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Coldest beach in Maine

158 coastal locations in Maine ranked by year-round average sea temperature, coldest first. The state-wide average is 9.9°C. The coldest month is March at 4.0°C. Click any beach for its 30-day chart and 10-year history.

Coldest year-round

Acadia

4.7°C annual mean

State-wide average

9.9°C

across 158 Maine coastal locations

Coldest month

March

4.0°C state-wide average

What the water feels like in March

Water at this temperature is freezing cold, can cause pain and takes your breath away. Unless you are very experienced and are under strict supervision, swimming in this water for more than a few minutes can be very dangerous. Be careful, stay safe, and enjoy the rush of endorphins and exhilaration from a brief cold water swim.

Maine monthly average 4.0°C to 16.7°C
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  • Warmest month August 16.7°C
  • Coldest month March 4.0°C
  • Annual mean 9.9°C
  • Months above 20°C 0 of 12

Month by month around the Maine coast

Maine sea temperatures swing from 4.0°C in March to 16.7°C in August on average across the coast. That's a spread of 13°C. Pick a single month for a focused ranking:

Maine sea temperature map

Today's pin colours show the latest daily reading at every Maine beach we track. Drag and zoom; click any pin for that beach's full page.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest beaches in Maine

Sorted by year-round average. Click any beach for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Bass Harbor, Mount Desert Island, Maine Maine 9.2°C
2 Blue Hill Harbor, Blue Hill Bay, Maine Maine 9.2°C
3 Center Harbor, Eggemoggin Reach, Maine Maine 9.2°C
4 Isle Au Haut, Penobscot Bay, Maine Maine 9.2°C
5 Little Deer Isle, Eggemoggin Reach, Maine Maine 9.2°C
6 Oceanville, Deer Isle, Penobscot Bay Maine 9.2°C
7 Stonington, Deer Isle, Penobscot Bay, Maine Maine 9.2°C
8 Castine Maine 9.2°C
9 Lamoine Maine 9.2°C
10 Tremont Maine 9.2°C
11 Trenton Maine 9.2°C
12 Bar Harbor Maine 9.1°C
13 Sedgwick Maine 9.1°C
14 Surry Maine 9.1°C
15 Belfast Maine 9.1°C
16 Bucksport Maine 9.1°C
17 Lincolnville Maine 9.1°C
18 Orland Maine 9.1°C
19 Vinalhaven Maine 9.1°C
20 Winterport Maine 9.1°C
21 Cutler Maine 9.1°C
22 Steele Harbor Island, Maine Maine 9.0°C
23 Machiasport Maine 9.0°C
24 Addison Maine 9.0°C
25 Beals Island Maine 9.0°C
Show 25 more ▸
26 Jonesport Maine 9.0°C
27 Green Island, Petit Manan Bar, Maine Maine 8.9°C
28 Ellsworth, Union River, Blue Hill Bay Maine 8.9°C
29 Prospect Harbor, Maine Maine 8.9°C
30 Prospect Harbour Maine 8.9°C
31 Winter Harbor, Frenchman Bay, Maine Maine 8.9°C
32 Eastport Maine 8.8°C
33 Milbridge Maine 8.8°C
34 Steuben Maine 8.8°C
35 Eastport, Passamaquoddy Bay Maine 8.8°C
36 Franklin Maine 8.8°C
37 Hancock Maine 8.8°C
38 Pettegrove Point, Dochet Island Maine 8.8°C
39 Sullivan Maine 8.8°C
40 West Quoddy Head Maine 8.8°C
41 Birch Islands, Cobscook Bay, Maine Maine 8.7°C
42 Coffin Point, Coffin Neck Maine 8.7°C
43 Cutler, Little River, Maine Maine 8.7°C
44 Garnet Point, Hersey Neck, Pennamquan River, Cobscook Bay Maine 8.7°C
45 Gravelly Point, Whiting Bay Maine 8.7°C
46 Cutler Naval Base, Machias Bay Maine 8.6°C
47 Gulf of Maine Maine 8.6°C
48 Shoppee Point, Englishman Bay, Maine Maine 8.6°C
49 Stone Island, Machias Bay, Maine Maine 8.6°C
50 Acadia Maine 4.7°C

Warmest 10 in Maine for contrast

Same data flipped. The warmest year-round spots in the state.

# Location Annual mean
1 Kittery Maine 11.2°C
2 Ogunquit Maine 11.2°C
3 York Beach Maine 11.2°C
4 York Harbor Maine 11.2°C
5 Biddeford Pool Maine 11.1°C
6 Biddeford Maine 11.1°C
7 Goose Rocks Beach Maine 11.1°C
8 Kennebunkport Maine 11.1°C
9 Casco Bay Maine 11.0°C
10 Atlantic Heights, Piscataqua River, New Hampshire Maine 11.0°C

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