Weather in Nantucket: March
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Average day temperature: | 40.4°F |
| Average night temperature: | 39.3°F | |
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Sea water temperature: | 40.6°F |
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Number of sunny days: | 8 days |
| Day length: | 11.3 - 12.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.1 in. | |
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Air temperature in March, °F
| Day temperature | Night temperature |
The highest day temperature during March of 2025 was 48°F. At the same time the lowest night temperature was 23°F. Daily and nightly averages during March were 40.7°F and 38.9°F.
Sea water temperature in Nantucket in March, °F
The average sea water temperature in March of 2025 was 39.7°F. The highest and lowest sea temperatures during the month were 43.3°F and 36.1°F.
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| Partly cloudy days | |
| Cloudy days |
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 Nantucket in March is 1.1 in. Other months of the year show relatively similar values.
The average wind speed value in March is 19.1 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: 5.6.
Best time for vacation in Nantucket
Nantucket on a weather map
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