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Block Island Surf Forecast
/ Rhode Island (33 breaks) / Rhode Island (34 breaks) /
Surf Forecasts:
Block Island surfForecast / Rhode Island / USA
16 Day Weather and Surf, issued 7 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)Best Forecast Surf Conditions for Block Island this week:
The surf forecast for Block Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (May 20) at 11PM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 2.1m 8s and forecast to arrive on Sunday (May 24) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Friday (May 22) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 20th May) | 4.5ft (1.3m) 7s |
| Best Surf | 2AM (Tue 26th May) | 4.5ft (1.4m) 7s |
| Most Powerful | 2PM (Sun 24th May) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Thu morning. Warm (max 25°C on Wed afternoon, min 10°C on Thu morning). Winds decreasing (fresh winds from the SW on Wed afternoon, calm by Thu night). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun night. Very mild (max 18°C on Mon night, min 10°C on Sat afternoon). Winds decreasing (strong winds from the E on Sun night, light winds from the WNW by Mon night). | ||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 5 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | SSW 7 | |
192 | 209 | 110 | 51 | 40 | 21 | 21 | 14 | 15 | 14 | 19 | 204 | 458 | 470 | 289 | 125 | 164 | 175 | 83 | 75 | 50 | |
Wind (km/h) | |||||||||||||||||||||
cross | cross | off | cross-off | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | on | cross-off | cross | cross-off | off | cross-on | cross-off | |
High Tide | 11:28AM0.85m | 11:51PM0.99m | 12:31PM0.84m | 00:51AM0.91m | 1:36PM0.84m | 1:55AM0.83m | 2:43PM0.85m | 3:00AM0.77m | 3:46PM0.87m | 4:03AM0.73m | 4:43PM0.89m | 5:00AM0.71m | 5:34PM0.91m | ||||||||
Low Tide | 5:15PM-0.00m | 6:48AM-0.00m | 6:36PM0.06m | 7:49AM0.02m | 8:01PM0.11m | 8:48AM0.04m | 9:15PM0.13m | 9:43AM0.05m | 10:20PM0.13m | 10:33AM0.07m | 11:17PM0.12m | 11:19AM0.08m | 00:07AM0.10m | ||||||||
 |  |  |  |  |  | | |  |  | | | | |  | | | | | | | |
 | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:18 | — | — |
 | — | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:04 | — | — | 8:05 | — | — | 8:06 | — | — | 8:07 | — |
— | — | 4 | 6 | 1 | — | — | — | — | — | — | — | — | 2 | 17 | — | — | — | — | — | — | |
Temp °C | 23 | 25 | 24 | 14 | 11 | 11 | 12 | 12 | 12 | 12 | 10 | 12 | 11 | 10 | 15 | 14 | 13 | 18 | 21 | 22 | 23 |
21 | 21 | 23 | 11 | 8 | 8 | 7 | 8 | 7 | 7 | 6 | 7 | 4 | 2 | 13 | 10 | 10 | 17 | 20 | 19 | 22 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SSW 6 | SSW 6 | SSW 6 | S 6 | S 6 | S 6 | SE 5 | SE 10 | SE 9 | S 12 | S 18 | SE 8 | SE 8 | SE 8 | SE 7 | SSW 7 | SSW 7 | SSW 6 | SSW 7 |
 kJ | 29 | 29 | 110 | 51 | 40 | 11 | 11 | 11 | 7 | 14 | 14 | 3 | 6 | 470 | 289 | 125 | 91 | 175 | 83 | 75 | 50 |
Swell 2 Height (m) Direction Period (s) | S 15 | S 15 | SE 9 | SE 9 | SE 9 | ESE 4 | SE 9 | SE 9 | S 6 | S 6 | SE 13 | — | — | S 18 | S 17 | S 16 | S 16 | SE 8 | SE 7 | SE 7 | SE 7 |
| kJ | 4 | 4 | 29 | 29 | 28 | 5 | 21 | 14 | 7 | 3 | 7 | — | — | 6 | 6 | 5 | 5 | 45 | 27 | 19 | 8 |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 12 | SE 15 | SE 14 | SE 14 | SE 9 | SE 13 | SE 13 | SE 10 | SE 13 | S 7 | — | — | — | — | — | — | — | S 15 | S 15 | — |
| kJ | 6 | 3 | 8 | 8 | 8 | 21 | 7 | 7 | 15 | 7 | 4 | — | — | — | — | — | — | — | 4 | 4 | — |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 6 | NW 2 | NE 3 | ENE 4 | — | ENE 4 | E 4 | — | ESE 3 | SE 5 | SE 7 | SE 8 | — | — | SW 6 | SSW 6 | — | NNW 3 | W 4 | N 3 |
| kJ | 192 | 209 | 1 | 7 | 10 | — | 15 | 7 | — | 4 | 19 | 204 | 458 | — | — | 123 | 164 | — | 1 | 9 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 219 | 24 | 25 | 25 | 157 | 157 | 729 | 680 | 157 | 709 | 1148 | 605 | 689 | 1148 | 117 | 24 | 26 | 0 | 24 | 26 | 24 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Surf Rating (10 Max)
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Block Island Surf forecast
The above surf forecast table for Block Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Block Island can be found by selecting the local surf guide option on the grey menu. Our Block Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Block Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Block Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Block Island is 33 km (20 miles) from Westerly. If you plan a vacation in Rhode Island, look for hotels and other accommodation in Westerly. Westerly has rooms for a wide range of budgets as well as car hire and transport links.
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