Surf Forecasts:
Block Island surf forecast from 8 Sep 2026:
- Best quality surf: Friday 11 Sep, 2AM (local time) - 4.5ft (1.3m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 8AM (local time) - 8ft (2.5m), 7s period, SW swell with 740 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 2AM (local time) - 4.5ft (1.3m), 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 1.3m 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 2.5m 7s and forecast to arrive on Thursday (Sep 10) at 8AM. 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 Tuesday (Sep 15) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 11th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 2AM (Fri 11th Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 8AM (Thu 10th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Gather 'round, surfers. Rusty here. Let's be straight with you: the forecast for Block Island over the next 16 days is a real bummer. There's not a single session in the whole window that I'd recommend you paddle out for. The whole run is a dud.
We've got a long, quiet stretch ahead. The first few days are flat with a tiny 0.7 ft to 2 ft swell and messy winds. Around Thursday the 10th, the swell does jump up to 8 ft from the SW, but the wind is a fresh 22 mph cross-shore, making it a lumpy, choppy mess. The combined wave energy hits 619 (moderate) there, but it's blown out. That setup is more interesting for kite surfing than paddle surfing. After that, it's back to tiny, weak surf with energy readings mostly under 100. The best wind we see is a glassy period on Saturday afternoon the 12th, but with a swell of only 1 ft, there's nothing to ride.
There's a flicker of hope on the weekend of the 19th and 20th of September, with some clean offshore winds from the north, but the swell is still only 3 ft to 4 ft with a short period of 4 to 6 seconds. The energy is weak (73 to 104), and it's just not enough to get excited about. The whole 16-day outlook is a blank. In this area, a run of poor surf like this is pretty normal for the time of year. Forecasts can change, but right now, there's nothing to chase.
Stay patient. Rusty out.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu morning. Warm (max 24°C on Tue afternoon, min 19°C on Thu night). Winds increasing (calm on Wed morning, strong winds from the SW by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 23°C on Sun night, min 16°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 9 | SW 4 | SE 9 | E 9 | SW 4 | SW 7 | SW 8 | SW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 6 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 10 | 12 | 7 | 22 | 444 | 606 | 465 | 178 | 64 | 62 | 45 | 17 | 15 | 24 | 46 | 42 | 50 | 38 | 63 | 43 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross | cross | off | off | cross | cross-off | cross | glassy | cross-on | on | on | on | cross-on | cross-on | cross-off |
High Tide | 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 | 10:41AM1.01m | 10:54PM0.80m | ||||||||
Low Tide | 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 | 4:59PM0.09m | 4:21AM0.11m | |||||||
 | |  | |  |  |  | |  |  | |  | | | | | |  | | | | |
 | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — |
mm | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 22 | 24 | 24 | 22 | 23 | 22 | 22 | 23 | 23 | 19 | 22 | 22 | 17 | 20 | 21 | 21 | 22 | 23 | 24 | 24 | 25 |
Feels °C | 20 | 20 | 20 | 22 | 21 | 18 | 19 | 20 | 22 | 17 | 19 | 17 | 14 | 21 | 20 | 19 | 22 | 24 | 25 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | WSW 4 | SSE 9 | SE 9 | SSE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 6 | SSW 6 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 7 |
| kJ | 6 | 8 | 12 | 7 | 14 | 12 | 12 | 13 | 178 | 64 | 62 | 45 | 17 | 6 | 24 | 46 | 42 | 50 | 38 | 63 | 43 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 10 | ESE 9 | SE 9 | SE 10 | SSW 5 | SSW 5 | — | — | SE 9 | S 5 | SSW 5 |
| kJ | 6 | 6 | 6 | 6 | 2 | 1 | 1 | 1 | 14 | 14 | 14 | 8 | 14 | 15 | 3 | 3 | — | — | 22 | 27 | 16 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | S 6 | S 6 | SE 10 | — | — | — | — | E 8 | S 7 | ENE 3 | SE 7 | SSE 6 | — | S 10 | — | — | — | — | — | SE 15 |
| kJ | 8 | 1 | 1 | 4 | — | — | — | — | 1 | 1 | 1 | 2 | 4 | — | 2 | — | — | — | — | — | 8 |
Wind waves Height (m) Direction Period (s) | NNW 2 | SW 4 | SW 4 | SW 4 | SW 4 | SW 7 | SW 8 | SW 7 | — | NE 3 | — | — | NE 3 | SSE 6 | S 4 | SSE 3 | SSE 3 | S 3 | SSW 4 | SSW 5 | NNE 3 |
| kJ | 1 | 10 | 7 | 3 | 22 | 444 | 606 | 465 | — | 3 | — | — | 2 | 7 | 9 | 4 | 6 | 8 | 20 | 34 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 482 | 769 | 665 | 1095 | 1095 | 1084 | 204 | 209 | 0 | 24 | 24 | 642 | 776 | 769 | 249 | 415 | 1158 | 249 | 24 | 249 | 24 |
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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