Boston in August
Find out everything about the water temperature in Boston in August. Average, minimum and maximum recorded temperatures as well as daily temperature in August for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in August
Minimum:
63.0 °F
Average:
67.8 °F
Maximum:
74.4 °F
Sea water temperature in Boston in August
In the city of Boston, the month of August is somewhat comfortable for swimming. The minimum recorded temperature during this month was 63.0°F on August 5, 2023, with an average temperature being 67.8°F and a maximum temperature reaching 74.4°F on August 1, 2020.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Aug 1 | 68.4°F | 64.4°F | 66.3°F |
| Aug 2 | 68.2°F | 64.8°F | 65.8°F |
| Aug 3 | 68.1°F | 67.3°F | 64.6°F |
| Aug 4 | 68.0°F | 67.8°F | 64.2°F |
| Aug 5 | 67.9°F | 70.3°F | 63.0°F |
| Aug 6 | 68.0°F | 69.2°F | 64.5°F |
| Aug 7 | 67.9°F | 68.0°F | 64.3°F |
| Aug 8 | 67.8°F | 66.9°F | 67.1°F |
| Aug 9 | 67.9°F | 65.0°F | 67.4°F |
| Aug 10 | 68.1°F | 65.2°F | 64.8°F |
| Aug 11 | 67.7°F | 64.8°F | 64.8°F |
| Aug 12 | 68.0°F | 65.0°F | 65.0°F |
| Aug 13 | 68.1°F | 65.2°F | 64.1°F |
| Aug 14 | 68.0°F | 65.1°F | 65.5°F |
| Aug 15 | 67.9°F | 65.0°F | 65.2°F |
| Aug 16 | 67.7°F | 67.3°F | 64.9°F |
| Aug 17 | 67.4°F | 66.1°F | 64.8°F |
| Aug 18 | 67.3°F | 66.5°F | 64.2°F |
| Aug 19 | 67.4°F | 66.5°F | 65.9°F |
| Aug 20 | 67.1°F | 66.2°F | 64.1°F |
| Aug 21 | 67.7°F | 67.3°F | 64.6°F |
| Aug 22 | 67.5°F | 65.2°F | 65.6°F |
| Aug 23 | 67.2°F | 64.1°F | 65.2°F |
| Aug 24 | 66.7°F | 64.7°F | 65.7°F |
| Aug 25 | 67.2°F | 66.2°F | 64.7°F |
| Aug 26 | 67.8°F | 66.5°F | 64.3°F |
| Aug 27 | 68.2°F | 66.5°F | 65.2°F |
| Aug 28 | 68.5°F | 66.6°F | 67.2°F |
| Aug 29 | 68.4°F | 68.0°F | 66.6°F |
| Aug 30 | 68.3°F | 67.6°F | 66.2°F |
| Aug 31 | 67.9°F | 65.2°F | 65.7°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 22, 2021, dipping to 33.7°F. The average readings by season are 41.3°F in Winter, 44.9°F in Spring, 64.8°F in Summer, and 58.0°F in Autumn.
In August, the temperature is higher than July's average of 66.5°F and September's average of 64.9°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| South Boston |
49.4°F
|
2mi |
| Salem |
50.0°F
|
14mi |
| Plymouth |
50.8°F
|
34mi |
| Providence |
51.2°F
|
41mi |
| Bristol |
51.5°F
|
48mi |
* current water temperature in this city
** straight line distance from Boston