Surf Forecasts:
Block Island surf forecast from 9 Sep 2026:
- Best quality surf: Thursday 10 Sep, 8PM (local time) - 4.5ft (1.4m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 8AM (local time) - 7.5ft (2.3m), 7s period, SW swell with 554 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 8PM (local time) - 4.5ft (1.4m), 7s period with SW 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 Thursday (Sep 10) at 8PM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.3m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 2.3m 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 0.4m 3s period and expected on Friday (Sep 11) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 10th Sep) | 4.5ft (1.4m) 7s |
| Best Surf | 8PM (Thu 10th Sep) | 4.5ft (1.4m) 7s |
| Most Powerful | 8AM (Thu 10th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, it's Rusty here, and I gotta be straight with you – this 16-day stretch for Block Island is a tough one to call. We’ve got a blank run of surf ahead, and the models are showing nada for any real quality. Let’s break it down.
The picture is pretty grim from now through the end of the window. We start off with a weak little pulse on Wednesday the 9th – just 3ft of messy, 4-second windswell from the SSW and a cross-on wind at 19 mph. The combined energy is a paltry 40, so that’s barely a ripple. It’s big on the “poor surf conditions” front, so don’t bother paddling out.
Thursday the 10th sees a spike in swell height to 7ft from the SW, with moderate wave energy (454), but it’s got a 7-second period and cross-shore wind making it lumpy. That’s a no-go. Friday the 11th cleans up a bit with a NNW offshore wind, but the swell drops back to 3ft with only 60 energy – still not enough to light up the point. Saturday the 12th goes glassy with only 1ft and 32 energy; you could take a longboard out for a paddle, but don’t expect a wave.
The rest of the forecast just looks like more of the same. We get pockets of clean wind and offshore conditions, but the swell is tiny – often under 2ft and with very low energy (in the 20s and 30s). Even the bigger day on September 24th (Thursday) shows a 5ft swell from the ESE, but it’s cross-shore wind and the period is a short 8 seconds. The energy hits 366, which is moderate, but the conditions are described as “poor”. For Block Island, a point that rarely breaks and is often crowded, you need the stars to align. They just aren’t here.
There’s honestly no standout in this entire run. The swell is either too small, too short period, or plagued by side-shore wind. It’s a rare stretch of nothing. For a spot that’s already inconsistent, this is a normal blank run.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 25°C on Thu afternoon, min 18°C on Sat morning). Winds decreasing (strong winds from the SW on Wed night, calm by Sat morning). | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Sun morning. Warm (max 25°C on Mon afternoon, min 18°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | SSW 4 | SW 6 | SW 7 | SW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 7 | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SSE 5 | SSE 6 | S 6 | SE 9 | SE 7 | SE 7 | S 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 24 | 390 | 440 | 301 | 113 | 45 | 30 | 40 | 14 | 15 | 24 | 33 | 30 | 39 | 48 | 34 | 19 | 10 | 9 | 28 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | off | off | cross-off | cross-off | glassy | cross-on | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | on | cross-on | cross-on |
High Tide | 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 | 11:24AM0.95m | 11:35PM0.73m | |||||||
Low Tide | 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 | 5:46PM0.16m | 4:52AM0.16m | |||||||
 |  |  |  |  | | |  | | | |  |  | | | | | | | | |
 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:55 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | 30 | 8 | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 22 | 25 | 25 | 21 | 24 | 24 | 19 | 22 | 23 | 20 | 24 | 24 | 23 | 25 | 24 | 21 | 22 | 23 |
Feels °C | 20 | 19 | 19 | 23 | 24 | 17 | 20 | 21 | 18 | 21 | 21 | 18 | 26 | 26 | 19 | 21 | 20 | 20 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SSW 6 | SE 10 | SE 10 | SE 9 | SSE 5 | SSE 6 | S 6 | SSE 6 | SE 7 | SE 7 | ESE 7 |
| kJ | 14 | 12 | 13 | 13 | 113 | 45 | 30 | 40 | 14 | 6 | 24 | 33 | 30 | 39 | 48 | 34 | 10 | 8 | 7 | 4 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 8 | E 8 | SE 7 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | S 9 | — | — | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 |
| kJ | 2 | 1 | 1 | 2 | 15 | 14 | 13 | 14 | 14 | 15 | 2 | — | — | 29 | 28 | 27 | 19 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 7 | — | SSE 6 | SSE 6 | SSE 6 | — | — | — | — | — | — | SE 15 | SE 15 | SE 15 | SE 14 |
| kJ | — | — | — | — | — | 1 | — | 4 | 4 | 4 | — | — | — | — | — | — | 8 | 8 | 8 | 7 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SW 6 | SW 7 | SW 7 | — | NNW 3 | W 2 | NNW 3 | — | — | S 5 | S 5 | SSE 5 | — | — | — | ESE 3 | SSE 5 | SSE 3 | S 4 |
| kJ | 24 | 390 | 440 | 301 | — | 3 | 1 | 1 | — | — | 14 | 20 | 24 | — | — | — | 3 | 10 | 9 | 28 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1095 | 966 | 26 | 26 | 24 | 49 | 1524 | 49 | 1156 | 634 | 249 | 219 | 24 | 24 | 26 | 29 | 847 | 415 | 1157 | 249 |
Best forecast wave conditions in Rhode Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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.
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