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Coldest beach in Maine in May

158 coastal locations in Maine ranked by their typical May sea temperature. State-wide average in May: 8.7°C.

Coldest in May

Acadia

5.6°C

State May average

8.7°C

across 158 coastal locations in Maine

Vs annual mean

-1.3°C

below the year-round state average

What the Maine water feels like in May

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

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 May fits in the year

May 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 May 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 May

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

# Location May mean
1 Matinicus Harbor, Wheaton Island, Penobscot Bay, Maine Maine 8.1°C
2 Blue Hill Harbor, Blue Hill Bay, Maine Maine 7.9°C
3 Center Harbor, Eggemoggin Reach, Maine Maine 7.9°C
4 Isle Au Haut, Penobscot Bay, Maine Maine 7.9°C
5 Little Deer Isle, Eggemoggin Reach, Maine Maine 7.9°C
6 Oceanville, Deer Isle, Penobscot Bay Maine 7.9°C
7 Stonington, Deer Isle, Penobscot Bay, Maine Maine 7.9°C
8 Sedgwick Maine 7.9°C
9 Surry Maine 7.9°C
10 Deer Isle Maine 7.8°C
11 Stonington Maine 7.8°C
12 Bass Harbor, Mount Desert Island, Maine Maine 7.7°C
13 Frenchboro Maine 7.7°C
14 Mackerel Cove, Swans Island, Blue Hill Bay Maine 7.7°C
15 Southwest Harbor, Mount Desert Island, Maine Maine 7.7°C
16 Swans Island Maine 7.7°C
17 Ellsworth, Union River, Blue Hill Bay Maine 7.6°C
18 Lamoine Maine 7.6°C
19 Prospect Harbor, Maine Maine 7.6°C
20 Prospect Harbour Maine 7.6°C
21 Tremont Maine 7.6°C
22 Trenton Maine 7.6°C
23 Winter Harbor, Frenchman Bay, Maine Maine 7.6°C
24 Green Island, Petit Manan Bar, Maine Maine 7.5°C
25 Bar Harbor Maine 7.4°C
Show 25 more ▸
26 Steele Harbor Island, Maine Maine 7.3°C
27 Franklin Maine 7.3°C
28 Hancock Maine 7.3°C
29 Sullivan Maine 7.3°C
30 Milbridge Maine 7.2°C
31 Steuben Maine 7.2°C
32 Addison Maine 7.1°C
33 Beals Island Maine 7.1°C
34 Jonesport Maine 7.1°C
35 Machiasport Maine 7.0°C
36 Cutler Maine 7.0°C
37 Eastport, Passamaquoddy Bay Maine 6.9°C
38 Pettegrove Point, Dochet Island Maine 6.9°C
39 West Quoddy Head Maine 6.9°C
40 Eastport Maine 6.8°C
41 Cutler Naval Base, Machias Bay Maine 6.8°C
42 Shoppee Point, Englishman Bay, Maine Maine 6.8°C
43 Stone Island, Machias Bay, Maine Maine 6.8°C
44 Birch Islands, Cobscook Bay, Maine Maine 6.7°C
45 Coffin Point, Coffin Neck Maine 6.7°C
46 Cutler, Little River, Maine Maine 6.7°C
47 Garnet Point, Hersey Neck, Pennamquan River, Cobscook Bay Maine 6.7°C
48 Gravelly Point, Whiting Bay Maine 6.7°C
49 Gulf of Maine Maine 6.7°C
50 Acadia Maine 5.6°C

Warmest 10 in Maine in May

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

# Location May mean
1 Kittery Maine 10.1°C
2 Ogunquit Maine 10.1°C
3 York Beach Maine 10.1°C
4 York Harbor Maine 10.1°C
5 Atlantic Heights, Piscataqua River, New Hampshire Maine 10.0°C
6 Cape Neddick, Maine Maine 10.0°C
7 Fort Point, York Harbor, Maine Maine 10.0°C
8 Gerrish Island, Portsmouth Harbor, New Hampshire Maine 10.0°C
9 Kennebunk Beach Maine 10.0°C
10 Kittery Point, Portsmouth Harbor, New Hampshire Maine 10.0°C

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