Cape Cod Water Temperature

(Today) 2024

19.7°C / 67.5°F

The water will feel tepid. Swimming will be tolerable without a wetsuit, although it will take a little getting used to. If you intend to stay in the water for a while a 3/2mm wetsuit will be ideal.

*Live data from Cape Cod Bay, MA (221): 16.7°C / 62.1°F

Current weather

22°C / 72°F
(broken clouds)
Partly cloudy
19 mph

The measurements for the water temperature in Cape Cod, Massachusetts are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Cape Cod water temperature derived from many years of historical sea surface temperature data.

Cape Cod average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Cape Cod
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.9 2 1.6 3.6 7.1 11 16.1 18.5 17.2 12.7 9.6 5.1
Max °C 7.4 4.9 5.7 9.7 13.3 18.6 21.9 21.9 20.3 18.9 13.9 11.4
Min °F 39 36.7 36.5 40.9 47.3 54.8 63.3 66.7 64.2 57.3 51 43.7
Max °F 43.5 39.6 40.6 47 53.5 62.4 69.1 70.1 67.3 63.5 55.3 50

The warmest water temperature is in August with an average around 68.4°F / 20.2°C. The coldest month is February with an average water temperature of 38.1°F / 3.4°C.

7 day tide forecast for Cape Cod

  • High 1:51am
  • Low 8:36am
  • High 2:32pm
  • Low 8:44pm
  • High 2:39am
  • Low 9:23am
  • High 3:21pm
  • Low 9:35pm
  • High 3:30am
  • Low 10:12am
  • High 4:11pm
  • Low 10:29pm
  • High 4:23am
  • Low 11:03am
  • High 5:03pm
  • Low 11:26pm
  • High 5:19am
  • Low 11:55am
  • High 5:57pm
  • Low 12:26am
  • High 6:18am
  • Low 12:51pm
  • High 6:51pm
  • Low 1:28am
  • High 7:19am
  • Low 1:47pm
  • High 7:47pm
7 day tide times for Cape Cod

*These tide times are estimates based on the nearest accurate location (Wychmere Harbor, Nantucket Sound, Massachusetts) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.