Surf Forecasts:
Block Island surf forecast from 3 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 5AM (local time) - 6ft (1.8m), 8s period, SSW swell with offshore winds.
- Most powerful swell: Monday 3 Aug, 2PM (local time) - 11ft (3.5m), 9s period, S swell with 1,851 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 5AM (local time) - 6ft (1.8m), 8s 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 Tuesday (Aug 04) at 5AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.7m and 7s. 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 3.5m 9s and forecast to arrive on Monday (Aug 03) 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 4s period and expected on Tuesday (Aug 04) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 4th Aug) | 6ft (1.8m) 8s |
| Best Surf | 5AM (Tue 4th Aug) | 6ft (1.8m) 8s |
| Most Powerful | 2PM (Mon 3rd Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's be straight with you – it's a tough stretch ahead for Block Island. I've stared at the numbers and honestly, there's not a single standout session in the whole 16-day window. It's a long, flat run with very little to get excited about.
The forecast starts on Monday, August 3rd, and we're looking at a solid 10ft to 12ft swell from the south, but it's arriving with a strong 28 mph south-southwest wind. That's a mess. The combined wave energy is massive (1422 to 1667), but it's all blown-out, cross-onshore junk. Not one for the paddle board; this is more of a kite surfer's setup if anything. The water temperature is 69°, which is running a bit colder than normal for this time of year.
Tuesday, August 4th, through the weekend of August 9th, things drop off hard. We're looking at knee-to-thigh high swell, mostly around 3ft to 4ft, with a short, weak period of 6 to 8 seconds. The combined energy is weak, often in the low double or triple digits. The wind is a mix of cross and cross-onshore, keeping the surface lumpy and uninviting. The best you can hope for is a marginal, questionable tide window.
The following week, from August 10th through the 18th, is a bleak picture. The swell stays tiny, mostly under 3ft, with a miserable 4 to 7 second period. The combined energy is pitiful, often under 100. There are a few mornings with clean, cross-offshore winds, like on the 11th, 13th, and 14th, but there's simply no wave energy to work with. It's a long, drawn-out period of flatness.
The only flicker of something is on Tuesday, August 18th, with a 5ft south-west swell and 6-second period, but it's ruined by a 16 mph cross-onshore wind. It's the same old story. For an exposed point break like this that rarely breaks, a blank run like this is more normal than not. It's a frustrating outlook, but forecasts can change. Keep your eyes on it.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Mon afternoon. Warm (max 24°C on Mon morning, min 20°C on Mon night). Winds decreasing (strong winds from the SSW on Mon afternoon, light winds from the WSW by Tue morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 24°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | S 8 | SSW 9 | S 9 | SSW 8 | SSW 8 | SSW 7 | S 8 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1422 | 1667 | 617 | 206 | 127 | 69 | 228 | 97 | 34 | 61 | 97 | 196 | 94 | 94 | 83 | 55 | 41 | 68 | 55 | 48 | 60 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-off | cross | cross | cross | cross | cross-on | cross |
High Tide | 11:33AM0.91m | 11:50PM0.83m | 12:17PM0.93m | 00:39AM0.78m | 1:08PM0.94m | 1:35AM0.74m | 2:09PM0.95m | 2:40AM0.71m | 3:20PM0.97m | 3:52AM0.71m | 4:35PM1.00m | 5:04AM0.75m | 5:43PM1.04m | ||||||||
Low Tide | 5:42PM0.13m | 5:39AM0.06m | 6:38PM0.14m | 6:24AM0.07m | 7:51PM0.16m | 7:16AM0.08m | 9:20PM0.16m | 8:19AM0.08m | 10:36PM0.14m | 9:31AM0.06m | 11:40PM0.10m | 10:49AM0.03m | 00:36AM0.05m | ||||||||
 |  |  |  | | |  | |  | | |  | | | | | | | | | | |
 | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — |
 | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — |
mm | 4 | 8 | 3 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 23 | 23 | 23 | 24 | 24 | 22 | 24 | 24 | 25 | 26 | 25 | 26 | 27 | 26 | 25 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 20 | 18 | 23 | 23 | 22 | 21 | 24 | 25 | 25 | 26 | 26 | 25 | 27 | 26 | 26 | 26 | 27 | 26 | 28 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | — | — | S 9 | SSW 8 | SSW 8 | SSW 7 | S 8 | SSW 7 | SSW 7 | SSW 6 | SE 8 | SE 7 | SSW 6 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | SSW 6 | SE 7 | SSW 6 |
| kJ | — | — | 617 | 206 | 127 | 69 | 228 | 97 | 34 | 61 | 9 | 8 | 94 | 9 | 16 | 55 | 15 | 14 | 55 | 2 | 60 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SE 7 | SE 7 | SE 7 | SE 7 | SE 6 | SE 6 | SE 6 | E 11 | E 10 | SE 8 | E 9 | E 9 | SE 8 | E 8 | E 8 | SSE 7 | E 9 | SE 7 |
| kJ | — | — | — | 38 | 49 | 47 | 39 | 32 | 21 | 7 | 2 | 2 | 9 | 2 | 2 | 17 | 1 | 1 | 5 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | NNW 3 | — | E 11 | — | E 10 | — | SE 8 | — | — | E 10 | — | — | E 8 | — | — | E 8 | — | SE 10 |
| kJ | — | — | — | 1 | — | 2 | — | 2 | — | 3 | — | — | 2 | — | — | 1 | — | — | 1 | — | 4 |
Wind waves Height (m) Direction Period (s) | S 8 | SSW 9 | NW 3 | — | — | — | NNE 3 | — | SSW 4 | — | SSW 6 | SSW 6 | — | SSW 6 | SW 6 | — | SSW 6 | SSW 6 | — | SSW 6 | — |
| kJ | 1422 | 1667 | 7 | — | — | — | 3 | — | 5 | — | 97 | 196 | — | 94 | 83 | — | 41 | 68 | — | 48 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 415 | 217 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 219 | 2583 | 216 | 219 | 216 | 24 | 24 | 1095 | 178 | 24 | 219 | 1493 |
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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