Sea Temperature

Onset Sea Temperature

(Today) Sep 2018

19.4°C / 67°F

Current weather

21°C / 70°F
(scattered clouds)

Partly cloudy
Wind

23 mph

Humidity

83%


The measurements for the water temperature in Onset, 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.

Monthly average max / min water temperatures

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

Maximum and minimum monthly sea temperatures in Onset
  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

7 day tide forecast for Onset

SatSunMonTueWedThuFri
  • Low 02:45am
    (0.30m)
  • High 08:21am
    (3.39m)
  • Low 02:56pm
    (0.54m)
  • High 08:39pm
    (3.81m)
  • Low 03:19am
    (0.29m)
  • High 08:56am
    (3.57m)
  • Low 03:28pm
    (0.43m)
  • High 09:11pm
    (3.86m)
  • Low 03:49am
    (0.30m)
  • High 09:28am
    (3.74m)
  • Low 03:59pm
    (0.33m)
  • High 09:40pm
    (3.90m)
  • Low 04:10am
    (0.34m)
  • High 09:58am
    (3.89m)
  • Low 04:31pm
    (0.26m)
  • High 10:10pm
    (3.91m)
  • Low 04:02am
    (0.37m)
  • High 10:29am
    (4.04m)
  • Low 05:08pm
    (0.24m)
  • High 10:43pm
    (3.89m)
  • Low 04:18am
    (0.38m)
  • High 11:04am
    (4.16m)
  • Low 05:59pm
    (0.27m)
  • High 11:21pm
    (3.84m)
  • Low 04:46am
    (0.42m)
  • High 11:43am
    (4.24m)
  • Low 07:06pm
    (0.31m)

*These tide times are estimates based on the nearest port (Cape Cod Canal, Buzzards Bay Entrance) and may differ by up to half and hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.

Average September sea temperatures

  • Max: 20.3°C / 68.5°F
  • Avg: 18.7°C / 65.7°F
  • Min: 17.2°C / 62.9°F
Onset average sea temperature chart

These average ocean temperatures for Onset are calculated from several years of archived data.

Map showing location of Onset (41.741770, -70.657810)

Locations nearby

Variations

Whilst sea temperatures for Onset are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.

Alternate names for Onset

Onset average sea temperature chart