March weather forecast and climate
Jamestown, RI

Average sea temperature in March - Jamestown, RI
  • Average sea temperature in March: 38.9°F

The best month for swimming (with the highest average sea temperature) is August (69.6°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

Average daylight in March - Jamestown, RI
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

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