
Surf Forecasts:
Block Island surf forecast from 6 Sep 2026:
- Best quality surf: Thursday 10 Sep, 11PM (local time) - 5ft (1.5m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 7.5ft (2.3m), 7s period, SW swell with 498 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 11PM (local time) - 5ft (1.5m), 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 Thursday (Sep 10) at 11PM. The primary swell is predicted to be 1.5m and 7s 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 2.3m 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 0.9m 4s period and expected on Sunday (Sep 06) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 10th Sep) | 5ft (1.5m) 7s |
| Best Surf | 11PM (Thu 10th Sep) | 5ft (1.5m) 7s |
| Most Powerful | 5AM (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, Rusty here. Let's take a look at what's coming up for the Block Island area.
First off, I gotta be straight with you – the next week and a half is looking pretty grim. The waves are just not cooperating. We’ve got a long stretch of small, weak, and messy conditions. The best description I can give you is "poor surf conditions" from this Sunday right through to the middle of the following week. The swell is tiny, mostly under 3ft, and the wind is all over the place, often cross-shore or cross-onshore, so it's going to be lumpy and choppy. The combined swell energy is laughable, barely cracking 100 (26 to 94) for most of that period. You’ll be doing more sitting than paddling.
There is a little moment of hope. On the morning of Monday the 15th of September, we get a little glassy window with some light wind from the SSW, and a tiny 3ft swell from the ENE. It’s still small, and the energy is weak (72), but with the glassy conditions, it might be the closest thing to a clean, cruisy session for a couple of weeks. Don't expect much.
Then things get weird. The real action, if you can call it that, is way out in the second week. On Thursday the 18th of September, the swell machine finally wakes up. We’re looking at some serious size rolling in from the east, with swell heights jumping to 8ft by Thursday morning, and then solid 10ft to 12ft by Friday the 19th. The combined swell energy is massive, hitting 532 on Thursday morning and then a whopping 1695 on Friday morning. This is a lot of water moving around.
But here’s the catch. Block Island is a point break, and it's rarely breaking. This kind of long-period, east-southeast groundswell might be too straight for it to set up properly, especially with the wind. The forecast for those days shows strong cross-shore and cross-onshore winds, which will chop it up into a mess. The guidance calls it "marginal" at best, and honestly, for a point break, this looks more like a wild, washing-machine session than a lined-up wave. These waves are big enough for experts only, over 8ft, but the quality is going to be poor. The Thursday morning (18th of September) might be the best of a bad bunch with the wind a little lighter, but it's still a gamble.
Overall, for paddle surfing, there's nothing to get excited about until the second week, and even then, it's a big, windy, and likely frustrating mess. If you're into kite surfing, the 18th and 19th of September with that strong east wind and big swell could be your ticket, but for a standard surfer, your best bet is to wait for the next forecast.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun morning. Warm (max 24°C on Mon night, min 15°C on Sun morning). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm (max 25°C on Fri afternoon, min 20°C on Thu 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 | ||||||||||||||
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) | ENE 5 | E 8 | ENE 7 | E 10 | E 10 | E 9 | E 9 | SE 9 | WSW 4 | SE 9 | SW 4 | SW 5 | SW 6 | SW 7 | SW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 |
Wave Graph | |||||||||||||||||||
28 | 20 | 66 | 29 | 30 | 16 | 15 | 12 | 18 | 12 | 6 | 54 | 402 | 444 | 383 | 163 | 57 | 35 | 29 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | glassy | off | off | cross-on | off | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | cross-off |
High Tide | 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 | 8:32AM1.08m | 8:50PM0.98m | |||||||
Low Tide | 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 | 2:47PM-0.03m | 2:59AM-0.02m | ||||||
— | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | |
7:13 | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | |
mm | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 19 | 16 | 18 | 19 | 21 | 23 | 24 | 21 | 24 | 24 | 22 | 22 | 22 | 23 | 23 | 20 | 22 | 25 | 26 |
Feels °C | 15 | 11 | 18 | 17 | 16 | 21 | 21 | 19 | 21 | 21 | 23 | 19 | 18 | 19 | 22 | 19 | 23 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | E 8 | ENE 5 | E 10 | E 10 | E 9 | E 9 | SW 4 | SSE 9 | SW 4 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 6 | SSW 6 | SE 6 |
3 | 20 | 8 | 29 | 30 | 16 | 15 | 6 | 8 | 9 | 3 | 15 | 13 | 13 | 13 | 163 | 57 | 35 | 9 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | SSW 6 | E 7 | SE 9 | SE 9 | SE 8 | SW 4 | SE 9 | E 9 | SE 9 | SE 10 | E 9 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 9 | SE 9 |
12 | 3 | 17 | 13 | 12 | 11 | 2 | 12 | 6 | 12 | 4 | 2 | 1 | 1 | 1 | 15 | 14 | 14 | 13 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SSW 6 | SSW 5 | S 5 | S 5 | SSE 8 | E 9 | — | E 9 | E 9 | — | — | — | — | E 8 | — | SE 9 | SE 11 |
12 | 3 | 3 | 3 | 2 | 2 | 7 | 6 | — | 2 | 2 | — | — | — | — | 1 | — | 14 | 5 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 5 | ENE 7 | W 3 | NW 3 | W 3 | NW 3 | NW 3 | WSW 4 | W 3 | SW 4 | SW 5 | SW 6 | SW 7 | SW 7 | — | — | — | SSW 6 |
28 | 33 | 66 | 4 | 5 | 1 | 2 | 2 | 18 | 4 | 6 | 54 | 402 | 444 | 383 | — | — | — | 29 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2371 | 157 | 85 | 85 | 85 | 49 | 426 | 426 | 1095 | 608 | 992 | 1067 | 1577 | 966 | 24 | 0 | 24 | 221 | 29 |
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.










