Surf Forecasts:
Block Island surf forecast from 2 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 2.5ft (0.8m), 11s period, E swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 11PM (local time) - 5.5ft (1.7m), 6s period, SW swell with 210 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 2.5ft (0.8m), 11s period with E 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 Monday (Sep 07) at 2AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.1m and 9s. 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 1.7m 6s and forecast to arrive on Tuesday (Sep 08) 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 1.3m 6s period and expected on Saturday (Sep 05) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 2.5ft (0.8m) 11s |
| Best Surf | 2AM (Mon 7th Sep) | 2.5ft (0.8m) 11s |
| Most Powerful | 11PM (Tue 8th Sep) | 5.5ft (1.7m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Gotta be straight with you—this is a tough one for Block Island. We’re looking at a long stretch of nothing good, I’m talking a full 15 days of straight-up poor surf conditions. That’s a massive gap from Wednesday the 4th all the way until Thursday the 17th. The wind is mostly all over the shop, and the swell is just not cooperating. It’s frustrating, but it happens, and forecasts can change, so don’t lose all hope just yet.
The only real glimmer of light comes on the very last day of the outlook, Thursday the 17th of September. We could see a bit of a pulse of swell, with the combined energy (221) feeling moderate. A clean 6 ft swell from the east, with a period of 6 seconds, is on the table. It’s a short period, but it’s something. The wind is light and cross-off, meaning the face should be pretty clean. This is the only time the wave comment even says "expect good surf conditions," so that’s where I’d put my energy. Just keep in mind, this is a long-range call, so it’s promising but not a sure thing.
-Rusty
Short Range ForecastModerate rain (total 16mm), heaviest on Thu morning. Warm (max 25°C on Fri afternoon, min 19°C on Tue night). Winds decreasing (fresh winds from the ESE on Tue night, light winds from the W by Thu night). | Days 5-7 Weather SummarySome drizzle, heaviest during Sat afternoon. Warm (max 24°C on Fri night, min 15°C on Sun morning). Winds decreasing (fresh winds from the NNW on Fri night, light winds from the NNE by Mon morning). | ||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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) | SE 12 | SE 11 | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 8 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | E 9 | E 11 | E 11 | E 11 | E 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 79 | 94 | 79 | 92 | 93 | 60 | 38 | 23 | 30 | 32 | 15 | 12 | 18 | 8 | 38 | 149 | 108 | 110 | 73 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross-on | off | cross-off | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross-on | off | cross-off | cross-on | cross |
High Tide | 11:30PM0.83m | 11:52AM0.99m | 00:21AM0.77m | 12:48PM0.97m | 1:21AM0.73m | 1:55PM0.95m | 2:32AM0.71m | 3:13PM0.94m | 3:50AM0.73m | 4:30PM0.96m | 5:02AM0.80m | 5:35PM0.99m | |||||||
Low Tide | 5:08AM0.05m | 6:26PM0.13m | 5:56AM0.08m | 7:52PM0.16m | 6:55AM0.10m | 9:21PM0.17m | 8:08AM0.12m | 10:31PM0.14m | 9:43AM0.11m | 11:29PM0.10m | 11:08AM0.07m | 00:20AM0.05m | |||||||
 |  | | |  | |  |  | |  | |  | | | | | | | | |
 | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 7:19 | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — |
mm | 3 | — | — | 2 | 11 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 20 | 23 | 23 | 23 | 24 | 23 | 25 | 24 | 21 | 22 | 18 | 18 | 20 | 20 | 19 | 20 | 21 |
Feels °C | 16 | 17 | 17 | 24 | 23 | 23 | 27 | 23 | 23 | 24 | 18 | 20 | 13 | 11 | 17 | 17 | 17 | 15 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SE 11 | SE 10 | SE 9 | SSE 6 | SE 6 | SE 6 | SSW 5 | SE 8 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | E 9 | E 11 | E 11 | E 11 | E 10 |
| kJ | 71 | 94 | 79 | 53 | 93 | 60 | 38 | 15 | 17 | 32 | 15 | 12 | 18 | 8 | 38 | 149 | 108 | 110 | 73 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 4 | — | SE 9 | SE 9 | SW 5 | SE 8 | E 7 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SSW 6 | SE 9 | WSW 4 | SE 8 | SE 8 |
| kJ | — | — | 1 | — | 28 | 27 | 13 | 23 | 8 | 10 | 10 | 10 | 3 | 3 | 4 | 3 | 5 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SE 8 | SE 6 | SSE 6 | E 7 | E 7 | — | — | — | SE 10 | SW 6 | SE 9 | S 5 | — |
| kJ | — | — | — | — | — | — | 18 | 9 | 3 | 8 | 4 | — | — | — | 4 | 1 | 3 | 1 | — |
Wind waves Height (m) Direction Period (s) | SE 5 | ESE 5 | SE 6 | SE 6 | SW 5 | SW 4 | W 4 | — | SSW 6 | NNW 4 | NNE 4 | NE 6 | ENE 6 | ENE 5 | ENE 5 | WSW 2 | — | SW 4 | SW 4 |
| kJ | 79 | 78 | 69 | 92 | 1 | 16 | 6 | — | 30 | 16 | 42 | 88 | 65 | 51 | 55 | 1 | — | 2 | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 156 | 373 | 374 | 24 | 26 | 24 | 24 | 49 | 117 | 249 | 634 | 767 | 144 | 157 | 130 | 0 | 24 | 115 | 26 |
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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