Surf Forecasts:
Block Island surf forecast from 3 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 2PM (local time) - 8ft (2.5m), 8s period, SSW swell with 970 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 2.5m 8s and forecast to arrive on Thursday (Sep 10) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Sep 06) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 10th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Well, I gotta be straight with you – this outlook for Block Island is a real stinker. Plain and simple, the finder is turning up zero good options across the entire 16-day window. Every single session is flagged as poor surf conditions, so we’re looking at a blank run from now all the way through to September 18th. Honestly, this is one of those spells where the forecasts can change, but right now, there’s nothing to get excited about.
Block Island is a point break that rarely breaks, and that’s a big part of the problem. The swell direction it needs is from the SE, but the little energy that does show up is tiny. The water temp is sitting at 69°F, which is about average for this time of year, with the anomaly at just 0.2°F – nothing unusual there.
We’ve got a few windows where the wind goes clean or glassy, like Friday the 4th and Sunday the 6th in the morning and afternoon, but the swell is pathetic. You’re looking at 1ft to 3ft with weak energy readings (36 to 124). The period is mostly short, around 7 to 9 seconds, so no real grunt. The best looking swell is on Thursday the 10th, with a 7ft SW swell, but that’s a strong cross-shore wind at 25 mph creating messy cross-chop, and the combined energy is a moderate 535. It’s still rated as poor surf, and honestly, with that wind and chop, it’s more of a kite surfing setup than a paddle session.
The end of the run, from the 17th and 18th, is clean but tiny – 0.7ft to 1.0ft swells with long periods (13 seconds) but barely any energy (29 to 50). It’s just not enough to push through.
There’s no standout here, no day to circle on the calendar. This is a tough one. Keep your eyes peeled for a change, but for now, the island’s asleep.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Warm (max 26°C on Fri night, min 16°C on Sat night). Winds increasing (calm on Thu night, fresh winds from the NE by Sat night). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Mon afternoon, min 16°C on Wed morning). Wind will be generally light. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 8 | SSW 6 | SW 6 | SSW 7 | SSW 7 | ENE 7 | E 10 | E 10 | E 10 | E 10 | SW 5 | SW 5 | SSE 9 | SW 5 | SSW 4 | SSW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 49 | 34 | 23 | 23 | 16 | 12 | 9 | 30 | 17 | 41 | 29 | 31 | 31 | 30 | 19 | 16 | 7 | 8 | 27 | 191 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | glassy | cross | off | cross-off | cross-off | cross-off | cross-off | glassy | off | cross-off | cross | cross-off | off | cross-off | cross-off | cross-on | cross-on | cross |
High Tide | 1:21AM0.73m | 1:55PM0.95m | 2:32AM0.71m | 3:13PM0.94m | 3:50AM0.73m | 4:30PM0.96m | 5:02AM0.80m | 5:35PM0.99m | 6:03AM0.88m | 6:31PM1.01m | 6:57AM0.97m | 7:21PM1.02m | ||||||||
Low Tide | 7:52PM0.16m | 6:55AM0.10m | 9:21PM0.17m | 8:08AM0.12m | 10:31PM0.14m | 9:43AM0.11m | 11:29PM0.10m | 11:08AM0.07m | 00:20AM0.05m | 12:13PM0.02m | 1:06AM0.01m | 1:09PM-0.02m | 1:47AM-0.02m | |||||||
 |  | |  |  |  | |  | | |  | | | | | | | |  |  | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — |
 | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — |
mm | 1 | 1 | 1 | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | 11 |
Temp °C | 23 | 24 | 23 | 25 | 26 | 21 | 22 | 20 | 18 | 21 | 21 | 20 | 24 | 23 | 20 | 23 | 23 | 17 | 19 | 22 |
Feels °C | 23 | 25 | 25 | 25 | 25 | 19 | 21 | 16 | 13 | 19 | 19 | 17 | 20 | 18 | 18 | 21 | 20 | 15 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSW 4 | SE 8 | ESE 7 | SE 8 | SSW 6 | SW 6 | SSW 7 | SSW 7 | ENE 7 | E 10 | E 10 | E 10 | E 10 | SW 5 | SW 5 | SW 4 | SW 5 | SE 10 | SE 9 |
| kJ | 49 | 12 | 23 | 15 | 16 | 12 | 8 | 30 | 17 | 41 | 29 | 31 | 31 | 30 | 19 | 16 | 7 | 8 | 15 | 13 |
Swell 2 Height (m) Direction Period (s) | ESE 5 | SE 8 | SSW 4 | SE 8 | ESE 6 | SE 8 | NE 4 | SE 9 | E 8 | SSW 6 | ENE 4 | SE 9 | SE 8 | SE 8 | E 10 | E 9 | SSE 9 | ESE 4 | E 9 | E 9 |
| kJ | 11 | 34 | 7 | 23 | 8 | 9 | 5 | 12 | 11 | 7 | 4 | 3 | 3 | 3 | 16 | 6 | 7 | 5 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | E 6 | E 6 | S 8 | SW 5 | E 6 | ESE 7 | — | SE 9 | E 9 | SSW 6 | S 5 | S 6 | — | SE 9 | SE 9 | E 8 | SE 8 | E 9 | — |
| kJ | — | 7 | 13 | 1 | 6 | 7 | 9 | — | 3 | 7 | 3 | 2 | 1 | — | 3 | 3 | 6 | 3 | 2 | — |
Wind waves Height (m) Direction Period (s) | SW 4 | — | — | SW 4 | NNW 3 | NNE 3 | — | ENE 5 | NE 5 | NE 6 | WSW 3 | NW 3 | SW 3 | WSW 4 | NW 3 | — | SSE 3 | — | SSW 4 | SSW 6 |
| kJ | 16 | — | — | 6 | 1 | 7 | — | 46 | 36 | 35 | 3 | 1 | 9 | 31 | 1 | — | 1 | — | 27 | 191 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 219 | 29 | 49 | 198 | 85 | 634 | 2583 | 157 | 170 | 85 | 85 | 49 | 130 | 138 | 445 | 445 | 163 | 672 | 397 | 1067 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest