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Warmest beach in Maine in September

158 coastal locations in Maine ranked by their typical September sea temperature. State-wide average in September: 15.5°C.

Warmest in September

Kittery

17.9°C

State September average

15.5°C

across 158 coastal locations in Maine

Vs annual mean

+5.5°C

above the year-round state average

What the Maine water feels like in September

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 September fits in the year

September 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 September 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 warmest Maine beaches in September

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

# Location September mean
1 Kittery Maine 17.9°C
2 Ogunquit Maine 17.9°C
3 York Beach Maine 17.9°C
4 York Harbor Maine 17.9°C
5 Wells Maine 17.5°C
6 Biddeford Pool Maine 17.5°C
7 Biddeford Maine 17.5°C
8 Goose Rocks Beach Maine 17.5°C
9 Kennebunkport Maine 17.5°C
10 Atlantic Heights, Piscataqua River, New Hampshire Maine 17.5°C
11 Cape Neddick, Maine Maine 17.5°C
12 Fort Point, York Harbor, Maine Maine 17.5°C
13 Gerrish Island, Portsmouth Harbor, New Hampshire Maine 17.5°C
14 Kennebunk Beach Maine 17.5°C
15 Kittery Point, Portsmouth Harbor, New Hampshire Maine 17.5°C
16 Seapoint, Cutts Island, Maine Maine 17.5°C
17 Seavey Island, Portsmouth Harbor Maine 17.5°C
18 Wells, Webhannet River Maine 17.5°C
19 York Harbor, Maine Maine 17.5°C
20 Higgins Beach Maine 17.1°C
21 Old Orchard Beach Maine 17.1°C
22 Portland Maine 17.1°C
23 Scarborough Maine 17.1°C
24 Back Cove, Casco Bay, Maine Maine 17.1°C
25 Biddeford, Saco River Maine 17.1°C
Show 25 more ▸
26 Camp Ellis, Saco River Entrance Maine 17.1°C
27 Cape Porpoise, Maine Maine 17.1°C
28 Fore River, Casco Bay, Maine Maine 17.1°C
29 Pine Point Maine 17.1°C
30 Saco Bay Maine 17.1°C
31 Scarborough Beach Maine 17.1°C
32 Cape Elizabeth Maine 17.1°C
33 Peaks Island Maine 17.1°C
34 South Portland Maine 17.1°C
35 Casco Bay Maine 17.0°C
36 Cliff Island, Luckse Sound, Casco Bay, Maine Maine 16.6°C
37 Cow Island, Casco Bay, Maine Maine 16.6°C
38 Cushing Island, Casco Bay, Maine Maine 16.6°C
39 Doyle Point, Casco Bay, Maine Maine 16.6°C
40 Falmouth Foreside, Casco Bay, Maine Maine 16.6°C
41 Great Chebeague Island, Casco Bay, Maine Maine 16.6°C
42 Great Diamond Island, Casco Bay, Maine Maine 16.6°C
43 Long Island, Casco Bay, Maine Maine 16.6°C
44 Peak Island, Casco Bay, Maine Maine 16.6°C
45 Portland, Casco Bay Maine 16.6°C
46 Portland Head Light, Casco Bay, Maine Maine 16.6°C
47 Presumpscot River Bridge, Casco Bay, Maine Maine 16.6°C
48 Prince Point, Casco Bay, Maine Maine 16.6°C
49 South Freeport, Casco Bay, Maine Maine 16.6°C
50 South Harpswell, Potts Harbor, Casco Bay, Maine Maine 16.6°C

Coldest 10 in Maine in September

Same data the other way.

# Location September mean
1 Acadia Maine 8.2°C
2 Cutler Naval Base, Machias Bay Maine 12.7°C
3 Shoppee Point, Englishman Bay, Maine Maine 12.7°C
4 Stone Island, Machias Bay, Maine Maine 12.7°C
5 Gulf of Maine Maine 12.8°C
6 Birch Islands, Cobscook Bay, Maine Maine 12.8°C
7 Coffin Point, Coffin Neck Maine 12.8°C
8 Cutler, Little River, Maine Maine 12.8°C
9 Garnet Point, Hersey Neck, Pennamquan River, Cobscook Bay Maine 12.8°C
10 Gravelly Point, Whiting Bay Maine 12.8°C

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