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Coldest beach in Connecticut in March

61 coastal locations in Connecticut ranked by their typical March sea temperature. State-wide average in March: 4.3°C.

Coldest in March

Darien

3.8°C

State March average

4.3°C

across 61 coastal locations in Connecticut

Vs annual mean

-8.9°C

below the year-round state average

What the Connecticut water feels like in March

Water at this temperature is freezing cold, can cause pain and takes your breath away. Unless you are very experienced and are under strict supervision, swimming in this water for more than a few minutes can be very dangerous. Be careful, stay safe, and enjoy the rush of endorphins and exhilaration from a brief cold water swim.

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 March fits in the year

March 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 March 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 March

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

# Location March mean
1 Groton Connecticut 4.8°C
2 New London Connecticut 4.8°C
3 East Haddam Connecticut 4.7°C
4 Essex, Connecticut River, Connecticut Connecticut 4.7°C
5 Hadlyme, Connecticut River, Connecticut Connecticut 4.7°C
6 Lyme, highway bridge, Connecticut River, Connecticut Connecticut 4.7°C
7 Saybrook Jetty, Connecticut River, Connecticut Connecticut 4.7°C
8 Saybrook Point, Connecticut River, Connecticut Connecticut 4.7°C
9 Tylerville, Connecticut River, Connecticut Connecticut 4.7°C
10 Old Lyme Connecticut 4.5°C
11 Old Saybrook Connecticut 4.5°C
12 Saybrook Manor Connecticut 4.5°C
13 Westbrook Connecticut 4.5°C
14 Haddam, Connecticut River, Connecticut Connecticut 4.3°C
15 Cos Cob Harbor, Connecticut Connecticut 4.1°C
16 East Norwalk Connecticut 4.1°C
17 Long Neck Point, Long Island Sound Connecticut 4.1°C
18 Mianus Connecticut 4.1°C
19 Rowayton, Fivemile River, Connecticut Connecticut 4.1°C
20 Saugatuck, Saugatuck River, Long Island Sound Connecticut 4.1°C
21 South Norwalk, Connecticut Connecticut 4.1°C
22 South Norwalk, Norwalk River Connecticut 4.1°C
23 Southport, Southport Harbor Connecticut 4.1°C
24 Stamford Harbor, Stamford Connecticut 4.1°C
25 Black Rock Harbor, Cedar Creek Connecticut 4.1°C
Show 25 more ▸
26 Gulf Beach, Connecticut Connecticut 4.1°C
27 Long Hill, Housatonic River, Connecticut Connecticut 4.1°C
28 Milford Harbor, Connecticut Connecticut 4.1°C
29 Shelton, Housatonic River, Connecticut Connecticut 4.1°C
30 Sniffens Point, Housatonic River, Connecticut Connecticut 4.1°C
31 Stratford, I-95 bridge, Housatonic River, Connecticut Connecticut 4.1°C
32 Clinton Connecticut 4.0°C
33 Guilford Connecticut 4.0°C
34 Hammonasset Beach Connecticut 4.0°C
35 Madison Connecticut 4.0°C
36 Woodmont Connecticut 4.0°C
37 Byram Connecticut 3.8°C
38 Cos Cob Connecticut 3.8°C
39 Greenwich Connecticut 3.8°C
40 Old Greenwich Connecticut 3.8°C
41 Stamford Connecticut 3.8°C
42 Branford Connecticut 3.8°C
43 Bridgeport Connecticut 3.8°C
44 Milford Connecticut 3.8°C
45 New Haven Connecticut 3.8°C
46 West Haven Connecticut 3.8°C
47 Darien Connecticut 3.8°C
48 Fairfield Connecticut 3.8°C
49 Norwalk Connecticut 3.8°C
50 Westport Connecticut 3.8°C

Warmest 10 in Connecticut in March

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

# Location March mean
1 Great Captain Island Connecticut 5.8°C
2 West Mystic, Mystic River, Long Island Sound Connecticut 5.2°C
3 Mystic Connecticut 5.0°C
4 Noank Connecticut 5.0°C
5 Stonington Connecticut 5.0°C
6 New London, Thames River Connecticut 5.0°C
7 Norwich, Thames River, Connecticut Connecticut 5.0°C
8 Yale boathouse, Thames River, Connecticut Connecticut 5.0°C
9 Groton Connecticut 4.8°C
10 New London Connecticut 4.8°C

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