Surf Forecasts:
Block Island surf forecast from 22 Aug 2026:
- Best quality surf: Saturday 29 Aug, 2AM (local time) - 4ft (1.2m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Saturday 29 Aug, 2PM (local time) - 4ft (1.2m), 7s period, S swell with 146 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 2AM (local time) - 4ft (1.2m), 7s period with SSW 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 Saturday (Aug 29) at 2AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.6m and 8s. 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 1.2m 7s and forecast to arrive on Saturday (Aug 29) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 25) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 29th Aug) | 4ft (1.2m) 7s |
| Best Surf | 2AM (Sat 29th Aug) | 4ft (1.2m) 7s |
| Most Powerful | 2PM (Sat 29th Aug) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let’s talk in feet and miles per hour. Rusty here, and I’m looking at the charts for Block Island. It’s a pretty quiet 16-day window, with a big gap of nothing much happening until we get into the second week.
The first real sniff of a wave comes on Wednesday, September 2nd in the morning. We’ve got a clean little 3ft swell from the SE, with a period of 12 seconds. The wind is light and offshore, so the surface will be glassy. The combined energy is moderate, checking in at 226. This is the best of the lot, but it’s still a marginal call.
Then on Thursday, September 3rd, the morning shows a bit more size at 4ft from the SE, with a period of 10 seconds. The wind is cross-shore, so it’ll be a bit lumpy, but there’s decent energy there (210) for a short board. Not a standout, just a possible session.
The weekend of September 6th sees a bump in energy with a 3ft to 3ft SSW swell, period 11 seconds, and moderate energy in the 214 to 272 range. But the wind is cross to cross-onshore, so it’ll be chopped and messy. Not a clean wave.
The water temperature is about 70°F, which is average for this time of year.
The main problem is that Block Island is a point break that *rarely breaks*, and for this forecast, it’s mostly not breaking well. The swell direction is ENE to SE, but the optimum for this spot is SE, so there’s a bit of a mismatch. The crowds are often around, but with this quality, you’ll have the place to yourself.
If you’re honestly looking for something to do, the Tuesday morning (September 2nd) is the only real shout. After that, it’s a long wait. The forecasts can change, but for now, it’s a quiet period for paddle surfing. If it gets bigger and windier, the beach setups might be more interesting for kite surfing.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun morning. Warm (max 26°C on Sun night, min 19°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu afternoon, min 20°C on Tue night). Winds decreasing (fresh winds from the WSW on Tue afternoon, calm by Wed morning). | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | ENE 5 | E 5 | SE 9 | SE 12 | SE 12 | SE 12 | SSE 6 | SSW 6 | SSW 6 | SW 6 | SW 5 | SE 10 | ESE 8 | ESE 8 | ESE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 26 | 12 | 13 | 23 | 22 | 28 | 47 | 81 | 75 | 32 | 41 | 26 | 48 | 45 | 39 | 84 | 77 | 97 | 61 | 57 | 131 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | on | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | off |
High Tide | 5:03PM0.80m | 5:21AM0.64m | 5:53PM0.83m | 6:12AM0.69m | 6:36PM0.86m | 6:56AM0.76m | 7:13PM0.89m | 7:35AM0.82m | 7:47PM0.91m | 8:10AM0.87m | 8:18PM0.93m | 8:43AM0.91m | 8:50PM0.94m | ||||||||
Low Tide | 10:14AM0.24m | 11:34PM0.23m | 11:15AM0.22m | 00:18AM0.20m | 12:06PM0.18m | 00:57AM0.14m | 12:50PM0.15m | 1:31AM0.09m | 1:30PM0.11m | 2:02AM0.05m | 2:08PM0.09m | 2:30AM0.02m | 2:43PM0.07m | 2:55AM0.01m | |||||||
 | |  |  |  |  | | |  | | | | | | | | |  |  | | | |
 | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:35 | — | — | 7:34 | — | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — |
mm | — | — | — | 2 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Temp °C | 20 | 20 | 21 | 23 | 25 | 26 | 22 | 23 | 23 | 21 | 23 | 23 | 21 | 23 | 23 | 23 | 24 | 23 | 25 | 25 | 25 |
Feels °C | 21 | 21 | 22 | 24 | 25 | 25 | 20 | 19 | 18 | 17 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 23 | 27 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | SE 8 | E 4 | SSE 5 | SSE 6 | SE 11 | SSW 6 | SE 11 | SE 10 | SE 10 | ESE 8 | ESE 8 | ESE 8 | SE 9 | SE 9 | SE 9 | SSE 5 | SE 8 | SSW 7 |
| kJ | 12 | 11 | 11 | 11 | 3 | 28 | 47 | 19 | 75 | 18 | 17 | 26 | 48 | 45 | 39 | 84 | 77 | 97 | 37 | 57 | 131 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 9 | E 5 | ESE 7 | SE 8 | SE 12 | SE 12 | SE 7 | SE 11 | SE 6 | ESE 6 | ESE 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | S 8 | SSW 6 | SE 9 | E 10 | SE 8 |
| kJ | 7 | 3 | 4 | 5 | 11 | 22 | 21 | 12 | 18 | 10 | 7 | 3 | 17 | 13 | 12 | 17 | 10 | 13 | 61 | 2 | 40 |
Swell 3 Height (m) Direction Period (s) | — | SE 13 | SE 9 | SE 12 | SE 12 | E 6 | E 6 | E 6 | SE 6 | SE 5 | E 6 | SSW 6 | E 13 | E 12 | SE 10 | E 11 | E 11 | E 10 | E 10 | — | E 10 |
| kJ | — | 7 | 13 | 23 | 22 | 3 | 1 | 1 | 10 | 1 | 1 | 4 | 4 | 3 | 16 | 2 | 2 | 2 | 2 | — | 2 |
Wind waves Height (m) Direction Period (s) | ENE 5 | E 5 | — | SE 4 | S 4 | SW 5 | SW 5 | SSW 6 | W 4 | SW 6 | SW 5 | SW 5 | — | — | SW 3 | WSW 3 | SSW 6 | SSE 4 | — | S 5 | — |
| kJ | 26 | 12 | — | 20 | 18 | 23 | 17 | 81 | 13 | 32 | 41 | 26 | — | — | 1 | 1 | 14 | 7 | — | 46 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 665 | 605 | 207 | 221 | 221 | 42 | 161 | 198 | 24 | 160 | 24 | 24 | 24 | 133 | 24 | 26 | 1148 | 198 | 24 | 219 | 0 |
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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