Block Island Beach Water Temperature
Sea-surface temperature at Block Island Beach, Rhode Island · times in EDT
Updated 4:00 AM EDT
How it compares today
Water temperature through the year
Monthly normals computed from 2023–2025 daily sea-surface temperature history.
Nearby water right now
7-day outlook
| Day | Air high / low | Max UV | Rain |
|---|---|---|---|
| Tue, Oct 13 | 64° / 58° | 3 | 8% |
| Wed, Oct 14 | 71° / 60° | 5 | 25% |
| Thu, Oct 15 | 62° / 51° | 5 | 3% |
| Fri, Oct 16 | 65° / 55° | 2 | 82% |
| Sat, Oct 17 | 54° / 37° | 4 | 28% |
| Sun, Oct 18 | 54° / 33° | 4 | 1% |
| Mon, Oct 19 | 57° / 43° | 4 | 2% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is Block Island Beach warm enough to swim?
At 64°F, the water at Block Island Beach is chilly — wetsuit recommended. Most swimmers are comfortable without a wetsuit above 72°F; below 62°F, cold-water shock becomes a real risk for unprotected swimmers.
That is 1° above the October average of 63°F here.
The water averages above 70°F in July and August — 2 months of the year — peaking around 72°F in July and dropping to about 41°F in February.
Frequently asked questions
How warm is the water at Block Island Beach right now?
The sea-surface temperature is about 64°F. That is 1° above the October average of 63°F here.
When is the water warm enough to swim at Block Island Beach?
The water averages above 70°F in July and August — 2 months of the year — peaking around 72°F in July and dropping to about 41°F in February.
What is the warmest the water gets at Block Island Beach?
Around 72°F in July, based on 2023–2025 records. The coolest month is February at roughly 41°F.