Maine boating conditions
Maine Coast marine forecast
A coast-long comparison from the southern harbors to Mount Desert, without treating Casco Bay as the whole state.
The regional picture
One body of water. More than one kind of boat day.
Maine's coastal waters change between the southern beaches, the Midcoast islands, and the Mount Desert approaches. One state forecast map hides that. These harbor briefings are the reviewed destinations along that coast.
Portland and the islands inside Casco Bay have their own marine forecast page. Start there for a Casco day, and use this page when the route runs downeast or west of the bay.
Harbor-level briefings
Compare conditions around Maine Coast
Southern coast
Harbors west of Casco Bay.
Midcoast
Penobscot Bay and the harbors between Casco and Mount Desert.
A sheltered Midcoast harbor known for island passages, busy summer docks, and nearby coves.
Open marine conditions MECamden HarborA compact Penobscot Bay harbor beneath the Camden Hills with strong cruising connections north and south.
Open marine conditions MERockland HarborA broad, breakwater-protected Penobscot Bay harbor with a substantial working waterfront and marine services.
Open marine conditionsMount Desert and east
Island harbors with exposure that a bay forecast does not capture.
A working harbor and cruising hub on Mount Desert Island with direct access to Frenchman Bay.
Open marine conditions MESouthwest HarborA protected Mount Desert Island harbor near Somes Sound, Acadia, and the western approaches to the island.
Open marine conditions MEStonington and Deer IsleA granite-island cruising area with a working harbor and intricate approaches among Merchant Row islands.
Open marine conditionsTide charts
Tide charts around Maine Coast
- Rye Harbor tide chartCO-OPS 8418911
- Portland Harbor tide chartCO-OPS 8418150
- Bar Harbor tide chartCO-OPS 8413320
Before leaving the dock
Three useful checks for Maine Coast
- Open the Casco Bay marine forecast for Portland instead of reading the whole coast as one number.
- Compare a southern harbor such as Kennebunkport with a Midcoast harbor when the trip spans both.
- Open the harbor you are leaving. Several Downeast harbors share one CO-OPS station, and the tide chart names that station.
What this regional guide can - and cannot - do
These pages make it easier to compare the latest available forecast and observation inputs around Maine Coast. They are planning aids, not navigation or safety guarantees. Check the official coastal waters forecast, current observations and notices, local conditions, and your own boat and crew before departure.
See how Boat or Nope builds each call