Surf Forecasts:
Block Island surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 5AM (local time) - 6ft (1.8m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 2AM (local time) - 7ft (2.1m), 7s period, SSW swell with 385 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 6ft (1.8m), 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 Monday (Aug 17) at 5AM. The primary swell is predicted to be 1.8m and 7s period. 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 2.1m 7s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 15) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 6ft (1.8m) 7s |
| Best Surf | 5AM (Mon 17th Aug) | 6ft (1.8m) 7s |
| Most Powerful | 2AM (Mon 17th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be real with you. The next couple of weeks are looking pretty bleak for paddle surfing around Block Island. We’ve got a long stretch of tiny, weak, and choppy conditions ahead. But I’ve dug through all the numbers, and there are a couple of windows that might get your heart pumping, even if they're a fair way off.
The first real glimmer of hope shows up on August 17th, that Monday morning. The swell bumps up to a clean 6ft from the SSW, and we’ve got a gentle WNW offshore breeze keeping the surface glassy. It's a short-period swell at 8 seconds, so it won’t have the punch of a groundswell, but the energy jumps to a moderate 382. This is about the best we see in the first week, and it’s driveable. The point break is rarely breaking, so if you see it working, you know it’s special. It's an intermediate wave, so it’s not for the faint of heart. The water temp is 71°F, which is right about normal for this time of year, so no surprises there.
Don't get too excited for the afternoon of the 17th, though. The wind swings cross-on and it turns to mush. After that, it’s back to the doldrums. We've got a dead stretch of days where the swell drops way down, below 2ft, and the winds are all over the place. The period stretches out to 11 seconds around the 19th, but there’s no size or direction to it, and it’s just not enough to push the point.
The next potential standout is way off, on August 27th, a Thursday. The swell shows a head-high 6ft from the ENE, with a moderate energy of 272. The wind is cross-shore in the morning, so it might be a bit lumpy, but it's a longer-period swell at 6 seconds... well, actually, it's still short. It’s not a perfect setup, but it’s the biggest and most organized swell we see in the second week. But keep in mind, this is a long-range call, so treat it as promising but not locked in. That ENE direction, though, is not the ideal SE the point loves, so it might be a bit close-outs.
All in all, the next 16 days are a test of patience. The surf is looking small and inconsistent. But as we know, this stretch of coast can turn on a dime, and with a few of these windows showing some life, it won’t stay flat forever. Keep your eyes on that morning of the 17th and that late-month pulse on the 27th. Otherwise, keep the board in the car and the wax in the pocket.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu morning. Warm (max 27°C on Thu night, min 18°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sun night. Warm (max 26°C on Mon night, min 19°C on Tue morning). Winds decreasing (near gales from the SSW on Sun night, calm by Tue night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | SW 4 | SW 4 | SSW 5 | SSW 5 | ESE 9 | ESE 9 | ESE 9 | SSE 6 | S 6 | SSW 6 | S 5 | SSW 7 | SSW 7 | S 7 | S 7 | S 6 | S 6 | SE 12 | SE 11 | SE 10 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12 | 17 | 16 | 9 | 8 | 8 | 8 | 4 | 6 | 29 | 62 | 385 | 215 | 155 | 77 | 38 | 27 | 66 | 57 | 48 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | off | cross-off | cross | cross-off | cross-off | on | cross-on | cross-on | cross-on | cross | off | cross-on | cross-off | cross-off | on | glassy | on | cross-on | cross-on |
High Tide | 8:53AM1.03m | 9:14PM1.05m | 9:42AM1.05m | 9:59PM0.99m | 10:29AM1.05m | 10:44PM0.92m | 11:16AM1.01m | 11:28PM0.84m | 12:04PM0.96m | 00:13AM0.76m | 12:54PM0.90m | 1:02AM0.69m | 1:51PM0.84m | 1:59AM0.63m | |||||||
Low Tide | 3:00PM-0.05m | 3:38AM-0.05m | 3:53PM-0.02m | 4:17AM-0.03m | 4:44PM0.02m | 4:52AM0.02m | 5:35PM0.08m | 5:24AM0.07m | 6:30PM0.15m | 5:54AM0.13m | 7:31PM0.20m | 6:30AM0.19m | 8:37PM0.25m | ||||||||
 |  |  |  | | | | | | |  |  | | | | | | | | |  | |
 | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:40 | — | — | 7:39 | — |
mm | 3 | — | — | — | — | — | — | — | — | — | — | 9 | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 26 | 27 | 24 | 26 | 25 | 20 | 22 | 22 | 22 | 22 | 24 | 23 | 25 | 26 | 21 | 22 | 22 | 22 | 24 | 24 |
Feels °C | 23 | 24 | 24 | 22 | 23 | 21 | 17 | 20 | 20 | 19 | 18 | 22 | 24 | 26 | 27 | 20 | 21 | 23 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SE 10 | SSW 5 | SSW 5 | ESE 9 | ESE 9 | NE 4 | SE 9 | S 6 | SE 9 | — | — | SSW 7 | S 7 | S 7 | S 6 | S 6 | S 6 | SE 11 | SE 10 | SE 9 |
| kJ | 3 | 4 | 16 | 9 | 8 | 8 | 2 | 3 | 6 | 12 | — | — | 215 | 155 | 77 | 38 | 27 | 19 | 57 | 48 | 29 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 8 | ESE 9 | ESE 9 | SE 13 | SSW 5 | ESE 9 | SSE 6 | SE 9 | SE 6 | — | — | — | — | SE 8 | SE 8 | SE 8 | SE 12 | S 6 | — | — |
| kJ | 3 | 2 | 8 | 8 | 7 | 2 | 8 | 4 | 3 | 1 | — | — | — | — | 18 | 17 | 16 | 66 | 11 | — | — |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 13 | SE 13 | N 3 | — | S 6 | S 6 | S 6 | SE 6 | — | — | — | — | — | S 16 | SSE 14 | SSE 13 | — | — | — | — |
| kJ | 4 | 7 | 7 | 1 | — | 1 | 2 | 2 | 2 | — | — | — | — | — | 5 | 18 | 16 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 4 | NW 3 | WNW 2 | SW 3 | NNE 4 | NNW 3 | — | SSW 3 | SSW 6 | S 5 | SSW 7 | NNW 3 | WSW 4 | NNW 3 | NNE 3 | — | SSW 2 | — | S 6 | S 4 |
| kJ | 12 | 17 | 5 | 1 | 7 | 14 | 2 | — | 1 | 29 | 62 | 385 | 3 | 12 | 3 | 2 | — | 1 | — | 16 | 15 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3423 | 2569 | 642 | 767 | 3426 | 769 | 2530 | 2551 | 1679 | 1687 | 1700 | 29 | 0 | 24 | 24 | 25 | 634 | 24 | 605 | 966 | 195 |
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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