Surf Forecasts:
Block Island surf forecast from 4 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 10ft (3.0m), 7s period, SW swell with 830 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 3.0m 7s and forecast to arrive on Thursday (Sep 10) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Friday (Sep 11) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Thu 10th Sep) | 10ft (3.0m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. We’ve got a 16-day look at Block Island, and I gotta be honest with you – it’s a tough one. The surf is flat as a pancake for the first few days, and while there’s a bit of a pulse later, the quality just isn’t there for paddle surfing. The reports are all saying "poor surf conditions," so we’re scraping the bottom of the barrel for anything rideable.
The first real hope we see is a building swell around Wednesday, September 10th. The morning brings a 8ft swell from the SW with a short period of 8 seconds, and the combined energy is up at 619 (moderate). The wind is a cross-off from the WNW at 22 mph, which means it’ll be clean. But listen, with that size and short period, it’s going to be a lumpy, powerful mess – definitely a day for the experts only. The afternoon drops to 6ft with a cleaner look, but it’s still a big, raw ocean. This is the only real standout, but it’s not a pretty one.
After that, we settle back into small, weak, and inconsistent waves. The period stays short, and the wind shifts around, mostly cross or cross-on. There’s a moment on Sunday, September 13th where the morning goes glassy with a light SSW breeze, but the swell is a tiny 2ft from the ESE. It’s surfable if you’re desperate for a longboard, but you’ll be waiting for the rare set.
The rest of the forecast is a washout. The swell direction is not ideal for the Block Island point, which loves a SE. The water temp is about 69°F, which is pretty normal for this time of year, so no need to worry about a wetsuit just yet. The break is known to "rarely break" and it’s "often" crowded, which makes sense – when it’s good, everyone’s on it. But with this outlook, you won’t have to worry about a crowd.
To be blunt, if you’re looking for a surf trip, this isn’t it. The setup looks far more interesting for kite surfing, especially on the 10th when the wind is strong and the swell is beefy. For a paddle surfer, it’s a long wait for very little reward.
Stay patient, the forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 17°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 24°C on Mon night, min 20°C on Tue morning). Winds increasing (light winds from the WSW on Mon afternoon, near gales from the SW by Wed night). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 8 | SE 8 | SSW 6 | SE 8 | ENE 5 | E 7 | E 9 | E 10 | E 10 | E 9 | E 10 | E 9 | E 9 | SW 4 | SW 5 | SW 6 | SW 7 | SW 8 | SSW 8 | SSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 17 | 16 | 13 | 9 | 29 | 25 | 15 | 30 | 28 | 27 | 16 | 7 | 7 | 9 | 50 | 165 | 708 | 605 | 337 | 117 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross | cross-off | cross-off | cross | off | off | cross | off | cross-off | cross | cross-off | cross | cross-on | cross | cross-off | cross-off | off |
High Tide | 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 | 7:46AM1.04m | 8:07PM1.01m | ||||||||
Low Tide | 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 | 2:00PM-0.03m | 2:25AM-0.03m | |||||||
 |  | |  |  | | | | | |  | | | |  | |  | | | | |
 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — |
 | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 28 | 26 | 21 | 21 | 19 | 18 | 19 | 20 | 20 | 23 | 24 | 22 | 24 | 24 | 23 | 22 | 23 | 23 | 23 | 20 |
Feels °C | 25 | 23 | 19 | 19 | 15 | 14 | 19 | 15 | 17 | 21 | 20 | 20 | 19 | 19 | 24 | 19 | 17 | 20 | 18 | 14 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | SE 8 | SSW 6 | SSW 5 | SSW 6 | E 7 | ENE 6 | E 10 | E 10 | E 9 | E 10 | E 9 | E 9 | SSE 9 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 |
| kJ | 15 | 16 | 13 | 6 | 3 | 25 | 14 | 30 | 28 | 27 | 16 | 7 | 7 | 7 | 3 | 15 | 13 | 14 | 14 | 117 |
Swell 2 Height (m) Direction Period (s) | SE 8 | E 6 | E 6 | E 7 | SE 9 | SSW 6 | E 9 | SSW 6 | SSW 6 | SSW 6 | SE 8 | SE 9 | SE 9 | E 9 | E 9 | E 9 | E 8 | — | — | SE 10 |
| kJ | 17 | 7 | 7 | 8 | 12 | 8 | 15 | 3 | 3 | 4 | 3 | 3 | 3 | 6 | 2 | 2 | 1 | — | — | 15 |
Swell 3 Height (m) Direction Period (s) | S 8 | SW 4 | SE 8 | SE 8 | SE 9 | SE 9 | SSW 6 | SE 9 | SE 9 | SE 8 | SE 8 | S 6 | — | SE 10 | SE 10 | — | — | — | — | — |
| kJ | 1 | 3 | 9 | 9 | 12 | 3 | 7 | 3 | 3 | 3 | 3 | 1 | — | 4 | 4 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | NNW 4 | NNE 3 | ENE 5 | ENE 5 | NE 4 | — | N 3 | NW 3 | W 3 | SW 4 | WSW 4 | SW 3 | SW 4 | SW 5 | SW 6 | SW 7 | SW 8 | SSW 8 | N 4 |
| kJ | 17 | 8 | 3 | 19 | 29 | 15 | — | 4 | 5 | 5 | 8 | 5 | 5 | 9 | 50 | 165 | 708 | 605 | 337 | 27 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 85 | 249 | 634 | 157 | 207 | 59 | 82 | 85 | 49 | 49 | 767 | 642 | 769 | 615 | 608 | 709 | 1148 | 40 | 34 | 26 |
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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