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Coldest beach in Connecticut in October

61 coastal locations in Connecticut ranked by their typical October sea temperature. State-wide average in October: 18.5°C.

Coldest in October

West Mystic, Mystic River, Long Island Sound

17.6°C

State October average

18.5°C

across 61 coastal locations in Connecticut

Vs annual mean

+5.3°C

above the year-round state average

What the Connecticut water feels like in October

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.

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 October fits in the year

October 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 October 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 October

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

# Location October mean
1 Branford Connecticut 18.9°C
2 Bridgeport Connecticut 18.9°C
3 Milford Connecticut 18.9°C
4 Cos Cob Harbor, Connecticut Connecticut 18.9°C
5 East Norwalk Connecticut 18.9°C
6 Long Neck Point, Long Island Sound Connecticut 18.9°C
7 Mianus Connecticut 18.9°C
8 Rowayton, Fivemile River, Connecticut Connecticut 18.9°C
9 Saugatuck, Saugatuck River, Long Island Sound Connecticut 18.9°C
10 South Norwalk, Connecticut Connecticut 18.9°C
11 South Norwalk, Norwalk River Connecticut 18.9°C
12 Southport, Southport Harbor Connecticut 18.9°C
13 Stamford Harbor, Stamford Connecticut 18.9°C
14 Black Rock Harbor, Cedar Creek Connecticut 18.9°C
15 Gulf Beach, Connecticut Connecticut 18.9°C
16 Long Hill, Housatonic River, Connecticut Connecticut 18.9°C
17 Milford Harbor, Connecticut Connecticut 18.9°C
18 Shelton, Housatonic River, Connecticut Connecticut 18.9°C
19 Sniffens Point, Housatonic River, Connecticut Connecticut 18.9°C
20 Stratford, I-95 bridge, Housatonic River, Connecticut Connecticut 18.9°C
21 Clinton Connecticut 18.7°C
22 Guilford Connecticut 18.7°C
23 Hammonasset Beach Connecticut 18.7°C
24 Madison Connecticut 18.7°C
25 Woodmont Connecticut 18.7°C
Show 25 more ▸
26 Haddam, Connecticut River, Connecticut Connecticut 18.5°C
27 Old Lyme Connecticut 18.3°C
28 Old Saybrook Connecticut 18.3°C
29 Saybrook Manor Connecticut 18.3°C
30 Westbrook Connecticut 18.3°C
31 Great Captain Island Connecticut 18.1°C
32 East Haddam Connecticut 18.1°C
33 Essex, Connecticut River, Connecticut Connecticut 18.1°C
34 Hadlyme, Connecticut River, Connecticut Connecticut 18.1°C
35 Lyme, highway bridge, Connecticut River, Connecticut Connecticut 18.1°C
36 Saybrook Jetty, Connecticut River, Connecticut Connecticut 18.1°C
37 Saybrook Point, Connecticut River, Connecticut Connecticut 18.1°C
38 Tylerville, Connecticut River, Connecticut Connecticut 18.1°C
39 Groton Connecticut 18.0°C
40 New London Connecticut 18.0°C
41 Niantic Connecticut 18.0°C
42 Ocean Beach Park Connecticut 18.0°C
43 Waterford Connecticut 18.0°C
44 New London, Thames River Connecticut 17.8°C
45 Norwich, Thames River, Connecticut Connecticut 17.8°C
46 Yale boathouse, Thames River, Connecticut Connecticut 17.8°C
47 Mystic Connecticut 17.7°C
48 Noank Connecticut 17.7°C
49 Stonington Connecticut 17.7°C
50 West Mystic, Mystic River, Long Island Sound Connecticut 17.6°C

Warmest 10 in Connecticut in October

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

# Location October mean
1 Darien Connecticut 19.0°C
2 Fairfield Connecticut 19.0°C
3 Norwalk Connecticut 19.0°C
4 Westport Connecticut 19.0°C
5 Byram Connecticut 19.0°C
6 Cos Cob Connecticut 19.0°C
7 Greenwich Connecticut 19.0°C
8 Old Greenwich Connecticut 19.0°C
9 Stamford Connecticut 19.0°C
10 Branford Connecticut 18.9°C

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