Nantucket Water Temperature

(Today) 2024

12.9°C / 55.3°F

The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.

Current weather

11°C / 51°F
(overcast clouds)
Partly cloudy
Wind
23 mph
Humidity
90%

The measurements for the water temperature in Nantucket, 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.

Water temp by month

Monthly average max / min water temperatures

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

Nantucket average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Nantucket
  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 Nantucket

SatSunMonTueWedThuFri
  • Low 3:00am
    (0.18m)
  • High 9:21am
    (0.83m)
  • Low 3:09pm
    (0.18m)
  • High 9:44pm
    (0.92m)
  • Low 3:54am
    (0.15m)
  • High 10:12am
    (0.8m)
  • Low 3:53pm
    (0.2m)
  • High 10:25pm
    (0.96m)
  • Low 4:42am
    (0.11m)
  • High 11:02am
    (0.79m)
  • Low 4:33pm
    (0.21m)
  • High 11:05pm
    (0.99m)
  • Low 5:24am
    (0.07m)
  • High 11:50am
    (0.77m)
  • Low 5:11pm
    (0.22m)
  • High 11:45pm
    (1.02m)
  • Low 6:03am
    (0.04m)
  • High 12:36pm
    (0.77m)
  • Low 5:48pm
    (0.22m)
  • High 12:26am
    (1.05m)
  • Low 6:42am
    (0.01m)
  • High 1:21pm
    (0.76m)
  • Low 6:26pm
    (0.22m)
  • High 1:06am
    (1.08m)
  • Low 7:22am
    (-0.01m)
  • High 2:04pm
    (0.76m)
  • Low 7:06pm
    (0.21m)
7 day tide times for Nantucket

*These tide times are estimates based on the nearest accurate location (Nantucket, Nantucket Island, 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.