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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 1 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 6AM is: 1.0m 7s primary swell from a South-southwest direction and 0.7m 8s secondary swell from a South-southeast direction (forecast issued at 01:00am May 18). The wind direction is predicted to be cross-offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 8s |
| Afternoon (18 May) | 2.5ft (0.7m) | 8s |
| Evening (18 May) | 3ft (0.9m) | 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 2mm), mostly falling on Tue night. Warm (max 22°C on Wed night, min 14°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Tue night). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SW 7 | SSW 7 | SSW 7 | SSE 8 | SSE 8 | SSW 6 | SSE 7 | SSW 5 | SSW 5 | SW 5 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 7 | SSW 7 | |
114 | 110 | 68 | 50 | 50 | 41 | 37 | 44 | 52 | 82 | 92 | 97 | 105 | 148 | 270 | 286 | 332 | 305 | 268 | 227 | 214 | 253 | 253 | 165 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross | cross-on | glassy | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross | cross-off | cross-off | |
High Tide | 9:36AM0.88m | 9:59PM1.13m | 10:30AM0.87m | 10:54PM1.07m | 11:28AM0.85m | |||||||||||||||||||
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 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:01 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 1 | — | |
Temp °C | 22 | 20 | 18 | 18 | 17 | 20 | 20 | 19 | 19 | 20 | 18 | 19 | 21 | 20 | 18 | 20 | 17 | 16 | 19 | 20 | 21 | 19 | 22 | 18 |
20 | 19 | 16 | 16 | 18 | 19 | 18 | 17 | 15 | 17 | 15 | 16 | 18 | 16 | 13 | 16 | 12 | 12 | 16 | 16 | 16 | 15 | 22 | 14 | |
Swell 1 Height (m) Direction Period (s) | SW 7 | SSW 7 | SSW 7 | SW 6 | SSE 8 | SSE 7 | SSE 7 | SE 7 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SW 7 | SSW 7 |
 kJ | 114 | 110 | 68 | 39 | 50 | 37 | 37 | 27 | 37 | 38 | 36 | 44 | 44 | 44 | 43 | 36 | 38 | 39 | 29 | 29 | 29 | 29 | 253 | 165 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SSE 8 | — | — | NE 4 | — | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 14 | S 16 | SE 16 | S 16 | — | SE 15 | S 15 | S 15 | S 15 | SE 9 | SE 9 |
| kJ | 44 | 54 | 51 | 50 | — | — | 1 | — | 7 | 7 | 7 | 7 | 7 | 7 | 5 | 10 | 5 | — | 9 | 4 | 4 | 4 | 29 | 29 |
Swell 3 Height (m) Direction Period (s) | S 7 | — | — | — | — | S 13 | S 13 | S 13 | — | — | — | S 16 | — | S 16 | — | — | — | — | — | S 12 | SE 12 | S 12 | SE 14 | S 15 |
| kJ | 39 | — | — | — | — | 4 | 4 | 4 | — | — | — | 5 | — | 5 | — | — | — | — | — | 3 | 6 | 3 | 8 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 6 | SSW 6 | SSW 4 | SSW 5 | SSW 5 | SW 5 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | — | — |
| kJ | — | — | — | — | 33 | 41 | 30 | 44 | 52 | 82 | 92 | 97 | 105 | 148 | 270 | 286 | 332 | 305 | 268 | 227 | 214 | 253 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 24 | 445 | 25 | 634 | 634 | 198 | 198 | 217 | 204 | 219 | 219 | 219 | 670 | 24 | 216 | 198 | 29 | 398 | 219 | 230 | 0 | 24 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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