Sea Temperature

Boston Sea Temperature

(Today) Sep 2019

18.8°C / 65.9°F

Current weather

15°C / 59°F
(clear sky)

Partly cloudy

8 mph



The measurements for the water temperature in Boston, 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 Boston water temperature derived from many years of historical sea surface temperature data.

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 1.7 3.6 5.9 11 15.9 18 15.9 11.2 8.9 5.3
Max °C 6.9 5 4.9 7.9 11.5 16.9 20.3 20.6 19.4 17.5 12.5 10.4
Min °F 39.2 36.9 36.3 40.2 44.9 54.1 62.4 65.4 62 54.6 49.5 43.5
Max °F 42.9 39.8 39.5 44.5 50.5 60 66.8 68 65.5 60.9 53.1 48.6

7 day tide forecast for Boston

  • High 1:49am
  • Low 7:55am
  • High 2:05pm
  • Low 8:17pm
  • High 2:28am
  • Low 8:33am
  • High 2:42pm
  • Low 8:59pm
  • High 3:09am
  • Low 9:14am
  • High 3:23pm
  • Low 9:43pm
  • High 3:53am
  • Low 9:58am
  • High 4:07pm
  • Low 10:31pm
  • High 4:43am
  • Low 10:46am
  • High 4:57pm
  • Low 11:25pm
  • High 5:38am
  • Low 11:41am
  • High 5:53pm
  • Low 12:23am
  • High 6:37am
  • Low 12:41pm
  • High 6:53pm

*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 September sea temperatures

  • Max: 19.4°C / 66.8°F
  • Avg: 17.6°C / 63.7°F
  • Min: 15.9°C / 60.5°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