World Resorts USA Boston Weather

Boston sea water temperature

Current sea water temperature:
+34.3°F
Minimum sea water temperature in February: 42.1°F
Maximum sea water temperature in February: 31.6°F
Average sea water temperature in February: 38.1°F

Sea water temperature for the last 10 days:

February 4 34.3°F January 30 33.1°F
February 3 32.4°F January 29 35.1°F
February 2 32.7°F January 28 35.1°F
February 1 31.6°F January 27 36.1°F
January 31 33.1°F January 26 36.7°F

When is the warmest sea in Boston?

Based on the data about daily sea water temperature for the last three years the warmest sea in Boston was noticed in August, July and September.

Monthly Sea Temperatures in Boston, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 67.2°F. The highest and lowest sea temperatures during the month were 70.5°F and 64.9°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 67.1°F. The highest and lowest sea temperatures during the month were 70.0°F and 63.7°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 63.7°F. The highest and lowest sea temperatures during the month were 66.7°F and 60.1°F.

Best time for vacation in Boston

Sunniest months:
August 16 days
July 15 days
November 14 days
Warmest months:
July 81.9 °F
August 80.3 °F
June 74.2 °F
Warmest sea temp:
August 67.6 °F
July 66.8 °F
September 64.3 °F
Coldest months:
January 33.2 °F
February 34.8 °F
December 39.2 °F
Rainiest months:
April 5 days
May 4 days
October 4 days
Windiest months:
January 10.7 mph
March 10.7 mph
February 10.5 mph

Boston on a weather map

Boston
+27°F
E 5 mph
Feels like: +19°F
Precip.: 0%
Places in USA:
Name
°F
+32°F
+75°F
+75°F
+81°F
+91°F
+73°F
+70°F
+72°F
+27°F
+84°F
+70°F
+66°F
+68°F
+63°F
+25°F
24 Hours Forecast
Boston
Local time: 16:55
February 04, wednesday
1800
27°F
E
5 mph
2100
14°F
E
6 mph
February 05, thursday
0000
9°F
E
5 mph
0300
7°F
E
5 mph
0600
10°F
E
4 mph
0900
16°F
E
5 mph
1200
27°F
SE
7 mph
1500
28°F
SE
7 mph
Units of measurement: °C / °F