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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 pm Thursday 21 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
11.6° 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 8PM is: 0.7m 6s primary swell from a South direction and 0.4m 9s secondary swell from a Southeast direction, 0.5m 4s secondary swell from a East direction (forecast issued at 01:00pm May 21). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 3ft (0.9m) | 6s |
| Afternoon (21 May) | 2.5ft (0.7m) | 6s |
| Evening (21 May) | 1.5ft (0.4m) | 9s |
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 27mm), heaviest during Sun morning. Very mild (max 14°C on Thu afternoon, min 8°C on Sat afternoon). Winds increasing (light winds from the E on Thu night, near gales from the E by Sun morning). | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 6 | SSW 6 | SSW 6 | S 6 | SE 9 | SE 9 | S 6 | S 6 | ENE 4 | E 5 | E 5 | E 5 | E 4 | SE 10 | SE 10 | ESE 6 | ESE 4 | ESE 5 | SE 6 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | |
53 | 40 | 40 | 39 | 29 | 27 | 18 | 16 | 43 | 61 | 50 | 45 | 26 | 19 | 16 | 38 | 42 | 66 | 139 | 247 | 363 | 447 | 623 | 795 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | on | on | cross-on | cross | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 12:31PM0.84m | 00:51AM0.91m | 1:36PM0.84m | 1:55AM0.83m | 2:43PM0.85m | 3:00AM0.77m | ||||||||||||||||||
Low Tide | 6:36PM0.06m | 7:49AM0.02m | 8:01PM0.11m | 8:48AM0.04m | 9:15PM0.13m | |||||||||||||||||||
 |  | | |  | |  | |  | | | | | | | | | |  | |  | | |  | |
 | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — |
 | — | — | — | 8:02 | — | — | — | — | — | — | — | 8:04 | — | — | — | — | — | — | — | 8:04 | — | — | — | 8:05 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 3 | 2 | 2 | 6 | |
Temp °C | 16 | 14 | 13 | 12 | 12 | 13 | 13 | 11 | 12 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 12 | 10 | 8 | 8 | 9 | 10 | 10 | 9 |
11 | 10 | 9 | 10 | 10 | 10 | 9 | 4 | 6 | 7 | 5 | 5 | 6 | 7 | 6 | 5 | 6 | 4 | 3 | 3 | 3 | 3 | 1 | -1 | |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SSW 6 | SSW 6 | S 6 | S 6 | S 6 | S 6 | S 6 | SSW 6 | S 6 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | S 6 | S 6 | S 12 | — | — | S 18 |
 kJ | 53 | 40 | 40 | 39 | 28 | 27 | 18 | 16 | 10 | 7 | 14 | 14 | 14 | 14 | 14 | 14 | 4 | 4 | 1 | 1 | 3 | — | — | 6 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | E 4 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSE 6 | S 7 | S 7 | S 7 | S 7 | SE 13 | SE 13 | SE 13 | — | S 13 | — | — | — | — |
| kJ | 29 | 27 | 29 | 29 | 8 | 21 | 13 | 13 | 13 | 13 | 8 | 3 | 3 | 4 | 4 | 7 | 7 | 7 | — | 3 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 14 | SE 14 | S 15 | SE 9 | SE 14 | SSW 6 | SE 13 | SSE 7 | SSW 6 | SW 6 | SE 13 | SE 13 | SE 13 | SE 13 | SE 8 | — | SE 13 | — | — | — | — | — | — |
| kJ | 8 | 8 | 8 | 4 | 29 | 7 | 3 | 7 | 5 | 3 | 1 | 7 | 7 | 7 | 7 | 2 | — | 7 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 3 | ENE 4 | ENE 4 | E 4 | — | E 4 | E 4 | ENE 4 | ENE 4 | E 5 | E 5 | E 5 | E 4 | ESE 4 | ESE 4 | ESE 6 | ESE 4 | ESE 5 | SE 6 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 |
| kJ | 5 | 10 | 9 | 8 | — | 5 | 5 | 13 | 43 | 61 | 50 | 45 | 26 | 19 | 16 | 38 | 42 | 66 | 139 | 247 | 363 | 447 | 623 | 795 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 25 | 156 | 59 | 152 | 163 | 705 | 680 | 702 | 743 | 2565 | 2565 | 749 | 645 | 615 | 588 | 588 | 1095 | 1095 | 24 | 25 | 588 | 482 | 374 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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