Surf Forecasts:
Block Island surf forecast from 10 Aug 2026:
- Best quality surf: Monday 17 Aug, 5AM (local time) - 7ft (2.1m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 5AM (local time) - 7ft (2.1m), 7s period, SSW swell with 443 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 7ft (2.1m), 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 2.1m and 7s period with a secondary swell of 0.1m and 12s. 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 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Aug 14) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 7ft (2.1m) 7s |
| Best Surf | 5AM (Mon 17th Aug) | 7ft (2.1m) 7s |
| Most Powerful | 5AM (Mon 17th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let’s get into it.
To be straight with you, the next couple of weeks are looking pretty bleak for a proper surf around here. We’ve got a long stretch of nothing but small, weak, and messy conditions. From now through the 16th, it’s all poor surf with waves hanging around the 2ft to 3ft mark, and the odd bump to 5ft late on the 16th that’s just too chopped up by onshore wind to be any fun. The energy is weak, with combined swell readings mostly in the 20s to 80s, so you’re not missing anything.
The first real glimmer of hope shows up on Monday the 17th. A pulse of SSW swell pushes the surf up to 6ft in the morning, dropping to 5ft in the afternoon. The wind finally goes offshore from the NNW, and the conditions clean right up. The energy jumps to 339 in the morning and 251 in the afternoon, which is a solid step up. This is a point break we’re talking about, so that long-period energy from the SSW is going to wrap in nicely. It’s the standout of the whole window, no doubt. But keep in mind, this break rarely breaks, so when it does, it’s special. Just be prepared for a crowd, because it’s often pretty busy when it’s on.
After that high point, things get messy again. The wind swings around and we get a lot of cross-onshore junk, with short-period SE swell that just doesn’t have any push. The energy is moderate at times, but the waves are small and the quality is poor. There’s a brief window on Saturday the 22nd with a morning offshore breeze and 5ft of SE swell, but the period is only 6 seconds, so it’s going to be a bit soft and crumbly. It’s marginal at best.
The rest of the forecast into the 25th is just more of the same – small, weak, and mostly onshore. There’s nothing that gets the heart pumping.
So, if you’ve got to get wet, your window is Monday the 17th. Otherwise, it might be time to check the surf report again later.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 26°C on Mon afternoon, min 22°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu night, min 17°C on Sat morning). Winds decreasing (fresh winds from the SW on Thu afternoon, calm by Fri afternoon). | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 6 | S 5 | S 6 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | S 6 | SSW 6 | SSW 6 | S 5 | SSW 6 | S 6 | S 7 | S 7 | S 8 | S 8 | S 7 | SSW 7 | SSW 5 | SSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 13 | 11 | 36 | 34 | 17 | 25 | 16 | 21 | 28 | 27 | 36 | 35 | 33 | 46 | 74 | 72 | 52 | 38 | 80 | 430 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross | off | cross-off | on | cross-on | cross | cross | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:44PM1.08m | 7:08AM0.90m | 7:37PM1.09m | 8:02AM0.97m | 8:27PM1.09m | 8:53AM1.03m | 9:14PM1.05m | 9:42AM1.05m | 9:59PM0.99m | 10:29AM1.05m | 10:44PM0.92m | 11:16AM1.01m | 11:28PM0.84m | ||||||||
Low Tide | 12:02PM-0.01m | 1:27AM0.00m | 1:07PM-0.05m | 2:13AM-0.03m | 2:05PM-0.06m | 2:57AM-0.05m | 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 | ||||||||
 |  |  | | |  | | |  | | | | | | | | | | | |  | |
 | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — |
mm | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 |
Temp °C | 22 | 26 | 26 | 24 | 26 | 24 | 23 | 24 | 24 | 25 | 25 | 26 | 22 | 23 | 22 | 20 | 21 | 22 | 23 | 23 | 23 |
Feels °C | 21 | 24 | 25 | 24 | 25 | 24 | 21 | 23 | 22 | 25 | 23 | 26 | 21 | 23 | 20 | 18 | 19 | 20 | 21 | 20 | 23 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 5 | S 6 | SSW 6 | ESE 9 | SSW 5 | SSW 6 | S 6 | SSW 6 | SE 8 | S 5 | SSW 6 | S 6 | S 7 | S 7 | S 8 | S 8 | S 7 | SSW 7 | SE 8 | — |
| kJ | 15 | 13 | 11 | 36 | 8 | 17 | 25 | 16 | 21 | 3 | 27 | 36 | 35 | 33 | 46 | 74 | 72 | 52 | 38 | 3 | — |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | E 8 | ESE 9 | SE 8 | ENE 3 | ESE 8 | SE 10 | SE 8 | ESE 9 | ESE 9 | ESE 9 | SE 9 | SE 9 | ENE 4 | ESE 9 | SE 9 | — | — |
| kJ | 4 | 4 | 4 | 3 | 1 | 7 | 3 | 2 | 7 | 4 | 3 | 8 | 8 | 8 | 3 | 3 | 3 | 8 | 3 | — | — |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | — | E 8 | E 8 | SE 8 | — | SE 14 | SE 10 | SE 13 | SE 13 | S 13 | E 12 | SE 12 | SE 9 | — | — | — | — |
| kJ | 1 | 1 | 1 | 1 | — | 1 | 1 | 3 | — | 7 | 4 | 7 | 7 | 3 | 3 | 6 | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SW 4 | — | SSW 6 | NNW 2 | NE 3 | — | SW 3 | SSW 6 | E 3 | — | NW 3 | W 4 | N 4 | NE 4 | — | SW 3 | WSW 3 | SSW 5 | SSW 7 |
| kJ | — | — | 6 | — | 34 | 1 | 6 | — | 4 | 28 | 1 | — | 2 | 12 | 18 | 8 | — | 5 | 2 | 80 | 430 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 769 | 397 | 99 | 49 | 2500 | 767 | 1804 | 642 | 642 | 49 | 195 | 85 | 49 | 49 | 634 | 25 | 634 | 642 | 642 | 1158 | 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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