Surf Forecasts:
Block Island surf forecast from 24 Aug 2026:
- Best quality surf: Saturday 29 Aug, 5AM (local time) - 3.5ft (1.1m), 7s period, S swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 11PM (local time) - 3.5ft (1.1m), 8s period, S swell with 153 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 5AM (local time) - 3.5ft (1.1m), 7s period with S 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 Saturday (Aug 29) at 5AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.6m and 8s. 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 1.1m 8s and forecast to arrive on Friday (Aug 28) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Wednesday (Aug 26) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 29th Aug) | 3.5ft (1.1m) 7s |
| Best Surf | 5AM (Sat 29th Aug) | 3.5ft (1.1m) 7s |
| Most Powerful | 11PM (Fri 28th Aug) | 3.5ft (1.1m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let me tell you how it is for Block Island. It’s a rare-breakin’ point break that lights up when the stars align, but don’t go gettin’ your hopes up too quick. There’s a big ol’ gap at the start here with nothin’ worth paddlin’ out for. From the 24th of August all the way through to the 1st of September, it’s flat or junk – tiny windswell, messy winds, just poor conditions day after day. You’re lookin’ at a solid week-plus of nothin’ doin’. The water temp is about average for this time of year, so no surprises there.
Then, on Wednesday the 2nd of September, we finally get a little glimmer. Morning looks like the only real window in the whole 16 days. Swell bumps up to about 3ft from the SE, that’s a decent direction for Block Island, and the period is 13 seconds, so it’s got a little bit of groundswell push. The combined energy is moderate at 277, and the wind is light out of the NW – that’s cross-offshore, so it’ll be clean. The score ain’t high, but it’s the best you’ll see. That morning is the only time I’d bother. By the afternoon, the wind swings SW and picks up, puttin’ a chop on it. Crowds are often a thing here, but on a Wednesday like that with small surf, it might not be too bad.
After that, Thursday the 3rd gets a bigger pulse – about 5ft from the SE, with very strong wave energy (928), but the wind cranks out of the NE at 28 mph. That’s a mess. Even though it’s cross-offshore, that much wind will shred any chance of a clean wave. Friday the 4th has clean conditions in the morning with a 3ft SE swell and period of 12 seconds, but the energy is only moderate (223) and the wind is howlin’ from the W at 16 mph. It’s clean, but the wind is strong. Not worth gettin’ wet for. After that, it fades right back into tiny dribble for the rest of the run. No other standouts.
So here’s the bottom line: if you’re desperate, the morning of Wednesday the 2nd of September is your only real chance. Small, clean, and with a little groundswell character. Otherwise, this 16-day forecast is a bust. Block Island is a fickle mistress, and she ain’t smilin’ right now.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Sun night, min 18°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Thu night. Warm (max 25°C on Sat afternoon, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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) | SSE 6 | S 6 | S 6 | SSW 6 | SE 11 | SE 10 | SE 10 | ESE 9 | SE 9 | SE 8 | SE 9 | SE 9 | SSW 6 | S 6 | S 6 | S 7 | SSW 6 | SSW 6 | S 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 85 | 64 | 62 | 53 | 29 | 17 | 25 | 52 | 79 | 69 | 81 | 83 | 94 | 59 | 55 | 152 | 66 | 51 | 36 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-off | cross-off | cross | off | cross-off | cross | cross | cross-on | cross-on | on | cross | cross | cross | cross-off | cross | off |
High Tide | 6:12AM0.69m | 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 | |||||||
Low Tide | 00:18AM0.20m | 12:06PM0.18m | 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 | ||||||
 |  | | | | | | | | |  |  |  |  | |  | | |  | |
 | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | 7:34 | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 | — | — | — |
Temp °C | 24 | 23 | 24 | 24 | 21 | 22 | 23 | 19 | 23 | 23 | 24 | 24 | 23 | 20 | 22 | 24 | 23 | 25 | 25 |
Feels °C | 23 | 21 | 21 | 21 | 19 | 19 | 22 | 18 | 20 | 22 | 23 | 23 | 22 | 19 | 23 | 25 | 23 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | S 6 | SE 11 | SSW 6 | S 6 | SE 6 | SW 4 | ESE 9 | SE 9 | SE 8 | SE 9 | SE 9 | SE 8 | S 6 | S 6 | S 7 | SSW 6 | SSW 6 | S 6 |
| kJ | 85 | 64 | 19 | 53 | 17 | 10 | 6 | 52 | 79 | 69 | 81 | 83 | 58 | 59 | 52 | 152 | 66 | 51 | 36 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | E 6 | SE 11 | SE 6 | SSW 6 | SE 10 | SE 5 | ESE 9 | S 6 | E 8 | E 11 | E 11 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
| kJ | 22 | 21 | 3 | 18 | 10 | 6 | 25 | 1 | 35 | 3 | 1 | 2 | 2 | 57 | 55 | 58 | 23 | 22 | 24 |
Swell 3 Height (m) Direction Period (s) | S 6 | E 6 | — | ESE 7 | SE 11 | SE 10 | ESE 6 | S 6 | — | E 12 | — | — | — | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 |
| kJ | 3 | 3 | — | 4 | 29 | 17 | 7 | 1 | — | 3 | — | — | — | 2 | 2 | 2 | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | WSW 4 | — | S 6 | — | — | WSW 2 | NNW 2 | SW 5 | SW 3 | SW 4 | SSW 4 | SSW 4 | SSW 6 | — | — | — | — | — | — |
| kJ | 3 | — | 62 | — | — | 1 | 1 | 7 | 6 | 6 | 10 | 34 | 94 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 24 | 26 | 221 | 24 | 85 | 198 | 49 | 29 | 26 | 133 | 159 | 1084 | 141 | 24 | 24 | 24 | 24 | 24 | 29 |
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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