Surf Forecasts:
Block Island surf forecast from 7 Sep 2026:
- Best quality surf: Friday 11 Sep, 2AM (local time) - 4.5ft (1.4m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 11AM (local time) - 8ft (2.4m), 7s period, SW swell with 606 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 2AM (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 (Sep 11) at 2AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.3m and 10s. 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 2.4m 7s and forecast to arrive on Thursday (Sep 10) 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 0.6m 4s period and expected on Tuesday (Sep 08) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 11th Sep) | 4.5ft (1.4m) 7s |
| Best Surf | 2AM (Fri 11th Sep) | 4.5ft (1.4m) 7s |
| Most Powerful | 11AM (Thu 10th Sep) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let me tell ya, it’s Rusty here, and I’ve gotta be straight with you – this outlook for Block Island is a tough one. We’re looking at a long, long stretch ahead with pretty much nothing worth paddling out for. There’s a gap right from the start of the forecast that runs almost the entire 16-day window.
From Monday the 7th right through to the end of the period, it’s a complete write-off. Day after day of tiny, weak swell or messy, blown-out junk. We’re talking minimal wave energy, often down in the teens and twenties, with periods barely cracking 10 seconds. A couple of afternoons around Thursday the 10th of September show a bit more push – around 8ft and 6ft from the SW – but with fresh cross-shore winds turning it into a lumpy, choppy mess, it’s just not surfable. The combined energy gets up to 619 and 401, which sounds meaty, but the wind ruins it. That setup looks more interesting for kite surfing than paddle surfing, to be honest.
The water temperature is sitting around 70°, which is pretty normal for this time of year, no real anomaly to speak of. But that’s small comfort when there’s no rideable surf.
Even the rare chances on the 11th and 15th of September with offshore wind only manage a tiny 3ft from the SSW, with weak energy. And remember, Block Island is a point break that rarely breaks, so it needs everything to line up, and it just doesn’t. It’s a classic case of the area going blank for a stretch – not unusual, but still a bummer. The first week is the worst of it, with the second week only offering slightly less wind but equally small, weak surf.
Stick to the longboard for a flat-water paddle if you have to get wet, but for waves, this is a no-go. Forecasts can change, but right now, I wouldn’t hold my breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 18°C on Mon morning). Winds increasing (calm on Wed morning, strong winds from the SW by Wed night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu night, min 16°C on Sat morning). Winds decreasing (fresh winds from the WSW on Thu morning, calm by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | E 10 | E 9 | E 9 | E 9 | SSE 9 | SE 9 | SSE 8 | SW 4 | SW 6 | SW 7 | SW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 15 | 15 | 8 | 8 | 12 | 7 | 24 | 341 | 606 | 386 | 191 | 88 | 64 | 30 | 14 | 14 | 15 | 46 | 31 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | off | off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 5:35PM0.99m | 6:03AM0.88m | 6:31PM1.01m | 6:57AM0.97m | 7:21PM1.02m | 7:46AM1.04m | 8:07PM1.01m | 8:32AM1.08m | 8:50PM0.98m | 9:16AM1.09m | 9:33PM0.93m | 9:59AM1.06m | 10:14PM0.87m | ||||||||
Low Tide | 11:08AM0.07m | 00:20AM0.05m | 12:13PM0.02m | 1:06AM0.01m | 1:09PM-0.02m | 1:47AM-0.02m | 2:00PM-0.03m | 2:25AM-0.03m | 2:47PM-0.03m | 2:59AM-0.02m | 3:32PM-0.01m | 3:29AM0.02m | 4:16PM0.04m | 3:55AM0.06m | |||||||
 | |  |  | |  | | |  |  | | | | | | | | | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 24 | 24 | 22 | 24 | 24 | 22 | 22 | 23 | 23 | 22 | 24 | 18 | 22 | 22 | 18 | 20 | 21 | 21 | 21 | 22 |
Feels °C | 17 | 22 | 21 | 20 | 21 | 22 | 23 | 20 | 17 | 20 | 19 | 23 | 13 | 17 | 17 | 16 | 20 | 20 | 20 | 18 | 20 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | SW 4 | SSE 9 | SE 9 | SSE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SW 6 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 |
| kJ | 30 | 15 | 15 | 3 | 8 | 12 | 7 | 15 | 12 | 12 | 13 | 191 | 88 | 64 | 30 | 9 | 14 | 15 | 46 | 31 | 29 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 8 | WSW 4 | E 9 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 6 | SSW 5 | SSW 5 | — | SSE 5 | — |
| kJ | 7 | 7 | 1 | 6 | 6 | 6 | 2 | 2 | 1 | 1 | 1 | 15 | 14 | 14 | 14 | 7 | 3 | 2 | — | 3 | — |
Swell 3 Height (m) Direction Period (s) | S 5 | S 5 | SSE 8 | SSE 9 | — | S 6 | SE 10 | — | — | — | E 8 | E 8 | — | — | SE 11 | SE 9 | SSE 6 | SW 5 | SW 5 | — | — |
| kJ | 2 | 1 | 7 | 8 | — | 1 | 4 | — | — | — | 1 | 1 | — | — | 5 | 14 | 3 | 1 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | NW 3 | W 3 | NW 3 | — | WSW 3 | SW 4 | SSW 3 | SW 4 | SW 6 | SW 7 | SW 7 | — | NNW 4 | W 3 | NNW 3 | NNE 3 | — | SSE 6 | — | — | S 3 |
| kJ | 5 | 3 | 2 | — | 7 | 7 | 3 | 24 | 341 | 606 | 386 | — | 8 | 1 | 3 | 2 | — | 7 | — | — | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 133 | 426 | 482 | 769 | 665 | 844 | 1067 | 1084 | 204 | 24 | 0 | 24 | 24 | 642 | 769 | 769 | 249 | 844 | 195 | 221 |
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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