Weather in Portsmouth: March
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Average day temperature: | 43.2°F |
| Average night temperature: | 33.0°F | |
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Sea water temperature: | 39.4°F |
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Number of sunny days: | 10 days |
| Day length: | 11.2 - 12.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
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forecast
| Portsmouth |
temperature
| Portsmouth |
Air temperature in March, °F
The highest day temperature during March of 2026 was 77°F. At the same time the lowest night temperature was 11°F. Daily and nightly averages during March were 45.5°F and 33.5°F.
Sea water temperature in Portsmouth in March, °F
The average sea water temperature in March of 2026 was 37.5°F. The highest and lowest sea temperatures during the month were 39.0°F and 35.4°F.
Number of sunny, partly cloudy and cloudy days in March is almost equal.
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 9.6 mph It makes March one of the most windy months 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: 6.3.
Best time for vacation in Portsmouth
Portsmouth on a weather map
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