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Warmest beach in Connecticut

61 coastal locations in Connecticut ranked by year-round average sea temperature. The state-wide average is 13.2°C. The peak month is August at 23.3°C. Click any beach for its 30-day chart and 10-year history.

Warmest year-round

Great Captain Island

13.9°C annual mean

State-wide average

13.2°C

across 61 Connecticut coastal locations

Warmest month

August

23.3°C state-wide average

What the water feels like at peak in August

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

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

Month by month around the Connecticut coast

Connecticut sea temperatures swing from 3.1°C in February to 23.3°C in August on average across the coast. That's a spread of 20°C. Pick a single month for a focused ranking:

Connecticut sea temperature map

Today's pin colours show the latest daily reading at every Connecticut 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 warmest beaches in Connecticut

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

# Location Annual mean
1 Great Captain Island Connecticut 13.9°C
2 Byram Connecticut 13.6°C
3 Cos Cob Connecticut 13.6°C
4 Greenwich Connecticut 13.6°C
5 Old Greenwich Connecticut 13.6°C
6 Stamford Connecticut 13.6°C
7 Darien Connecticut 13.6°C
8 Fairfield Connecticut 13.6°C
9 Norwalk Connecticut 13.6°C
10 Westport Connecticut 13.6°C
11 Cos Cob Harbor, Connecticut Connecticut 13.4°C
12 East Norwalk Connecticut 13.4°C
13 Long Neck Point, Long Island Sound Connecticut 13.4°C
14 Mianus Connecticut 13.4°C
15 Rowayton, Fivemile River, Connecticut Connecticut 13.4°C
16 Saugatuck, Saugatuck River, Long Island Sound Connecticut 13.4°C
17 South Norwalk, Connecticut Connecticut 13.4°C
18 South Norwalk, Norwalk River Connecticut 13.4°C
19 Southport, Southport Harbor Connecticut 13.4°C
20 Stamford Harbor, Stamford Connecticut 13.4°C
21 Branford Connecticut 13.4°C
22 Bridgeport Connecticut 13.4°C
23 Milford Connecticut 13.4°C
24 New Haven Connecticut 13.4°C
25 West Haven Connecticut 13.4°C
Show 25 more ▸
26 Black Rock Harbor, Cedar Creek Connecticut 13.4°C
27 Gulf Beach, Connecticut Connecticut 13.4°C
28 Long Hill, Housatonic River, Connecticut Connecticut 13.4°C
29 Milford Harbor, Connecticut Connecticut 13.4°C
30 Shelton, Housatonic River, Connecticut Connecticut 13.4°C
31 Sniffens Point, Housatonic River, Connecticut Connecticut 13.4°C
32 Stratford, I-95 bridge, Housatonic River, Connecticut Connecticut 13.4°C
33 Clinton Connecticut 13.1°C
34 Guilford Connecticut 13.1°C
35 Hammonasset Beach Connecticut 13.1°C
36 Madison Connecticut 13.1°C
37 Woodmont Connecticut 13.1°C
38 Haddam, Connecticut River, Connecticut Connecticut 13.1°C
39 East Haddam Connecticut 13.0°C
40 Essex, Connecticut River, Connecticut Connecticut 13.0°C
41 Hadlyme, Connecticut River, Connecticut Connecticut 13.0°C
42 Lyme, highway bridge, Connecticut River, Connecticut Connecticut 13.0°C
43 Saybrook Jetty, Connecticut River, Connecticut Connecticut 13.0°C
44 Saybrook Point, Connecticut River, Connecticut Connecticut 13.0°C
45 Tylerville, Connecticut River, Connecticut Connecticut 13.0°C
46 Old Lyme Connecticut 13.0°C
47 Old Saybrook Connecticut 13.0°C
48 Saybrook Manor Connecticut 13.0°C
49 Westbrook Connecticut 13.0°C
50 West Mystic, Mystic River, Long Island Sound Connecticut 13.0°C

Coldest 10 in Connecticut

Same data, sorted the other way.

# Location Annual mean
1 Groton Connecticut 12.9°C
2 New London Connecticut 12.9°C
3 Niantic Connecticut 12.9°C
4 Ocean Beach Park Connecticut 12.9°C
5 Waterford Connecticut 12.9°C
6 Mystic Connecticut 12.9°C
7 Noank Connecticut 12.9°C
8 Stonington Connecticut 12.9°C
9 New London, Thames River Connecticut 12.9°C
10 Norwich, Thames River, Connecticut Connecticut 12.9°C

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