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Cape Cod Sea Temperature in October

Massachusetts, United States

September Cape Cod year-round → November

Average sea temperature for Cape Cod, United States across October, based on 10 years of daily readings.

Average

15.77° C

High

18.92° C

Low

12.27° C

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.

October is the 5th warmest of 12 months at Cape Cod. On average the water sits 3.9° than the year-round mean of 11.84° C.

Compared to September, October is 3.8° cooler than (19.62° C in September). By November the water is usually 11.29° C.

Cape Cod Day-by-Day Water Temperature in October

10-year low, average and high

11.0° C
13.3° C
15.5° C
17.8° C
20.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through October. Range Average

Each vertical bar above is one day of October. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Cape Cod.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

October Water Temperature Table for Cape Cod

10-year daily averages

Day Average Low High
October 1 17.67° C 16.38° C 18.92° C
October 2 17.51° C 16.36° C 18.75° C
October 3 17.34° C 15.54° C 18.51° C
October 4 17.21° C 15.18° C 18.49° C
October 5 17.16° C 15.04° C 18.22° C
October 6 17.19° C 15.15° C 18.17° C
October 7 17.19° C 15.24° C 18.2° C
October 8 17.07° C 15.15° C 18.27° C
October 9 16.89° C 14.98° C 18.14° C
October 10 16.6° C 14.84° C 18.31° C
October 11 16.39° C 14.07° C 18.29° C
October 12 16.26° C 14.17° C 18.03° C
October 13 16.14° C 14.44° C 17.79° C
October 14 15.98° C 14.47° C 18.06° C
October 15 15.84° C 14.37° C 18.2° C
October 16 15.69° C 14.08° C 18.11° C
October 17 15.56° C 13.81° C 17.97° C
October 18 15.41° C 13.36° C 17.74° C
October 19 15.22° C 13.37° C 17.21° C
October 20 15.17° C 13.35° C 16.61° C
October 21 15.13° C 13.31° C 16.64° C
October 22 15.06° C 13.32° C 16.76° C
October 23 14.97° C 13.57° C 16.72° C
October 24 14.86° C 13.5° C 16.48° C
October 25 14.75° C 13.26° C 16.32° C
October 26 14.65° C 12.93° C 16.15° C
October 27 14.45° C 12.72° C 15.82° C
October 28 14.24° C 12.53° C 15.89° C
October 29 14.02° C 12.44° C 15.69° C
October 30 13.73° C 12.31° C 15.12° C
October 31 13.65° C 12.27° C 14.84° C

Where October Sits in the Year

October highlighted

-3.0° C
4.5° C
12.0° C
19.5° C
27.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
4.36° C
3.1° C
4.03° C
6.91° C
11.19° C
16.63° C
20.64° C
21.33° C
19.62° C
15.77° C
11.29° C
7.18° C
10-year monthly history for Cape Cod. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in October

Compare other United States water for the same month

Cape Cod Location

41.6688, -70.2962

41.66879, -70.29624 View on OpenStreetMap →

Cape Cod sits at 41.6688°N, 70.2962°W, on the coast of Massachusetts, United States. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Cape Cod