Climate & Weather in Portsmouth

Portsmouth has a real, genuine coastal New England four-season climate, moderated by Aquidneck Island's bay and ocean proximity.

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Coastally moderated summers and winters

Portsmouth's Narragansett Bay and Sakonnet River proximity genuinely moderates both summer heat and winter cold relative to inland Rhode Island.

Real, recurring coastal storm risk

Hurricane and nor'easter risk runs real and significant, consistent with coastal Rhode Island's documented storm history.

A genuine four-season pattern

Portsmouth experiences a real, distinct New England four-season climate typical of coastal Rhode Island.

Key takeaways

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Last reviewed: 2026-08-28. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.