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Coldest beach in Connecticut in May

61 coastal locations in Connecticut ranked by their typical May sea temperature. State-wide average in May: 12.8°C.

Coldest in May

West Mystic, Mystic River, Long Island Sound

11.2°C

State May average

12.8°C

across 61 coastal locations in Connecticut

Vs annual mean

-0.4°C

below the year-round state average

What the Connecticut water feels like in May

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

Connecticut monthly average 3.1°C to 23.3°C
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  • Warmest month August 23.3°C
  • Coldest month February 3.1°C
  • Annual mean 13.2°C
  • Months above 20°C 3 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.

Connecticut sea temperature map (live)

Today's reading at every Connecticut 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 Connecticut beaches in May

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

# Location May mean
1 Branford Connecticut 13.6°C
2 Bridgeport Connecticut 13.6°C
3 Milford Connecticut 13.6°C
4 Cos Cob Harbor, Connecticut Connecticut 13.4°C
5 East Norwalk Connecticut 13.4°C
6 Long Neck Point, Long Island Sound Connecticut 13.4°C
7 Mianus Connecticut 13.4°C
8 Rowayton, Fivemile River, Connecticut Connecticut 13.4°C
9 Saugatuck, Saugatuck River, Long Island Sound Connecticut 13.4°C
10 South Norwalk, Connecticut Connecticut 13.4°C
11 South Norwalk, Norwalk River Connecticut 13.4°C
12 Southport, Southport Harbor Connecticut 13.4°C
13 Stamford Harbor, Stamford Connecticut 13.4°C
14 Great Captain Island Connecticut 13.3°C
15 Black Rock Harbor, Cedar Creek Connecticut 13.2°C
16 Gulf Beach, Connecticut Connecticut 13.2°C
17 Long Hill, Housatonic River, Connecticut Connecticut 13.2°C
18 Milford Harbor, Connecticut Connecticut 13.2°C
19 Shelton, Housatonic River, Connecticut Connecticut 13.2°C
20 Sniffens Point, Housatonic River, Connecticut Connecticut 13.2°C
21 Stratford, I-95 bridge, Housatonic River, Connecticut Connecticut 13.2°C
22 Clinton Connecticut 12.8°C
23 Guilford Connecticut 12.8°C
24 Hammonasset Beach Connecticut 12.8°C
25 Madison Connecticut 12.8°C
Show 25 more ▸
26 Woodmont Connecticut 12.8°C
27 Haddam, Connecticut River, Connecticut Connecticut 12.3°C
28 Old Lyme Connecticut 12.0°C
29 Old Saybrook Connecticut 12.0°C
30 Saybrook Manor Connecticut 12.0°C
31 Westbrook Connecticut 12.0°C
32 East Haddam Connecticut 11.8°C
33 Essex, Connecticut River, Connecticut Connecticut 11.8°C
34 Hadlyme, Connecticut River, Connecticut Connecticut 11.8°C
35 Lyme, highway bridge, Connecticut River, Connecticut Connecticut 11.8°C
36 Saybrook Jetty, Connecticut River, Connecticut Connecticut 11.8°C
37 Saybrook Point, Connecticut River, Connecticut Connecticut 11.8°C
38 Tylerville, Connecticut River, Connecticut Connecticut 11.8°C
39 Groton Connecticut 11.5°C
40 New London Connecticut 11.5°C
41 Niantic Connecticut 11.5°C
42 Ocean Beach Park Connecticut 11.5°C
43 Waterford Connecticut 11.5°C
44 New London, Thames River Connecticut 11.4°C
45 Norwich, Thames River, Connecticut Connecticut 11.4°C
46 Yale boathouse, Thames River, Connecticut Connecticut 11.4°C
47 Mystic Connecticut 11.3°C
48 Noank Connecticut 11.3°C
49 Stonington Connecticut 11.3°C
50 West Mystic, Mystic River, Long Island Sound Connecticut 11.2°C

Warmest 10 in Connecticut in May

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

# Location May mean
1 Byram Connecticut 14.4°C
2 Cos Cob Connecticut 14.4°C
3 Greenwich Connecticut 14.4°C
4 Old Greenwich Connecticut 14.4°C
5 Stamford Connecticut 14.4°C
6 Darien Connecticut 14.2°C
7 Fairfield Connecticut 14.2°C
8 Norwalk Connecticut 14.2°C
9 Westport Connecticut 14.2°C
10 Branford Connecticut 13.6°C

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