Surf Forecasts:
Block Island surf forecast from 26 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 11AM (local time) - 2ft (0.6m), 11s period, SE swell with 97 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 0.6m 11s and forecast to arrive on Wednesday (Sep 02) at 11AM. 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 29) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Wed 2nd Sep) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, I'll level with you – the next 16 days at Block Island (Block Island) are a total bust. There's not a single session worth paddling out for. The whole stretch is flat and messy.
Looking at the whole run, from the 26th of August right through to the 10th of September, it's all "poor surf conditions" with not a single recommendation above a zero. That's a solid two-week gap of nothing.
The water temperature is sitting at 70°, which is a touch cooler than normal for this time of year – about average.
We get a few little pulses of energy, but nothing that ever gets it together. The swell is tiny, mostly around 1ft to 3ft from the SE or E, with periods that are painfully short – 8 seconds or less. The combined energy never gets above 175 (weak), so there's just no push.
The winds are a constant problem too. A lot of cross-on and cross-shore slop from the SW and S, and even when we get a clean window like Saturday morning the 29th with a light NE cross-off, the swell is only 2ft. That afternoon goes glassy, but it's still just 2ft. There's a moment on the 2nd of September with a bit more period (11 seconds) from the SE, but the size is still tiny and the combined energy is only 121. It's just not enough.
Late in the run, around the 8th and 9th of September, the swell bumps up to 5ft from the S, but the period drops to a pathetic 6 seconds and the wind is howling onshore or cross-on, with heavy rain and thunderstorms. That's more of a kite-surfing mess than anything for a paddle surfer.
Bottom line: Block Island is a rare-break spot at the best of times, and this forecast is a total blank. Don't bother checking the cams for a while.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 25°C on Fri afternoon, min 19°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 24°C on Sun night, min 18°C on Sat morning). Winds increasing (light winds from the ESE on Sat afternoon, fresh winds from the SW by Sun night). | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SSW 6 | S 6 | SE 8 | SE 8 | SSW 7 | SE 8 | SE 8 | SE 8 | SSW 6 | SW 4 | SW 5 | SW 5 | SSW 5 | SE 6 | SE 8 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 62 | 72 | 70 | 74 | 77 | 77 | 78 | 75 | 69 | 50 | 38 | 34 | 35 | 25 | 26 | 48 | 37 | 17 | 10 | 11 | 30 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | off | cross-off | cross-on | cross | cross | cross | cross-off | off | cross | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 11:05AM1.00m | 11:30PM0.83m | ||||||||
Low Tide | 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 | 5:25PM0.09m | ||||||||
 | |  |  | |  | | | | | |  | | |  | | | |  |  |  | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — |
mm | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | 2 | — | — | — | 5 | 3 | 10 |
Temp °C | 20 | 23 | 23 | 24 | 24 | 24 | 24 | 25 | 25 | 19 | 21 | 22 | 21 | 22 | 24 | 22 | 23 | 23 | 23 | 22 | 23 |
Feels °C | 19 | 21 | 22 | 23 | 23 | 22 | 26 | 26 | 27 | 17 | 21 | 22 | 21 | 20 | 24 | 21 | 21 | 23 | 24 | 20 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | S 6 | SSW 6 | SE 8 | SSW 7 | SSW 7 | S 6 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 5 | SSW 5 | SSW 5 | SE 9 |
| kJ | 62 | 72 | 70 | 74 | 77 | 74 | 78 | 50 | 69 | 49 | 35 | 19 | 35 | 25 | 17 | 23 | 10 | 17 | 4 | 4 | 30 |
Swell 2 Height (m) Direction Period (s) | SW 4 | S 6 | S 6 | E 8 | E 11 | E 11 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | SE 8 | SSW 6 | — | — | — | SSE 7 | SE 7 | SE 6 | SE 8 | SSW 5 |
| kJ | 6 | 3 | 6 | 1 | 9 | 2 | 55 | 75 | 41 | 50 | 38 | 34 | 10 | — | — | — | 4 | 9 | 10 | 11 | 4 |
Swell 3 Height (m) Direction Period (s) | E 6 | — | — | — | — | — | E 10 | E 10 | S 8 | E 9 | E 9 | ENE 4 | E 8 | E 9 | — | — | SSE 6 | SE 6 | SE 10 | SSE 6 | SE 12 |
| kJ | 1 | — | — | — | — | — | 2 | 2 | 1 | 2 | 2 | 3 | 1 | 2 | — | — | 4 | 1 | 4 | 3 | 23 |
Wind waves Height (m) Direction Period (s) | WSW 4 | SW 6 | SW 4 | SSW 6 | SSW 4 | SSW 6 | — | — | — | NE 4 | ENE 4 | — | — | SSW 6 | SW 4 | SW 5 | SW 5 | — | — | ENE 3 | E 4 |
| kJ | 7 | 18 | 7 | 18 | 34 | 77 | — | — | — | 18 | 15 | — | — | 21 | 26 | 48 | 37 | — | — | 2 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 1084 | 133 | 133 | 1148 | 152 | 24 | 24 | 24 | 49 | 24 | 221 | 776 | 878 | 249 | 24 | 775 | 1156 | 2434 | 1157 | 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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