Surf Forecasts:
Block Island surf forecast from 28 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 5PM (local time) - 4.5ft (1.4m), 6s period, SE swell with glassy winds.
- Most powerful swell: Wednesday 2 Sep, 8AM (local time) - 6.5ft (2.0m), 6s period, SE swell with 287 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 5PM (local time) - 4.5ft (1.4m), 6s period with SE swell.
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 (Sep 02) at 5PM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.6m and 10s. Another secondary swell of 0.4m and 5s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 2.0m 6s and forecast to arrive on Wednesday (Sep 02) at 8AM. 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 Monday (Aug 31) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Wed 2nd Sep) | 4.5ft (1.4m) 6s |
| Best Surf | 5PM (Wed 2nd Sep) | 4.5ft (1.4m) 6s |
| Most Powerful | 8AM (Wed 2nd Sep) | 6.5ft (2.0m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let’s talk about Block Island. This is a tough one to start with, because we’re looking at a long, dry spell. The first solid surf that’s even worth a look doesn’t show up until Thursday, September 10th. That’s a frustrating gap of over a week with nothing but tiny, messy, or useless waves. The wind is all over the place, and the swell just isn’t cooperating.
The only real play in the entire 16-day window is that Thursday morning, September 10th. We’ve got a clean 4ft swell rolling in from the SSW. The period is short at 7 seconds, so it’s not going to have any real punch or shape, but the wind is offshore from the NE, which cleans it right up. The combined energy is moderate at 189 (low to moderate). It’s surfable, but it’s ordinary. The rest of that day and the following days just fall apart again with onshore winds and tiny waves.
Block Island is a point break that rarely breaks, so this kind of blank run, while frustrating, is not unusual for the area. The water temperature is about average for the time of year, nothing wild to report. Honestly, for the first week and a half, you’re better off finding something else to do. The setup is so poor for so long that it’s not worth the drive.
On the 10th, if you’re desperate, you might get a couple of clean but weak ones. The swell direction from the SSW is a bit off the optimum SE direction for this spot, so the waves will be a little wonky. But with that offshore wind, it’s the only clean window in the whole outlook.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 26°C on Sun night, min 18°C on Sat morning). Winds increasing (calm on Sat afternoon, fresh winds from the SW by Sun night). | Days 4-6 Weather SummaryHeavy rain (total 41mm), heaviest during Wed night. Warm (max 24°C on Mon night, min 20°C on Tue morning). Winds decreasing (fresh winds from the ESE on Tue night, calm by Wed afternoon). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
AM | 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 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SW 5 | SW 5 | SE 8 | SE 7 | SE 4 | SE 4 | SE 6 | SE 6 | SE 6 | SE 6 | SE 9 | SE 9 | SE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 80 | 78 | 61 | 39 | 35 | 33 | 25 | 25 | 96 | 27 | 16 | 14 | 12 | 36 | 209 | 266 | 151 | 91 | 50 | 39 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | off | cross-off | cross-on | cross-off | cross | cross-on | cross | cross-off | cross | on | on | on | cross-on | cross-on | glassy | cross-on | cross | cross-off | off |
High Tide | 8:43AM0.91m | 8:50PM0.94m | 9:14AM0.95m | 9:25PM0.94m | 9:47AM0.98m | 10:03PM0.92m | 10:23AM0.99m | 10:44PM0.88m | 11:05AM1.00m | 11:30PM0.83m | 11:52AM0.99m | 00:21AM0.77m | 12:48PM0.97m | 1:21AM0.73m | |||||||
Low Tide | 2:43PM0.07m | 2:55AM0.01m | 3:19PM0.05m | 3:22AM0.00m | 3:56PM0.05m | 3:52AM0.01m | 4:38PM0.06m | 4:27AM0.03m | 5:25PM0.09m | 5:08AM0.05m | 6:26PM0.13m | 5:56AM0.08m | 7:52PM0.16m | ||||||||
 |  |  | | | | | |  | | |  |  |  | |  |  |  | | | | |
 | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | 3 | — | — | — | 8 | 15 | 5 | — | 1 | 12 | — | — | — |
Temp °C | 23 | 25 | 25 | 19 | 20 | 21 | 21 | 23 | 26 | 23 | 23 | 24 | 20 | 21 | 21 | 22 | 23 | 23 | 22 | 25 | 26 |
Feels °C | 26 | 25 | 25 | 16 | 19 | 19 | 20 | 20 | 24 | 23 | 22 | 24 | 21 | 22 | 18 | 21 | 26 | 27 | 22 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SW 5 | SSW 5 | SE 7 | SW 4 | SE 14 | — | — | SE 10 | SE 6 | SE 6 | SE 6 | SE 6 |
| kJ | 80 | 78 | 61 | 39 | 35 | 33 | 25 | 25 | 17 | 27 | 15 | 14 | 1 | 7 | — | — | 63 | 91 | 38 | 30 | 23 |
Swell 2 Height (m) Direction Period (s) | S 6 | S 6 | SSW 6 | S 6 | S 6 | SSW 6 | S 6 | E 5 | E 5 | SE 8 | SE 8 | SSW 4 | SE 10 | SE 13 | — | — | SW 5 | SE 10 | SE 9 | SE 9 | SW 4 |
| kJ | 35 | 25 | 10 | 20 | 20 | 11 | 9 | 1 | 1 | 16 | 16 | 2 | 4 | 7 | — | — | 6 | 58 | 50 | 39 | 13 |
Swell 3 Height (m) Direction Period (s) | E 10 | E 10 | E 9 | E 10 | NE 4 | ENE 6 | E 6 | E 9 | — | SE 8 | S 7 | SW 4 | S 14 | SW 5 | — | — | — | SW 5 | — | — | SE 8 |
| kJ | 2 | 2 | 2 | 2 | 4 | 3 | 1 | 2 | — | 16 | 1 | 1 | 4 | 1 | — | — | — | 6 | — | — | 25 |
Wind waves Height (m) Direction Period (s) | — | — | NNW 3 | NE 4 | — | — | — | SW 4 | SW 5 | NNW 3 | W 5 | ESE 3 | SE 4 | SE 4 | SE 6 | SE 6 | SE 6 | — | SW 4 | SW 3 | NW 3 |
| kJ | — | — | 2 | 7 | — | — | — | 12 | 96 | 1 | 7 | 1 | 12 | 36 | 209 | 266 | 151 | — | 5 | 2 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 24 | 26 | 26 | 29 | 24 | 24 | 847 | 702 | 24 | 49 | 769 | 1156 | 1156 | 1805 | 482 | 645 | 377 | 29 | 157 | 25 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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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