Surf Forecasts:
Block Island surf forecast from 31 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 11PM (local time) - 5ft (1.6m), 6s period, ESE swell with 179 kJ wave energy.
Best Forecast Surf Conditions for Block Island this week:
The most powerful waves expected at Block Island in the next 16 days are 1.6m 6s and forecast to arrive on Tuesday (Sep 01) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Sep 05) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Tue 1st Sep) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Right then, let’s talk about Block Island. Don’t get your hopes up too high for the next week or so – it’s a bit of a quiet stretch. We’ve got a long gap of nothing really worth chasing from now until the 13th of September. The week is full of tiny, weak swells with poor quality, so you’re not missing much.
Things finally start looking interesting on the morning of Sunday, the 13th of September. That’s the standout window. Block Island (a point break) is a rarely-breaking spot, so when it fires, it’s a big deal. The early morning brings a solid 8ft swell from the SSW, with a combined energy of 577 (moderate-strong). The wind is a light NNE breeze, giving us clean conditions. The period is 7 seconds, so it’s a short-period swell, but with that much size, expect some punchy, powerful waves. That morning is the one to aim for, but it’s looking like it’s going to be bigger than 8ft by the afternoon, pushing it into expert-only territory. Also, keep in mind this break can get crowded often, so you’ll have company.
The following morning, Monday the 14th of September, is a decent backup. Swell drops to 6ft from the SSW, with the combined energy at 473 (moderate). The wind is a light W breeze, keeping it clean. That’s a good session for intermediate surfers, but it’s not the standout.
Other than that, the rest of the two weeks is mostly small and messy, with plenty of cross-onshore winds messing up the shape. Not much else to report.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Tue morning. Warm (max 22°C on Mon night, min 18°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 27°C on Fri afternoon, min 16°C on Sun morning). Mainly fresh winds. | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SE 8 | SE 8 | SE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | SE 7 | SE 6 | ESE 8 | ESE 7 | ESE 7 | SE 8 | SSW 6 | ESE 7 | SE 7 | E 7 | E 9 | ENE 6 | ENE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 17 | 14 | 12 | 145 | 159 | 145 | 145 | 100 | 62 | 114 | 64 | 26 | 23 | 21 | 20 | 14 | 8 | 13 | 20 | 30 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:44PM0.88m | 11:05AM1.00m | 11:30PM0.83m | 11:52AM0.99m | 00:21AM0.77m | 12:48PM0.97m | 1:21AM0.73m | 1:55PM0.95m | 2:32AM0.71m | 3:13PM0.94m | 3:50AM0.73m | 4:30PM0.96m | ||||||||
Low Tide | 4:38PM0.06m | 4:27AM0.03m | 5:25PM0.09m | 5:08AM0.05m | 6:26PM0.13m | 5:56AM0.08m | 7:52PM0.16m | 6:55AM0.10m | 9:21PM0.17m | 8:08AM0.12m | 10:31PM0.14m | 9:43AM0.11m | 11:29PM0.10m | |||||||
 |  |  |  |  |  | |  | |  |  |  | | | | | | | | | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — |
mm | — | 8 | 13 | 2 | 3 | — | — | — | 5 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 21 | 22 | 19 | 19 | 20 | 22 | 22 | 23 | 24 | 24 | 27 | 24 | 21 | 23 | 19 | 18 | 16 | 16 |
Feels °C | 19 | 22 | 22 | 25 | 16 | 15 | 17 | 23 | 22 | 25 | 26 | 23 | 25 | 22 | 18 | 22 | 14 | 12 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SE 8 | SE 7 | SE 13 | SE 12 | SE 11 | SE 10 | SE 7 | SE 6 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | SSW 6 | ESE 7 | SE 7 | ENE 4 | E 9 | ENE 6 | ENE 10 |
| kJ | 9 | 14 | 12 | 7 | 71 | 94 | 49 | 100 | 62 | 114 | 64 | 26 | 15 | 21 | 20 | 14 | 3 | 13 | 20 | 30 |
Swell 2 Height (m) Direction Period (s) | SE 8 | — | SW 4 | — | — | SSW 5 | SSW 5 | SE 9 | SE 9 | SE 6 | SW 5 | SW 4 | SE 8 | ESE 6 | SSW 6 | SSW 6 | E 7 | SE 9 | E 7 | SE 9 |
| kJ | 17 | — | 1 | — | — | 2 | 2 | 53 | 50 | 2 | 17 | 5 | 23 | 14 | 14 | 6 | 8 | 3 | 16 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 14 | — | — | — | — | SW 5 | — | — | — | SE 8 | — | SE 8 | — | E 8 | SSW 5 | SW 6 | SSW 6 | SSW 6 |
| kJ | — | — | 8 | — | — | — | — | 1 | — | — | — | 17 | — | 10 | — | 5 | 3 | 1 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 3 | S 3 | SE 3 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | — | SSW 5 | SW 4 | NW 3 | NNW 3 | WSW 4 | NNW 3 | N 3 | ENE 4 | — | NE 4 | — | SW 3 |
| kJ | 2 | 5 | 2 | 145 | 159 | 145 | 145 | — | 3 | 14 | 1 | 4 | 17 | 3 | 6 | 11 | — | 15 | — | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1156 | 249 | 702 | 445 | 269 | 606 | 374 | 25 | 24 | 26 | 24 | 29 | 49 | 85 | 2394 | 2583 | 861 | 1701 | 249 | 130 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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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