Current sea water temperature:
+40.3°F
| Minimum sea water temperature in January: | 46.2°F |
| Maximum sea water temperature in January: | 35.2°F |
| Average sea water temperature in January: | 40.8°F |
| more information | |
14 days
forecast
forecast
| Boston |
monthly
weather
weather
| Boston |
Sea water temperature for the last 10 days:
| January 2 | 40.3°F | December 28 | 41.4°F |
| January 1 | 40.3°F | December 27 | 41.7°F |
| December 31 | 40.8°F | December 26 | 41.7°F |
| December 30 | 41.5°F | December 25 | 41.7°F |
| December 29 | 41.5°F | December 24 | 41.5°F |
Monthly sea water temperature, °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.
current
weather
weather
| Boston |
weather in
January
January
| Boston |
Best time for vacation in Boston
Boston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Boston
Local time: 06:44
January 02, friday
0900
19°F
NE
11 mph
11 mph
1200
28°F
E
12 mph
12 mph
1500
28°F
E
11 mph
11 mph
1800
28°F
E
9 mph
9 mph
2100
25°F
E
9 mph
9 mph
January 03, saturday
0000
23°F
E
9 mph
9 mph
0300
21°F
E
11 mph
11 mph
0600
21°F
E
11 mph
11 mph
