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Coldest beach in Massachusetts in October

222 coastal locations in Massachusetts ranked by their typical October sea temperature. State-wide average in October: 15.9°C.

Coldest in October

Merrimacport, Merrimack River

14.4°C

State October average

15.9°C

across 222 coastal locations in Massachusetts

Vs annual mean

+3.9°C

above the year-round state average

What the Massachusetts 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.

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 October fits in the year

October 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 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 Massachusetts beaches in October

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

# Location October mean
1 Amelia Earhart Dam, Mystic River, Boston Harbor Massachusetts 15.0°C
2 Beverly Massachusetts 15.0°C
3 Boston Light, Boston Harbor Massachusetts 15.0°C
4 Charlestown, Charles River entrance, Boston Harbor, Massachusetts Massachusetts 15.0°C
5 Chelsea St. Bridge, Chelsea River, Boston Harbor Massachusetts 15.0°C
6 Crow Point, Hingham Harbor entrance, Massachusetts Massachusetts 15.0°C
7 Deer Island (south end), Boston Harbor, Massachusetts Massachusetts 15.0°C
8 Hull, Massachusetts Massachusetts 15.0°C
9 Lovell Island Massachusetts 15.0°C
10 Lynn, Lynn Harbor Massachusetts 15.0°C
11 Moon Head, Boston Harbor, Massachusetts Massachusetts 15.0°C
12 Nantasket Beach, Weir River, Massachusetts Massachusetts 15.0°C
13 Neponset, Neponset River, Boston Harbor, Massachusetts Massachusetts 15.0°C
14 Nut Island, Quincy Bay Massachusetts 15.0°C
15 Plum Island Sound (south end) Massachusetts 15.0°C
16 Rainsford Island Massachusetts 15.0°C
17 Boston Harbor Massachusetts 15.0°C
18 Duxbury Beach Massachusetts 15.0°C
19 Duxbury Massachusetts 15.0°C
20 Hull Massachusetts 15.0°C
21 Humarock Massachusetts 15.0°C
22 Lynn Massachusetts 15.0°C
23 Marblehead Massachusetts 15.0°C
24 Marshfield Massachusetts 15.0°C
25 Nahant Beach Massachusetts 15.0°C
Show 25 more ▸
26 Nahant Massachusetts 15.0°C
27 Nantasket Beach Massachusetts 15.0°C
28 Ocean Bluff Brant Rock Massachusetts 15.0°C
29 Revere Beach Massachusetts 15.0°C
30 Rexhame Beach Massachusetts 15.0°C
31 Scituate Massachusetts 15.0°C
32 South Duxbury Massachusetts 15.0°C
33 Swampscott Massachusetts 15.0°C
34 Winthrop Massachusetts 15.0°C
35 Herring Cove Beach Massachusetts 14.8°C
36 North Truro Massachusetts 14.8°C
37 Provincetown Massachusetts 14.8°C
38 Race Point Beach Massachusetts 14.8°C
39 Truro Massachusetts 14.8°C
40 Annisquam, Lobster Cove, Massachusetts Massachusetts 14.7°C
41 Gloucester Massachusetts 14.5°C
42 Good Harbor Beach Massachusetts 14.5°C
43 Newburyport Massachusetts 14.5°C
44 Rockport Massachusetts 14.5°C
45 Salisbury Massachusetts 14.5°C
46 Wingaersheek Beach Massachusetts 14.5°C
47 Merrimacport, Merrimack River Massachusetts 14.4°C
48 Plum Island, Merrimack River Entrance, Merrimack River Massachusetts 14.4°C
49 Riverside, Merrimack River Massachusetts 14.4°C
50 Salisbury Point, Merrimack River Massachusetts 14.4°C

Warmest 10 in Massachusetts in October

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

# Location October mean
1 Aquinnah Massachusetts 17.5°C
2 Clarks Point, New Bedford, Buzzards Bay Massachusetts 17.4°C
3 Marion Center Massachusetts 17.4°C
4 Marion, Sippican Harbor, Buzzards Bay, Massachusetts Massachusetts 17.4°C
5 Mattapoisett, Mattapoisett Harbor, Buzzards Bay, Massachusetts Massachusetts 17.4°C
6 New Bedford, Buzzards Bay, Massachusetts Massachusetts 17.4°C
7 Round Hill Point, Buzzards Bay Massachusetts 17.4°C
8 South Dartmouth Massachusetts 17.4°C
9 West Island Massachusetts 17.4°C
10 Bliss Corner Massachusetts 17.3°C

Other US states

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