Measurements:
°C
°F
Boston
62°F
E 14 mph
Feels like: 62°F
Precip: 1%
World Resorts USA Boston Weather

Boston Sea Water Temperature

Current Sea Water Temperature:
+61.8°F
Maximum Sea Water Temperature in October: 66.2°F
Minimum Sea Water Temperature in October: 52.2°F
Average water temperature in October: 59.1°F

Sea Water Temperature for the Last 10 Days:

October 05 61.8°F September 30 61.2°F
October 04 63.4°F September 29 62.0°F
October 03 63.0°F September 28 62.4°F
October 02 60.2°F September 27 63.6°F
October 01 60.0°F September 26 62.6°F

When is the Warmest Sea for Boston?

According to our data for the last three years for Boston the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Boston was 70.4°F. The maximum and minimum values were 67.8°F and 73.8°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Boston was 69.0°F. The maximum and minimum values were 64.8°F and 73.2°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Boston was 66.3°F. The maximum and minimum values were 61.2°F and 70.8°F respectively.

Best Time to Visit Boston
The most sunny months:
August 16 days
July 15 days
November 14 days
The most warm months:
July 85.6 °F
August 84.0 °F
June 77.4 °F
Warmest sea temperature:
August 69.6 °F
July 68.7 °F
September 65.9 °F
The most cold months:
January 31.3 °F
February 32.9 °F
December 38.0 °F
The most rainy months:
April 5 days
June 4 days
October 4 days
The most windy months:
January 11 mph
March 11 mph
February 10 mph

Boston on the Weather Map

USA Resorts:
NAME
F°
Boston +62
Chicago +62
Hawaii +82
Houston +86
Las Vegas +96
Los Angeles +100
Maui +76
Miami +90
Myrtle Beach +74
New York +68
San Diego +88
San Francisco +68
Santa Monica +92
Sarasota +88
Washington +72
24 Hours Weather Forecast
Boston
Local time: 19:05
05 oct, monday
2100 58°F
SE
13 mph
06 oct, tuesday
0000 52°F
E
12 mph
0300 48°F
E
13 mph
0600 44°F
E
13 mph
0900 46°F
SE
14 mph
1200 56°F
SE
12 mph
1500 62°F
SE
12 mph
1800 58°F
SE
9 mph