Sea temperature in Boston in the United States (USA) real-time sea temperature, 7-day forecast and historical data

Temperature of the sea in Boston today

Currently, the sea water temperature in Boston is at most:

65°F

(or 1° lower than the seasonal norm)

Other useful information about today's weather:

• Outside temperature: 67°F to 74°F
• Partly Cloudy
• The wind is blowing at 12.4mph
• Wave height is 1.3ft on average, and 2.3ft at most, with a frequency of a wave every 10.1 seconds.
• More details on the sea weather of Boston page

This report was generated on 12/07/2025

7 day sea water temperature forecast in Boston

Discover the weather forecast for the water temperature in Boston for the next 7 days below. You will also find the 7-day forecast for outside temperature and wave height. For more details, hour by hour, see the chart below the listing.

Saturday 12 July 2025

sea temperature:
65°F

Wave height: 0.7ft to 2.6ft

Outside temperature: 67°F to 74°F

Sunday 13 July 2025

sea temperature:
65°F

Wave height: 1ft to 2.3ft

Outside temperature: 65°F to 72°F

Monday 14 July 2025

sea temperature:
65°F

Wave height: 1ft to 1.6ft

Outside temperature: 67°F to 77°F

Tuesday 15 July 2025

sea temperature:
65°F

Wave height: 0.7ft to 1.3ft

Outside temperature: 70°F to 79°F

Wednesday 16 July 2025

sea temperature:
65°F

Wave height: 0.7ft to 2.3ft

Outside temperature: 68°F to 79°F

Thursday 17 July 2025

sea temperature:
65°F

Wave height: 1ft to 2ft

Outside temperature: 72°F to 83°F

Friday 18 July 2025

sea temperature:
65°F

Wave height: 1ft to 2ft

Outside temperature: 72°F to 79°F

Chart of water temperature variation over 7 days

History of water temperature in Boston

We record the water temperature daily in Boston In this way, we can provide you with the average sea temperature in Boston over the last 24 months and a more detailed chart for recent months.

Monthly sea temperature averages over 24 months

july 2025

Average water temperature: 64°F (61°F to 65°F)

june 2025

Average water temperature: 58°F (50°F to 63°F)

may 2025

Average water temperature: 49°F (43°F to 54°F)

april 2025

Average water temperature: 41°F (38°F to 47°F)

march 2025

Average water temperature: 37°F (34°F to 41°F)

february 2025

Average water temperature: 38°F (34°F to 40°F)

january 2025

Average water temperature: 41°F (36°F to 43°F)

december 2024

Average water temperature: 46°F (41°F to 49°F)

november 2024

Average water temperature: 51°F (47°F to 54°F)

october 2024

Average water temperature: 58°F (52°F to 61°F)

september 2024

Average water temperature: 62°F (58°F to 67°F)

august 2024

Average water temperature: 65°F (63°F to 67°F)

july 2024

Average water temperature: 64°F (59°F to 66°F)

june 2024

Average water temperature: 60°F (54°F to 63°F)

may 2024

Average water temperature: 50°F (43°F to 58°F)

april 2024

Average water temperature: 42°F (38°F to 45°F)

march 2024

Average water temperature: 38°F (36°F to 41°F)

february 2024

Average water temperature: 39°F (34°F to 40°F)

january 2024

Average water temperature: 42°F (36°F to 45°F)

december 2023

Average water temperature: 46°F (40°F to 50°F)

november 2023

Average water temperature: 53°F (49°F to 58°F)

october 2023

Average water temperature: 58°F (54°F to 63°F)

september 2023

Average water temperature: 65°F (59°F to 68°F)

august 2023

Average water temperature: 66°F (63°F to 69°F)

Variation of water temperature in Boston over the past 2 months