Surf Forecasts:
Block Island surf forecast from 10 Sep 2026:
- Best quality surf: Thursday 10 Sep, 11PM (local time) - 4.5ft (1.3m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 5PM (local time) - 5ft (1.6m), 7s period, SW swell with 240 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 11PM (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 Thursday (Sep 10) at 11PM. 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 cross-offshore as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 1.6m 7s and forecast to arrive on Thursday (Sep 10) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Thursday (Sep 17) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 10th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 11PM (Thu 10th Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 5PM (Thu 10th Sep) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let's have a look at what's on the table for Block Island.
Right off the bat, I gotta be honest with you – this is one of those outlooks where we're looking at a long stretch of so-so conditions. The forecast is pretty flat for the first couple of weeks. We're looking at period after period marked as "poor surf conditions," with a zero score, so don't be in a rush to wax up your board just yet. The water's sitting right around 69° which is pretty normal for the time of year, so at least it won't be a shock to the system.
We've got a real gap in the action here. The first hint of something that might get your hopes up doesn't arrive until Thursday the 24th of September. That's a full two-week wait from the start of the forecast. It's a long, dry spell, and for an area like this, that's not totally out of the ordinary.
The standout, and really the only window to talk about, is that Thursday the 24th of September. The morning shows a clean 4 ft swell from the east, with a moderate wave energy (138). The wind is a fresh cross-offshore breeze out of the west, which should keep the faces pretty tidy. The period is a short 8 seconds, so it won't be a groundswell, but it's the best we've got. The afternoon cleans up even more with a fresh offshore wind from the northwest, holding that same 4 ft east swell, though the energy drops a little (105). This is a point break that rarely breaks, so if it's working, it's a special thing. But remember, it's a long-range call, so keep your fingers crossed. The crowd situation is something to be aware of – it's listed as "often" busy, so if you get that window, you'll have company.
Before that, on Sunday the 13th, there's a tiny moment worth a mention. The afternoon shape is glassy with a 3 ft SSW swell, but it's gutless, with only 86 energy and a short period. It's a possibility for a longboard, but don't expect much push.
For the rest of the run, it's a story of cross-shore winds, small chop, and tiny swells. The 24th is the only real shot in the locker.
Stay patient, boys and girls.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 25°C on Thu afternoon, min 18°C on Sat morning). Winds decreasing (fresh winds from the WSW on Thu morning, light winds from the ESE by Sat morning). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sun morning. Warm (max 23°C on Sun night, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | SW 7 | SW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 7 | SE 9 | SE 10 | SE 10 | SSE 5 | SSE 6 | SSE 6 | SE 9 | SE 9 | E 5 | E 5 | ESE 9 | ESE 9 | SW 4 | SW 4 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 400 | 240 | 110 | 44 | 40 | 40 | 15 | 15 | 24 | 51 | 53 | 34 | 27 | 19 | 40 | 25 | 8 | 8 | 22 | 40 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | off | off | cross | cross-off | cross-on | on | cross-on | cross-on | glassy | cross | cross-off | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 12:09PM0.88m | 00:20AM0.66m | ||||||||
Low Tide | 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 | 6:44PM0.22m | ||||||||
 |  |  | | |  | | |  |  | | | | | | | | | | |  | |
 | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:55 | — | — | 6:53 | — |
mm | — | — | — | — | — | — | — | — | 2 | 8 | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 22 | 25 | 25 | 22 | 24 | 24 | 20 | 22 | 23 | 20 | 21 | 23 | 23 | 20 | 20 | 18 | 19 | 20 | 21 | 22 | 22 |
Feels °C | 18 | 22 | 24 | 19 | 21 | 21 | 20 | 21 | 21 | 19 | 24 | 25 | 24 | 18 | 18 | 15 | 16 | 16 | 19 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SSW 7 | SSW 6 | SE 9 | SSW 7 | SSW 6 | SW 6 | SE 10 | SE 10 | SSE 6 | SSE 6 | SE 6 | SE 6 | S 6 | SE 9 | ESE 9 | E 6 | SE 9 | E 7 | ESE 9 |
| kJ | 13 | 13 | 110 | 44 | 13 | 40 | 15 | 8 | 24 | 33 | 53 | 34 | 16 | 17 | 12 | 12 | 8 | 6 | 13 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | SE 10 | SE 10 | — | SE 9 | SSE 6 | SE 10 | S 9 | — | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSW 6 | E 5 | ESE 9 | E 7 | ESE 9 | E 6 |
| kJ | 1 | 1 | 14 | 14 | — | 14 | 4 | 15 | 2 | — | 30 | 29 | 27 | 19 | 19 | 7 | 2 | 8 | 4 | 8 | 2 |
Swell 3 Height (m) Direction Period (s) | — | E 8 | — | SE 7 | SE 7 | SSE 6 | SE 9 | SSE 6 | — | — | ENE 4 | E 4 | SSW 3 | SW 4 | S 15 | SE 15 | SSW 6 | SE 14 | — | SE 13 | SE 13 |
| kJ | — | 1 | — | 2 | 2 | 4 | 14 | 4 | — | — | 3 | 3 | 1 | 1 | 4 | 8 | 3 | 7 | — | 7 | 7 |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | — | — | SSW 6 | — | — | — | S 4 | SSE 5 | — | — | N 3 | ENE 4 | E 5 | E 5 | ESE 4 | S 3 | SW 4 | SW 4 | SW 5 |
| kJ | 400 | 240 | — | — | 40 | — | — | — | 13 | 51 | — | — | 2 | 12 | 40 | 25 | 7 | 4 | 22 | 40 | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 29 | 24 | 29 | 163 | 49 | 1156 | 743 | 335 | 178 | 24 | 24 | 85 | 152 | 645 | 1493 | 2633 | 1239 | 237 | 2551 | 198 |
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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