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Warmest beach in Massachusetts in September

222 coastal locations in Massachusetts ranked by their typical September sea temperature. State-wide average in September: 19.3°C.

Warmest in September

Clarks Point, New Bedford, Buzzards Bay

21.1°C

State September average

19.3°C

across 222 coastal locations in Massachusetts

Vs annual mean

+7.3°C

above the year-round state average

What the Massachusetts water feels like in September

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.

Massachusetts monthly average 3.8°C to 20.8°C
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  • Warmest month August 20.8°C
  • Coldest month February 3.8°C
  • Annual mean 12.0°C
  • Months above 20°C 2 of 12

Where September fits in the year

September sits inside the state pattern shown on the left. Browse a different month for a fresh ranking.

Massachusetts sea temperature map (live)

Today's reading at every Massachusetts beach we track. The list below uses the typical September 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 warmest Massachusetts beaches in September

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

# Location September mean
1 Clarks Point, New Bedford, Buzzards Bay Massachusetts 21.1°C
2 Marion Center Massachusetts 21.1°C
3 Marion, Sippican Harbor, Buzzards Bay, Massachusetts Massachusetts 21.1°C
4 Mattapoisett, Mattapoisett Harbor, Buzzards Bay, Massachusetts Massachusetts 21.1°C
5 New Bedford, Buzzards Bay, Massachusetts Massachusetts 21.1°C
6 Round Hill Point, Buzzards Bay Massachusetts 21.1°C
7 South Dartmouth Massachusetts 21.1°C
8 West Island Massachusetts 21.1°C
9 Aquinnah Massachusetts 20.9°C
10 Abiels Ledge Massachusetts 20.6°C
11 Barlows Landing Massachusetts 20.6°C
12 Cape Cod Canal, RR. bridge, Buzzards Bay Massachusetts 20.6°C
13 Cape Cod Canal (Sta. 320), Bourne Bridge, Cape Cod Bay Massachusetts 20.6°C
14 Cedar Tree Neck, Martha's Vineyard, Massachusetts Massachusetts 20.6°C
15 Chapoquoit Point, West Falmouth Harbor, Buzzards Bay Massachusetts 20.6°C
16 East Chop Massachusetts 20.6°C
17 Falmouth Heights, Nantucket Sound, Massachusetts Massachusetts 20.6°C
18 Gray Gables, Buzzards Bay Massachusetts 20.6°C
19 Great Hill, Buzzards Bay Massachusetts 20.6°C
20 Great Hill Point Massachusetts 20.6°C
21 Little Harbor, Woods Hole, Massachusetts Massachusetts 20.6°C
22 Martha's Vineyard GPS buoy, Martha's Vineyard Massachusetts 20.6°C
23 Monument Beach, Buzzards Bay, Massachusetts Massachusetts 20.6°C
24 Nobska Beach Massachusetts 20.6°C
25 Oak Bluffs, Martha's Vineyard, Massachusetts Massachusetts 20.6°C
Show 25 more ▸
26 Piney Point, Buzzards Bay Massachusetts 20.6°C
27 South Beach (Martha's Vineyard) Massachusetts 20.6°C
28 Uncatena Island (south side), Woods Hole, Massachusetts Massachusetts 20.6°C
29 Vineyard Haven Harbor, Vineyard Haven Massachusetts 20.6°C
30 West Chop Massachusetts 20.6°C
31 Cuttyhunk, Massachusetts Massachusetts 20.6°C
32 Gay Head, Martha's Vineyard, Massachusetts Massachusetts 20.6°C
33 Kettle Cove Massachusetts 20.6°C
34 Menemsha Bight Massachusetts 20.6°C
35 Menemsha Harbor Massachusetts 20.6°C
36 Nomans Land, Martha's Vineyard, Massachusetts Massachusetts 20.6°C
37 Penikese Island, Buzzards Bay Massachusetts 20.6°C
38 Quicks Hole, North side, Massachusetts Massachusetts 20.6°C
39 Squibnocket Point, Martha's Vineyard, Massachusetts Massachusetts 20.6°C
40 Tarpaulin Cove Massachusetts 20.6°C
41 Bourne Massachusetts 20.5°C
42 Buzzards Bay Massachusetts 20.5°C
43 East Falmouth Massachusetts 20.5°C
44 Falmouth Massachusetts 20.5°C
45 Monument Beach Massachusetts 20.5°C
46 North Falmouth Massachusetts 20.5°C
47 Old Silver Beach Massachusetts 20.5°C
48 Onset Massachusetts 20.5°C
49 Pocasset Massachusetts 20.5°C
50 South Cape Beach Massachusetts 20.5°C

Coldest 10 in Massachusetts in September

Same data the other way.

# Location September mean
1 Tom Nevers Beach Massachusetts 17.8°C
2 Merrimacport, Merrimack River Massachusetts 17.8°C
3 Plum Island, Merrimack River Entrance, Merrimack River Massachusetts 17.8°C
4 Riverside, Merrimack River Massachusetts 17.8°C
5 Salisbury Point, Merrimack River Massachusetts 17.8°C
6 Gloucester Massachusetts 17.9°C
7 Good Harbor Beach Massachusetts 17.9°C
8 Newburyport Massachusetts 17.9°C
9 Rockport Massachusetts 17.9°C
10 Salisbury Massachusetts 17.9°C

Other US states

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