaven, then back through Rockland to North Haven, then down to Stonington for Isle au Haut The catch: the Maine State Ferry Service runs no inter-island service for vehicles or passengers. Every island-to-island move goes back through the mainland terminal, so build the return crossings into your plan rather than assuming a hop.

Downeast over a week

Route: Mount Desert Island for three days, Deer Isle and Stonington for two, and a day on Swan’s Island from Bass Harbor Mix: two bridge islands and one ferry island, which keeps the logistics simple

Budget Tips

1. Leave the car. On the Rockland and Bass Harbor routes a peak-season vehicle is $55.00 plus a $17.00 reservation on top of everyone’s passenger ticket, so walking on saves $72.00. To Islesboro it is $42.50 plus a $27.25 reservation. To Matinicus a vehicle is $125.00.
2. Travel off peak. Casco Bay Lines halves exactly, $16.00 to $8.00, on 13 October 2026. Maine State Ferry off-peak fares start 1 October.
3. Pack lunch. Island restaurants are few, seasonal and priced accordingly.
4. Day trip instead of staying. Island lodging is scarce, which keeps it expensive.
5. Bring your own bike rather than paying twice. A Casco Bay Lines bike ticket is $7.00; on the Rockland routes a bicycle ticket includes the passenger fare and runs $29.75 peak.

Safety and Etiquette

Safety

• Know the last boat. Missing it on a small island is a genuine problem, not an inconvenience.
• Fog cancels boats. Maine State Ferry Service decides 30 minutes before departure.
• Medical care is thin. Several islands have no resident physician and limited equipment.
• Cell service is patchy. Download offline maps before you sail.

Etiquette

• These are people’s homes, not an attraction. Respect private property, and note that some historic sites, such as the Fort McKinley batteries on Great Diamond, are privately owned and closed.
• Give nesting birds room, especially on Long Island’s South Beach.
• Spend money locally. Buy lunch, buy groceries, buy from the gallery.
• Stay clear of working areas. Docks, freight and hauling gear are somebody’s job.
• Go slowly and quietly on narrow roads shared with pedestrians.

Booking Ahead

Book as early as you can:

• Isle au Haut camping. Not months of flexibility: Acadia releases the entire season at 10 am on 1 April on Recreation.gov, and the five lean-tos go fast.
• Monhegan inns for summer
• Mount Desert Island in July and August
• Maine State Ferry vehicle reservations, which open one month ahead by phone at 9:30 AM

More flexible:

• Vinalhaven rentals
• Deer Isle and Stonington inns
• Swan’s Island, though there is not much of it
• Great Diamond and Chebeague

Maine’s islands offer something increasingly rare: places where life slows down, where cars are not necessary or in several cases not allowed, where fishing is a present-day livelihood rather than a nostalgic memory, and where the tide and the ferry timetable set the shape of the day.