Sea Temperature

Boston Sea Temperature

(Today) Dec 2017

8.9°C / 48°F

Current weather

(overcast clouds)
-6°C / 21°F

Partly cloudy

11 mph



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

Monthly average max / min water temperatures

The graph below shows the range of monthly water temperatures over several years.

Maximum and minimum monthly sea temperatures in Boston
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.2 2 1.9 3.6 6.7 11.5 16.5 18.6 16.6 12.2 9.4 5.3
Max °C 7.1 4.8 5.2 8.7 12.4 17.8 20.9 21.3 19.8 18.2 13.2 10.9
Min °F 39.3 36.7 36.7 40.5 46.3 55.2 63.5 66.5 63.2 56.4 50.4 43.8
Max °F 43.2 39.5 40 45.6 52 61.5 67.9 69.2 66.4 62.4 54.2 49.4

7 day tide forecast for Boston

  • Low 03:30am
  • High 09:47am
  • Low 04:07pm
  • High 10:21pm
  • Low 04:11am
  • High 10:27am
  • Low 04:47pm
  • High 11:01pm
  • Low 04:51am
  • High 11:05am
  • Low 05:26pm
  • High 11:40pm
  • Low 05:31am
  • High 11:43am
  • Low 06:04pm
  • High 12:18am
  • Low 06:11am
  • High 12:21pm
  • Low 06:43pm
  • High 12:58am
  • Low 06:52am
  • High 01:01pm
  • Low 07:23pm
  • High 01:38am
  • Low 07:34am
  • High 01:42pm
  • Low 08:04pm

*These tide times are estimates based on the nearest port (Boston, Massachusetts) 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 December sea temperatures

  • Max: 5.3°C / 41.5°F
  • Avg: 8.1°C / 46.6°F
  • Min: 10.9°C / 51.6°F
Boston average sea temperature chart

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

Map showing location of Boston (42.358430, -71.059770)

Locations nearby


Whilst sea temperatures for Boston 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 Boston
BOS, Boston, Bostona, Bostonas, Bostone, Bostonia, Bostono, Bostun, Bostún, Gorad Bostan, Pokekona, Vostoni, bastan, bastana, bo shi dun, boseuteon, bostan, bostana, bosuton, bwstn, bwstwn, bxstan, pastan, Βοστωνη, Βοστώνη, Бостон, Бостън, Горад Бостан, Բոստոն, באסטאן, בוסטון, بوستون, بوسطن, بوسٹن, ܒܘܣܛܘܢ, बॉस्टन, बोस्टन, বস্টন, பாஸ்டன், బోస్టన్, ಬಾಸ್ಟನ್, ബോസ്റ്റണ്‍, บอสตัน, བོ་སེ་ཊོན།, ბოსტონი, ボストン, 波士顿, 보스턴

Boston average sea temperature chart