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Coldest beach in Maine in August

158 coastal locations in Maine ranked by their typical August sea temperature. State-wide average in August: 16.7°C.

Coldest in August

Acadia

9.7°C

State August average

16.7°C

across 158 coastal locations in Maine

Vs annual mean

+6.7°C

above the year-round state average

What the Maine water feels like in August

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

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

Where August fits in the year

August sits inside the state pattern shown on the left. Browse a different month for a fresh ranking.

Maine sea temperature map (live)

Today's reading at every Maine beach we track. The list below uses the typical August mean from a decade of daily history.

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 Maine beaches in August

Sorted by typical August mean. Click any beach for the full location page.

# Location August mean
1 Castine Maine 15.4°C
2 North Haven, Penobscot Bay, Maine Maine 15.4°C
3 Pulpit Harbor, North Haven Island, Penobscot Bay Maine 15.4°C
4 Deer Isle Maine 15.3°C
5 Stonington Maine 15.3°C
6 Sedgwick Maine 14.9°C
7 Surry Maine 14.9°C
8 Blue Hill Harbor, Blue Hill Bay, Maine Maine 14.9°C
9 Center Harbor, Eggemoggin Reach, Maine Maine 14.9°C
10 Isle Au Haut, Penobscot Bay, Maine Maine 14.9°C
11 Little Deer Isle, Eggemoggin Reach, Maine Maine 14.9°C
12 Oceanville, Deer Isle, Penobscot Bay Maine 14.9°C
13 Stonington, Deer Isle, Penobscot Bay, Maine Maine 14.9°C
14 Bass Harbor, Mount Desert Island, Maine Maine 14.7°C
15 Lamoine Maine 14.7°C
16 Mackerel Cove, Swans Island, Blue Hill Bay Maine 14.7°C
17 Southwest Harbor, Mount Desert Island, Maine Maine 14.7°C
18 Tremont Maine 14.7°C
19 Trenton Maine 14.7°C
20 Bar Harbor Maine 14.5°C
21 Cutler Maine 14.1°C
22 Steele Harbor Island, Maine Maine 14.0°C
23 Machiasport Maine 14.0°C
24 Addison Maine 13.9°C
25 Beals Island Maine 13.9°C
Show 25 more ▸
26 Jonesport Maine 13.9°C
27 Ellsworth, Union River, Blue Hill Bay Maine 13.8°C
28 Green Island, Petit Manan Bar, Maine Maine 13.8°C
29 Prospect Harbor, Maine Maine 13.8°C
30 Prospect Harbour Maine 13.8°C
31 Winter Harbor, Frenchman Bay, Maine Maine 13.8°C
32 Milbridge Maine 13.7°C
33 Steuben Maine 13.7°C
34 Franklin Maine 13.6°C
35 Hancock Maine 13.6°C
36 Sullivan Maine 13.6°C
37 Eastport, Passamaquoddy Bay Maine 13.6°C
38 Pettegrove Point, Dochet Island Maine 13.6°C
39 West Quoddy Head Maine 13.6°C
40 Eastport Maine 13.5°C
41 Birch Islands, Cobscook Bay, Maine Maine 13.1°C
42 Coffin Point, Coffin Neck Maine 13.1°C
43 Cutler, Little River, Maine Maine 13.1°C
44 Garnet Point, Hersey Neck, Pennamquan River, Cobscook Bay Maine 13.1°C
45 Gravelly Point, Whiting Bay Maine 13.1°C
46 Gulf of Maine Maine 12.9°C
47 Cutler Naval Base, Machias Bay Maine 12.9°C
48 Shoppee Point, Englishman Bay, Maine Maine 12.9°C
49 Stone Island, Machias Bay, Maine Maine 12.9°C
50 Acadia Maine 9.7°C

Warmest 10 in Maine in August

Same data flipped. The warmest spots in the state for this month.

# Location August mean
1 Kittery Maine 19.2°C
2 Ogunquit Maine 19.2°C
3 York Beach Maine 19.2°C
4 York Harbor Maine 19.2°C
5 Casco Bay Maine 19.2°C
6 Biddeford Pool Maine 19.1°C
7 Biddeford Maine 19.1°C
8 Goose Rocks Beach Maine 19.1°C
9 Kennebunkport Maine 19.1°C
10 Wells Maine 18.9°C

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