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Block Island Surf Forecast
/ Rhode Island (33 breaks) / Rhode Island (34 breaks) /
Surf Forecasts:
Block Island surfForecast / Rhode Island / USA
48hr Weather and Surf, issued 7 am Monday 18 May 2026 EDTForecast update in hr min s Forecast update imminent
Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Block Island sea temperature is
9.9° C
(Which is 1.2°C colder than average for this time of year)How big are the waves at Block Island today?
The current surf forecast for Block Island at 11AM is: 0.7m 8s primary swell from a South-southeast direction and 0.7m 6s secondary swell from a Southwest direction (forecast issued at 07:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 8s |
| Afternoon (18 May) | 2.5ft (0.7m) | 7s |
| Evening (18 May) | 3.5ft (1.0m) | 5s |
Table - waves today at Block Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Wed night. Warm (max 22°C on Mon afternoon, min 15°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 7 | SSW 7 | SSE 8 | SSE 8 | SSE 7 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SW 7 | SSW 7 | SW 7 | SW 7 | SW 6 | SW 7 | SSW 7 | SSW 7 | |
110 | 68 | 50 | 50 | 37 | 42 | 46 | 66 | 101 | 108 | 100 | 105 | 123 | 204 | 277 | 352 | 305 | 244 | 220 | 253 | 261 | 253 | 205 | 129 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-off | cross-off | cross-off | |
High Tide | 9:36AM0.88m | 9:59PM1.13m | 10:30AM0.87m | 10:54PM1.07m | 11:28AM0.85m | 11:51PM0.99m | ||||||||||||||||||
Low Tide | 3:50AM-0.10m | 3:12PM-0.11m | 4:47AM-0.07m | 4:09PM-0.06m | 5:47AM-0.04m | 5:15PM-0.00m | ||||||||||||||||||
 |  |  | | | |  | | | | | | |  | | | | | | | |  |  |  | |
 | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | 5:22 |
 | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:01 | — | 8:02 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | — | |
Temp °C | 21 | 19 | 20 | 20 | 22 | 21 | 20 | 19 | 20 | 19 | 19 | 21 | 19 | 18 | 19 | 20 | 18 | 19 | 20 | 20 | 19 | 19 | 18 | 15 |
22 | 19 | 20 | 19 | 20 | 19 | 18 | 16 | 17 | 16 | 16 | 18 | 14 | 14 | 15 | 15 | 14 | 16 | 16 | 15 | 14 | 17 | 15 | 10 | |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SW 6 | SSE 8 | SSE 7 | SSE 7 | SE 8 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 7 |
 kJ | 110 | 68 | 39 | 50 | 37 | 36 | 28 | 37 | 38 | 36 | 44 | 44 | 45 | 45 | 44 | 37 | 39 | 29 | 29 | 29 | 29 | 29 | 205 | 129 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | — | S 13 | S 13 | S 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | S 16 | SE 16 | S 16 | S 16 | S 15 | SE 15 | S 15 | S 15 | S 15 | SE 14 | SE 9 | SE 9 |
| kJ | 54 | 51 | 50 | — | 4 | 4 | 4 | 7 | 7 | 7 | 7 | 7 | 5 | 10 | 5 | 5 | 5 | 9 | 4 | 4 | 4 | 8 | 29 | 29 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 17 | — | — | — | S 16 | S 16 | — | S 16 | — | — | — | — | — | SE 12 | SE 12 | S 12 | — | S 15 | SE 15 |
| kJ | — | — | — | — | — | 6 | — | — | — | 5 | 5 | — | 5 | — | — | — | — | — | 6 | 6 | 3 | — | 4 | 8 |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 6 | SSW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SW 7 | SSW 7 | SW 7 | SW 7 | SW 6 | SW 7 | — | NW 3 |
| kJ | — | — | — | 38 | 22 | 42 | 46 | 66 | 101 | 108 | 100 | 105 | 123 | 204 | 277 | 352 | 305 | 244 | 220 | 253 | 261 | 253 | — | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 24 | 25 | 634 | 634 | 634 | 25 | 209 | 204 | 219 | 219 | 219 | 219 | 195 | 24 | 195 | 24 | 216 | 398 | 219 | 219 | 25 | 24 | 24 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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