Weather in Portsmouth: March
 |
Average day temperature: | 42.9°F |
| Average night temperature: | 32.9°F | |
 |
Sea water temperature: | 39.7°F |
 |
Number of sunny days: | 9 days |
| Day length: | 11.2 - 12.7 hours | |
 |
Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
| more information | ||
forecast
| Portsmouth |
temperature
| Portsmouth |
Air temperature in March, °F
The highest day temperature during March of 2025 was 55°F. At the same time the lowest night temperature was 9°F. Daily and nightly averages during March were 43.6°F and 31.9°F.
Sea water temperature in Portsmouth in March, °F
The average sea water temperature in March of 2025 was 38.3°F. The highest and lowest sea temperatures during the month were 39.9°F and 36.7°F.
Mostly all days in March are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in March, in.
Precipitation total value in Portsmouth in March is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in March is 9.7 mph It makes March most windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in March is: 6.0.
Best time for vacation in Portsmouth
Portsmouth on a weather map
11 mph
6 mph
6 mph
7 mph
10 mph
6 mph
6 mph
6 mph
