Surf Forecasts:
Block Island surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 11PM (local time) - 4.5ft (1.4m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 11PM (local time) - 4.5ft (1.4m), 7s period, SSW swell with 168 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 11PM (local time) - 4.5ft (1.4m), 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 Friday (Aug 28) at 11PM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.6m and 8s. Another secondary swell of 0.1m and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 1.4m 7s and forecast to arrive on Friday (Aug 28) 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 0.4m 3s period and expected on Tuesday (Aug 25) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 28th Aug) | 4.5ft (1.4m) 7s |
| Best Surf | 11PM (Fri 28th Aug) | 4.5ft (1.4m) 7s |
| Most Powerful | 11PM (Fri 28th Aug) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, I’m looking at this 16-day run for Block Island, and honestly, it’s a tough one. The start is a total write-off. We’ve got a solid 8 days or so with nothing really worth paddling out for – small, choppy, onshore junk. It’s one of those stretches where you’re better off doing something else.
Block Island is a point break, and it rarely breaks, so we’re already up against it. For the first week and a half, the swell is tiny, the wind is all over the place, mostly onshore or cross, and the combined swell energy is weak, mostly under 100 with some days barely pushing past. The water temp is 69°, which is about 1° cooler than average for this time of year, so nothing to write home about there.
Things start to look a bit more interesting heading into the first week of September. Friday morning, the 4th of September, we get some size pushing 6 ft from the ESE. The wind is off, strong at 28 mph, but it’s clean. The combined energy jumps to over 1000 (1084) – that’s some serious juice. That said, it’s pushing that 8 ft mark for experts only, so if you’re not on it, stay out. The period is a short 8 seconds, so it’ll be a bit fat and dumpy, but at least it’s clean.
The real standout, the best on offer in this whole outlook, is Saturday, the 5th of September. The swell drops a touch to a more manageable 4 ft from the E, still with a short 8-second period. The wind is light at 6 mph and cross-offshore. It’s clean. The energy is still solid at 335. This is the session. It’s not perfect, the period is short, but for a spot that rarely breaks and has been flat for over a week, this is your window. Crowds can be likely here, so get in early.
Sunday morning, the 6th, is worth a mention too. Clean, light offshore wind from the WNW, with 3 ft from the ESE. The energy is 276. It’s a smaller, cleaner follow-up to Saturday. Don’t expect much after that, though – it turns messy again.
So, don’t get too excited for the first week. The real promise is that first weekend of September. Saturday the 5th is the pick.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 18°C on Wed morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Warm (max 24°C on Thu afternoon, min 18°C on Sat morning). Wind will be generally light. | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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) | SSW 6 | SSW 6 | SE 11 | SW 4 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | ESE 8 | SE 9 | S 6 | S 7 | SSW 7 | S 6 | SSW 6 | SSW 6 | SE 8 | SE 8 | SSW 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 66 | 66 | 29 | 28 | 26 | 61 | 77 | 70 | 70 | 43 | 77 | 57 | 89 | 145 | 86 | 68 | 56 | 35 | 25 | 66 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | on | cross | cross-on | off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:36PM0.86m | 6:56AM0.76m | 7:13PM0.89m | 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 | |||||||
Low Tide | 00:57AM0.14m | 12:50PM0.15m | 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 | |||||||
 |  | | | | | |  |  |  |  |  | | | | | | | | | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | 4 | 1 | — | 2 | — | — | — | — | — | — |
Temp °C | 25 | 24 | 21 | 22 | 23 | 20 | 23 | 23 | 23 | 24 | 23 | 24 | 24 | 24 | 21 | 23 | 23 | 22 | 23 | 23 |
Feels °C | 23 | 22 | 18 | 18 | 20 | 19 | 19 | 21 | 21 | 23 | 22 | 25 | 24 | 25 | 17 | 22 | 21 | 21 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SSW 6 | S 6 | SE 10 | SW 5 | SE 9 | SE 9 | SE 8 | SE 8 | ESE 8 | SE 9 | S 6 | SE 8 | SSW 7 | S 6 | SSW 6 | SSW 6 | SSW 6 | SE 8 | SE 8 |
| kJ | 19 | 66 | 16 | 17 | 18 | 61 | 77 | 70 | 70 | 43 | 77 | 39 | 54 | 145 | 86 | 68 | 56 | 22 | 25 | 17 |
Swell 2 Height (m) Direction Period (s) | E 6 | SE 11 | ESE 6 | SE 6 | SE 10 | SW 4 | SE 10 | S 6 | — | SE 9 | SW 5 | SE 8 | E 10 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | — | — |
| kJ | 3 | 18 | 8 | 10 | 26 | 5 | 4 | 2 | — | 31 | 9 | 57 | 2 | 40 | 23 | 23 | 34 | 35 | — | — |
Swell 3 Height (m) Direction Period (s) | — | E 7 | SE 11 | E 6 | ESE 6 | E 6 | — | — | — | — | E 11 | E 10 | — | E 9 | E 9 | — | — | — | E 9 | — |
| kJ | — | 4 | 29 | 1 | 3 | 1 | — | — | — | — | 2 | 2 | — | 2 | 2 | — | — | — | 2 | — |
Wind waves Height (m) Direction Period (s) | SSW 6 | — | W 3 | SW 4 | NW 3 | SW 4 | SW 3 | SW 4 | SSW 3 | SW 4 | S 5 | — | S 7 | — | N 3 | — | NW 2 | — | S 6 | SSW 5 |
| kJ | 66 | — | 3 | 28 | 1 | 5 | 6 | 9 | 4 | 8 | 37 | — | 89 | — | 1 | — | 1 | — | 17 | 66 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 24 | 24 | 159 | 198 | 49 | 24 | 1084 | 133 | 133 | 608 | 198 | 25 | 26 | 0 | 24 | 24 | 24 | 645 | 743 | 249 |
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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