
Surf Forecasts:
Block Island surf forecast from 6 Sep 2026:
- Best quality surf: Friday 11 Sep, 5AM (local time) - 7ft (2.1m), 8s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 11PM (local time) - 8ft (2.4m), 8s period, SSW swell with 628 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 5AM (local time) - 7ft (2.1m), 8s 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 5AM. The primary swell is predicted to be 2.1m and 8s period with a secondary swell of 0.3m and 10s. 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 2.4m 8s and forecast to arrive on Thursday (Sep 10) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Sep 07) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 11th Sep) | 7ft (2.1m) 8s |
| Best Surf | 5AM (Fri 11th Sep) | 7ft (2.1m) 8s |
| Most Powerful | 11PM (Thu 10th Sep) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, my friends, Rusty here with the straight talk on Block Island. I'm looking at the next couple of weeks, and honestly, it's a long, flat, woeful stretch before we see anything that's even remotely rideable.
We're starting on the 6th of September and it's a complete no-go. We're talking tiny swell, bad wind directions, and a whole lot of nothing. Swell heights are barely a foot or so, and the periods are short and weak. The wave energy is pathetic. Even when the wind goes glassy on Sunday afternoon, there's no swell to work with. This flat patch just keeps rolling on, day after day, with the wind shifting onshore and the swell staying microscopic. The energy readings are all in the dirt. The first week is a complete write-off.
Things get a bit of a pulse, but not in a good way, around Thursday the 10th of September. The swell jumps up to around 7ft, but it's onshore and messy. The wave energy kicks up to a moderate 454 and then a strong 595, but that wind is going to chop it to pieces. At that size, 7ft, with a period of just 7 seconds, it's going to be a bumpy, ugly mess that's only for the truly grommets. The *Block Island* point, which almost never breaks anyway, isn't going to save us.
Now, here's the one and only ray of sunshine. On Friday the 11th of September, things actually look promising. We've got a solid 5ft swell from the SSW, and the wind is blowing clean offshore from the NNE. The wave energy is a solid 285, and the period is a manageable 8 seconds. The forecast is actually calling for "good surf conditions" and a "clean" wave state. This is the standout of the entire forecast window. The *Block Island* point will finally have some proper lines, with that offshore wind grooming the faces. The water temperature is around 70°F, which is normal for this time of year. It's not perfect, but it's the only real session we've got. By the afternoon the wind shifts and the swell drops, so the morning is your window.
After that, we're back into the deep freeze. From Saturday the 12th all the way to Monday the 21st of September, it's a long, solid run of poor conditions. The swell is tiny, the wind is junk, and the energy barely registers. It's flat, hopeless, and a total bust. There's a tiny blip on Thursday the 17th with a 4ft swell and some cross-off wind, but the period is a weak 5 seconds and the wave energy is only 73. That's not surfable.
The bottom line is this: the entire 16-day forecast is a one-hit wonder. Your only real chance to get wet is the morning of Friday the 11th of September. Make the call, because it's going to be a long, dry spell after that.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun morning. Warm (max 25°C on Tue afternoon, min 16°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 24°C on Thu night, min 20°C on Fri night). Winds increasing (calm on Wed morning, strong winds from the SW by Wed night). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 8 | E 7 | ENE 8 | E 10 | E 9 | E 9 | SSE 9 | WSW 4 | WSW 4 | SW 4 | SW 4 | SW 6 | SW 7 | SW 7 | SSW 8 | SSW 8 | SSW 7 | S 6 | SE 5 | E 6 | E 6 |
Wave Graph | |||||||||||||||||||||
20 | 28 | 24 | 30 | 15 | 15 | 7 | 12 | 10 | 6 | 32 | 301 | 440 | 582 | 557 | 270 | 144 | 66 | 30 | 121 | 71 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-off | off | cross-off | off | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-on | on | on |
High Tide | 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 | 8:32AM1.08m | 8:50PM0.98m | 9:16AM1.09m | 9:33PM0.93m | ||||||||
Low Tide | 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 | 2:47PM-0.03m | 2:59AM-0.02m | 3:32PM-0.01m | 3:29AM0.02m | |||||||
6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | |
— | 7:10 | — | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — |
Temp °C | 17 | 18 | 19 | 20 | 24 | 24 | 22 | 25 | 25 | 22 | 22 | 22 | 23 | 23 | 24 | 21 | 23 | 24 | 20 | 20 | 20 |
Feels °C | 15 | 18 | 17 | 16 | 21 | 20 | 20 | 21 | 21 | 22 | 20 | 19 | 18 | 20 | 23 | 21 | 24 | 22 | 20 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 7 | ENE 8 | E 10 | E 9 | E 9 | SW 4 | SSE 9 | SSE 9 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | SSW 8 | SSW 7 | S 6 | SE 5 | ESE 10 | E 6 |
20 | 28 | 24 | 30 | 15 | 15 | 3 | 8 | 7 | 3 | 15 | 13 | 13 | 13 | 15 | 270 | 144 | 66 | 30 | 9 | 71 | |
Swell 2 Height (m) Direction Period (s) | SSW 6 | SSW 6 | SE 9 | SSE 9 | SSE 8 | SW 3 | SSE 9 | E 9 | E 9 | SE 10 | E 9 | E 8 | E 8 | — | — | SE 10 | SE 9 | SE 9 | SW 6 | SSW 5 | SE 10 |
3 | 3 | 13 | 7 | 7 | 2 | 7 | 6 | 6 | 4 | 2 | 1 | 1 | — | — | 15 | 14 | 13 | 8 | 3 | 15 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SSE 10 | ESE 10 | S 5 | S 5 | SSE 8 | E 9 | S 6 | S 6 | E 9 | — | — | — | — | — | — | SE 9 | SE 11 | SE 9 | — | S 5 |
3 | 9 | 10 | 2 | 2 | 7 | 6 | 1 | 1 | 2 | — | — | — | — | — | — | 14 | 5 | 14 | — | 2 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | — | W 2 | NW 3 | W 3 | NW 2 | — | WSW 4 | WSW 4 | SW 4 | SW 4 | SW 6 | SW 7 | SW 7 | SSW 8 | NW 3 | — | SE 6 | E 5 | E 6 | — |
11 | — | 1 | 3 | 1 | 1 | — | 12 | 10 | 6 | 32 | 301 | 440 | 582 | 557 | 2 | — | 23 | 21 | 121 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 85 | 130 | 131 | 49 | 131 | 426 | 482 | 1084 | 608 | 608 | 2500 | 1156 | 204 | 211 | 24 | 0 | 0 | 24 | 85 | 1032 | 26 |
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)
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.










