Surf Forecasts:
Block Island surf forecast from 26 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 8PM (local time) - 2.5ft (0.7m), 9s period, SE swell with 77 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 0.7m 9s and forecast to arrive on Wednesday (Aug 26) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Wednesday (Aug 26) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Wed 26th Aug) | 2.5ft (0.7m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s coming up for the next couple of weeks.
Well, I’m not gonna sugarcoat it – we’ve got a long, quiet stretch ahead. The whole 16-day window is basically a blank run. There’s no standout surf on offer, no real swell to get excited about. The first few days are a write-off, and it stays that way right through until early September. The swell energy is weak, with combined energy values mostly in the 40s to 90s, just a few nudging into the low 100s, but nothing that will get your heart rate up. The water temperature is sitting at 69°F in the early part, which is about normal for this time of year – nothing weird there.
The only break we have to work with is Block Island, a point break that rarely breaks. It’s exposed to the SE, but the optimum swell direction is from the SE, so that’s a bit of a tease. The swell direction we’re seeing is mostly from the S or SW, so it’s not even hitting the right angle. The wind is often cross or cross-onshore, with a few clean spells, but there’s just no power in the water to make anything of it.
For a bit of context, even the cleanest windows – like Wednesday morning the 26th with light offshore winds, or Saturday morning the 29th with a gentle cross-off – the waves are only 2 ft. That’s ankle-knocker stuff. The longest period we see is 14 seconds on September 1st, but that’s with a tiny 1.0 ft swell. It’s a classic case of a long-period groundswell that’s just got no energy. Paddling out would be easy, but you’d be bobbing around.
The only real flicker of something is Wednesday morning September 9th, with a 3 ft ESE swell, period 9 seconds, and a clean cross-off wind from the WNW. The combined energy climbs to 127, which is the highest we see. But that’s over a week away, and given the track record, it’s still not going to amount to much. For an intermediate surfer, Block Island is a tough spot at the best of times, and with the crowds listed as “often,” even if it did break, you’d be sharing the one or two rideable waves with a bunch of people.
If you’re a kite surfer, the setup might be more interesting than paddle surfing, because the wind is at least present and the chop is often there. But for a regular surfer, this is a period to leave the boards in the car, or plan a trip. It’s not personal, it’s just the season. This kind of blank run is normal for the area at this time of year.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 24°C on Thu morning, min 18°C on Wed morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 18°C on Sat morning). Winds increasing (light winds from the SE on Sat afternoon, fresh winds from the SW by Sun night). | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SE 8 | S 6 | SE 8 | S 7 | S 7 | ESE 8 | S 6 | SE 8 | SE 8 | SW 5 | SW 5 | SSW 5 |
Wave Graph  | |||||||||||||||||||
 kJ | 26 | 62 | 72 | 70 | 74 | 77 | 72 | 57 | 54 | 51 | 73 | 55 | 45 | 18 | 35 | 24 | 40 | 31 | 19 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | off | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross |
High Tide | 7:35AM0.82m | 7:47PM0.91m | 8:10AM0.87m | 8:18PM0.93m | 8:43AM0.91m | 8:50PM0.94m | 9:14AM0.95m | 9:25PM0.94m | 9:47AM0.98m | 10:03PM0.92m | 10:23AM0.99m | 10:44PM0.88m | |||||||
Low Tide | 1:31AM0.09m | 1:30PM0.11m | 2:02AM0.05m | 2:08PM0.09m | 2:30AM0.02m | 2:43PM0.07m | 2:55AM0.01m | 3:19PM0.05m | 3:22AM0.00m | 3:56PM0.05m | 3:52AM0.01m | 4:38PM0.06m | 4:27AM0.03m | ||||||
 |  | |  | |  |  |  | | | | | | | | | | |  | |
 | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — |
 | 7:30 | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — |
mm | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 20 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 25 | 19 | 21 | 21 | 22 | 23 | 23 | 23 | 27 | 26 |
Feels °C | 21 | 20 | 21 | 22 | 23 | 22 | 23 | 25 | 24 | 25 | 17 | 21 | 21 | 20 | 21 | 20 | 21 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | S 5 | S 6 | SE 8 | S 7 | S 7 | S 6 | S 6 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 5 |
| kJ | 13 | 62 | 72 | 70 | 74 | 77 | 72 | 43 | 41 | 51 | 73 | 55 | 28 | 18 | 35 | 24 | 16 | 10 | 19 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SW 4 | S 6 | S 6 | E 8 | E 11 | E 11 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | ESE 8 | SE 7 | SSW 6 | — | — | S 17 | SE 6 |
| kJ | 26 | 4 | 3 | 6 | 1 | 9 | 2 | 57 | 54 | 30 | 32 | 32 | 45 | 16 | 11 | — | — | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | ESE 6 | E 6 | — | — | — | — | — | E 10 | E 10 | E 9 | E 10 | ESE 5 | SE 9 | SE 8 | E 9 | — | — | — | SE 8 |
| kJ | 3 | 1 | — | — | — | — | — | 2 | 2 | 2 | 2 | 9 | 12 | 11 | 2 | — | — | — | 10 |
Wind waves Height (m) Direction Period (s) | W 4 | — | SW 6 | SW 4 | SSW 4 | SSW 4 | SSW 5 | SW 5 | — | — | NE 2 | — | — | — | — | SW 4 | SW 5 | SW 5 | — |
| kJ | 9 | — | 13 | 10 | 7 | 18 | 69 | 17 | — | — | 1 | — | — | — | — | 14 | 40 | 31 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 198 | 24 | 24 | 1084 | 25 | 133 | 161 | 211 | 152 | 24 | 24 | 24 | 26 | 24 | 24 | 198 | 204 | 339 | 634 |
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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