Current sea water temperature:
+46.4°F
| Minimum sea water temperature in April: | 50.2°F |
| Maximum sea water temperature in April: | 36.9°F |
| Average sea water temperature in April: | 44.0°F |
| more information | |
14 days
forecast
forecast
| Boston |
monthly
weather
weather
| Boston |
Sea water temperature for the last 10 days:
| April 26 | 46.4°F | April 21 | 45.7°F |
| April 25 | 45.7°F | April 20 | 46.6°F |
| April 24 | 46.9°F | April 19 | 46.9°F |
| April 23 | 45.3°F | April 18 | 46.9°F |
| April 22 | 45.9°F | April 17 | 45.7°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
April
April
| Boston |
Best time for vacation in Boston
Boston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Boston
Local time: 15:31
April 26, sunday
1800
55°F
W
6 mph
6 mph
2100
46°F
NW
4 mph
4 mph
April 27, monday
0000
45°F
SW
2 mph
2 mph
0300
43°F
SW
4 mph
4 mph
0600
45°F
S
5 mph
5 mph
0900
52°F
SW
7 mph
7 mph
1200
57°F
SW
9 mph
9 mph
1500
57°F
SW
10 mph
10 mph
