Boston in March
Find out everything about the water temperature in Boston in March. Average, minimum and maximum recorded temperatures as well as daily temperature in March for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in March
Minimum:
34.8 °F
Average:
39.6 °F
Maximum:
44.4 °F
Sea water temperature in Boston in March
In the city of Boston, the month of March is too cold for swimming. The minimum recorded temperature during this month was 34.8°F on March 8, 2021, with an average temperature being 39.6°F and a maximum temperature reaching 44.4°F on March 28, 2021.
| Date | 10 years average | 2025 | 2024 |
|---|---|---|---|
| Mar 1 | 38.4°F | 37.7°F | 38.4°F |
| Mar 2 | 38.4°F | 36.6°F | 39.3°F |
| Mar 3 | 38.3°F | 36.7°F | 39.1°F |
| Mar 4 | 38.3°F | 36.4°F | 38.2°F |
| Mar 5 | 38.6°F | 36.6°F | 40.9°F |
| Mar 6 | 38.5°F | 37.1°F | 40.5°F |
| Mar 7 | 38.5°F | 37.2°F | 39.6°F |
| Mar 8 | 38.3°F | 37.8°F | 39.4°F |
| Mar 9 | 38.5°F | 36.5°F | 40.9°F |
| Mar 10 | 38.8°F | 37.5°F | 38.8°F |
| Mar 11 | 38.9°F | 37.6°F | 40.5°F |
| Mar 12 | 39.0°F | 38.3°F | 39.9°F |
| Mar 13 | 39.4°F | 39.7°F | 40.7°F |
| Mar 14 | 39.4°F | 39.3°F | 40.6°F |
| Mar 15 | 39.5°F | 37.8°F | 41.0°F |
| Mar 16 | 39.4°F | 38.6°F | 40.9°F |
| Mar 17 | 39.8°F | 38.7°F | 43.2°F |
| Mar 18 | 39.8°F | 38.8°F | 43.6°F |
| Mar 19 | 40.0°F | 38.9°F | 43.8°F |
| Mar 20 | 40.1°F | 40.7°F | 42.6°F |
| Mar 21 | 40.0°F | 40.2°F | 42.2°F |
| Mar 22 | 40.5°F | 42.0°F | 41.7°F |
| Mar 23 | 40.5°F | 41.6°F | 41.4°F |
| Mar 24 | 40.6°F | 41.9°F | 41.2°F |
| Mar 25 | 40.4°F | 41.4°F | 40.9°F |
| Mar 26 | 40.5°F | 41.7°F | 40.6°F |
| Mar 27 | 40.8°F | 40.2°F | 41.1°F |
| Mar 28 | 41.2°F | 41.4°F | 41.0°F |
| Mar 29 | 41.2°F | 41.1°F | 41.1°F |
| Mar 30 | 41.3°F | 41.0°F | 40.9°F |
| Mar 31 | 41.6°F | 40.9°F | 42.2°F |
In an average year, Boston offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Boston was recorded on July 29, 2020, reaching a 75.0°F. While the coldest temperature occurred on February 11, 2025, dipping to 32.5°F. The average readings by season are 41.0°F in Winter, 45.4°F in Spring, 65.1°F in Summer, and 58.0°F in Autumn.
The average temperature in March is slightly warmer than February's average of 38.0°F. And in April, the temperature is expected to rise further, potentially reaching an average of 44.5°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| South Boston |
40.9°F
|
2mi |
| Salem |
41.9°F
|
14mi |
| Plymouth |
39.6°F
|
34mi |
| Providence |
37.1°F
|
41mi |
| Bristol |
36.4°F
|
48mi |
* current water temperature in this city
** straight line distance from Boston