Monthly weather forecast and climate
Old Greenwich, CT

Average sea temperature - Old Greenwich, CT

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

Average daylight - Old Greenwich, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

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