Surf Forecasts:
Block Island surf forecast from 25 Jul 2026:
- Most powerful swell: Thursday 30 Jul, 11PM (local time) - 4.5ft (1.4m), 10s period, SSE swell with 370 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 1.4m 10s and forecast to arrive on Thursday (Jul 30) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Thursday (Jul 30) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Thu 30th Jul) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what we've got coming up for the Block Island area. I won't sugarcoat it—we're in for a long stretch of flat or junky conditions before a brief window of hope shows up.
The outlook kicks off Saturday the 25th of July and the truth is, almost the entire 16-day run is a write-off. We've got a nearly two-week stretch of poor surf, with the first sign of anything decent not showing until Monday the 3rd of August.
From Saturday the 25th right through to Sunday the 2nd of August, it's grim. The swell is small, the period is short, and the wind is almost always from the wrong direction. Expect a lot of cross-onshore and onshore slop. The combined wave energy barely gets into three digits and when it does, like on Wednesday the 29th (208), it's a short-period, wind-chopped mess. The only exception is Thursday the 30th of July morning. That morning sees a 7ft swell from the ENE, but it's short period and while the wind is clean from the WNW, the wave comment says it's only marginal. Not something to get excited about.
Now, let's jump to Monday the 3rd of August. This is the one standout in the whole run. The morning at Block Island is looking clean, real clean. We've got glassy conditions with a 5ft SSE swell. The period is still a modest 8 seconds, but the energy is picking up at 287 (moderate). The wind is glassy—that’s a major positive. Trust me, after two weeks of crap, a morning of glassy 5ft surf at a point break like Block Island is a gift. Because this spot rarely breaks, you need to be on it when it does. The water temp is running a bit colder than normal for the time of year at about 68°, so don't forget a hood if you're a cold water wimp.
Tuesday the 4th of August morning will be glassy again with a 4ft S swell and combined energy of 163, but the conditions are only described as "surfable but very ordinary." It's a step down from Monday morning. After that, it's back to mediocrity for the rest of the run.
So, if you want the best of a bad lot, set your alarm for Monday morning the 3rd of August at Block Island (United States). Don't be late. It's your only real shot.
- Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Sat afternoon, min 17°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 65mm), heaviest during Wed afternoon. Warm (max 23°C on Thu afternoon, min 18°C on Wed night). Winds increasing (light winds from the S on Tue afternoon, strong winds from the N by Wed night). | |||||||||||||||||||
Sat 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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) | ESE 7 | ESE 7 | ESE 8 | ESE 8 | SE 7 | SE 7 | SE 7 | SE 8 | SSE 7 | SE 8 | SSE 5 | E 5 | E 7 | E 6 | ENE 6 | NE 6 | SSE 10 | S 9 | S 9 | S 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 113 | 120 | 99 | 88 | 54 | 44 | 34 | 58 | 84 | 36 | 63 | 136 | 316 | 212 | 299 | 219 | 335 | 169 | 122 | 86 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | on | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross | off | cross-off | cross-on | cross-off | cross-off | cross | cross-off |
High Tide | 6:20PM0.87m | 6:36AM0.66m | 7:04PM0.89m | 7:22AM0.70m | 7:44PM0.91m | 8:03AM0.75m | 8:20PM0.92m | 8:42AM0.79m | 8:52PM0.93m | 9:17AM0.82m | 9:22PM0.93m | 9:50AM0.84m | 9:54PM0.92m | |||||||
Low Tide | 00:49AM0.18m | 12:20PM0.17m | 1:30AM0.14m | 1:04PM0.14m | 2:08AM0.11m | 1:45PM0.12m | 2:43AM0.07m | 2:24PM0.11m | 3:15AM0.05m | 3:01PM0.11m | 3:42AM0.04m | 3:37PM0.11m | 4:06AM0.04m | |||||||
 |  | | | | | | | | |  |  |  |  |  |  | | | |  | |
 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — |
 | 8:09 | — | — | 8:08 | — | — | 8:07 | — | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | — | 8:04 | — |
mm | — | — | — | — | — | — | — | — | — | — | 3 | 8 | 41 | 13 | — | — | — | — | — | — |
Temp °C | 21 | 20 | 19 | 21 | 20 | 19 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 19 | 21 | 23 | 23 | 21 | 23 | 23 |
Feels °C | 18 | 17 | 16 | 19 | 19 | 18 | 18 | 18 | 21 | 19 | 20 | 18 | 17 | 15 | 18 | 21 | 21 | 19 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 6 | ESE 7 | ESE 8 | ESE 8 | SE 7 | SE 7 | SE 7 | SE 8 | E 6 | SE 8 | E 8 | SSE 8 | S 8 | SSE 9 | S 8 | SSE 8 | SSE 10 | S 9 | S 9 | S 8 |
| kJ | 1 | 120 | 99 | 88 | 54 | 44 | 34 | 58 | 3 | 36 | 5 | 63 | 302 | 197 | 239 | 207 | 335 | 169 | 122 | 86 |
Swell 2 Height (m) Direction Period (s) | — | S 5 | S 5 | S 6 | E 5 | ENE 6 | E 6 | E 6 | S 7 | E 6 | E 9 | SW 6 | — | SSW 8 | ESE 7 | — | — | ENE 7 | ENE 7 | ENE 7 |
| kJ | — | 1 | 1 | 3 | 12 | 11 | 11 | 6 | 8 | 3 | 6 | 9 | — | 167 | 70 | — | — | 20 | 10 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 8 | E 6 | E 9 | — | — | — | SSE 7 | — | — | — | SE 10 | SE 10 | SE 9 |
| kJ | — | — | — | — | — | — | — | 5 | 6 | 2 | — | — | — | 17 | — | — | — | 4 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | ESE 7 | — | NE 3 | ENE 6 | — | — | — | — | SSE 7 | S 4 | SSE 5 | E 5 | E 7 | E 6 | ENE 6 | NE 6 | NE 6 | — | — | SSW 3 |
| kJ | 113 | — | 2 | 28 | — | — | — | — | 84 | 15 | 63 | 136 | 316 | 212 | 299 | 219 | 67 | — | — | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 605 | 24 | 24 | 749 | 24 | 775 | 1804 | 24 | 634 | 1804 | 410 | 156 | 141 | 25 | 24 | 24 | 24 | 24 | 24 | 24 |
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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