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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 Wednesday 20 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
11.1° C
(Which is normal for this time of year)How big are the waves at Block Island today?
The current surf forecast for Block Island at 8AM is: 1.7m 7s primary swell from a South-southwest direction and 0.4m 9s secondary swell from a Southeast direction, 0.1m 15s secondary swell from a South direction (forecast issued at 01:00am May 20). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 5ft (1.6m) | 7s |
| Afternoon (20 May) | 5ft (1.5m) | 6s |
| Evening (20 May) | 5.5ft (1.7m) | 7s |
Table - waves today at Block Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 25mm), heaviest during Wed night. Warm (max 24°C on Wed afternoon, min 10°C on Thu morning). Winds decreasing (fresh winds from the W on Wed night, light winds from the SSE by Thu night). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | E 4 | SE 9 | SE 9 | SE 10 | SE 10 | |
383 | 323 | 251 | 205 | 186 | 202 | 237 | 180 | 117 | 99 | 72 | 57 | 41 | 41 | 31 | 30 | 29 | 21 | 21 | 14 | 22 | 14 | 14 | 45 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | |
High Tide | 11:28AM0.85m | 11:51PM0.99m | 12:31PM0.84m | 00:51AM0.91m | 1:36PM0.84m | |||||||||||||||||||
Low Tide | 5:47AM-0.04m | 5:15PM-0.00m | 6:48AM-0.00m | 6:36PM0.06m | 7:49AM0.02m | 8:01PM0.11m | ||||||||||||||||||
 | |  |  | |  |  |  |  |  |  | | |  | |  | | | | | | | | | |
 | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:01 | — | — | — | — | — | — | — | 8:02 | — | — | — | — | — | — | — | 8:04 | — |
— | — | — | — | — | 1 | 8 | 9 | 2 | — | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 19 | 21 | 22 | 24 | 22 | 20 | 19 | 16 | 16 | 14 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 12 | 12 | 12 | 12 |
16 | 15 | 19 | 20 | 20 | 19 | 17 | 15 | 13 | 14 | 11 | 4 | 7 | 8 | 6 | 9 | 8 | 7 | 5 | 8 | 9 | 8 | 8 | 8 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | S 6 | S 6 | S 6 | SE 9 | SSE 7 | SSE 6 | SSE 6 | SE 10 |
 kJ | 38 | 27 | 28 | 29 | 29 | 29 | 29 | 180 | 117 | 99 | 72 | 57 | 41 | 41 | 31 | 30 | 20 | 18 | 11 | 13 | 9 | 11 | 14 | 45 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 15 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | E 4 | ESE 4 | SE 4 | SE 9 | SSW 6 | SE 9 | SE 9 | SE 10 | S 6 |
| kJ | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 9 | 5 | 4 | 21 | 6 | 22 | 14 | 14 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 12 | — | S 12 | S 15 | S 15 | SE 15 | S 15 | SE 14 | SE 14 | SE 14 | SE 14 | S 15 | SE 9 | SE 9 | SE 9 | SE 13 | SSE 7 | SSW 6 | SE 13 | ENE 4 | — |
| kJ | — | — | — | 6 | — | 3 | 4 | 4 | 8 | 4 | 8 | 8 | 8 | 8 | 4 | 28 | 29 | 21 | 7 | 4 | 3 | 7 | 1 | — |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SSW 7 | — | NW 3 | N 3 | NNE 3 | NE 3 | ENE 4 | E 4 | E 4 | E 4 | — | — | ENE 3 | E 4 | E 4 | E 4 | ESE 5 | — |
| kJ | 383 | 323 | 251 | 205 | 186 | 202 | 237 | — | 3 | 3 | 4 | 5 | 14 | 18 | 13 | 13 | — | — | 8 | 14 | 8 | 7 | 11 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 211 | 217 | 219 | 24 | 24 | 24 | 24 | 0 | 24 | 24 | 24 | 25 | 157 | 642 | 156 | 157 | 49 | 749 | 749 | 693 | 677 | 665 | 249 |
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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