Surf Forecasts:
Block Island surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 4.5ft (1.3m), 7s period, ENE swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 2AM (local time) - 6ft (1.8m), 6s period, SW swell with 273 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 11PM (local time) - 4.5ft (1.3m), 7s period with ENE 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 Sunday (Sep 06) at 11PM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.9m and 5s. Another secondary swell of 0.4m and 9s is also forecast. 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 1.8m 6s and forecast to arrive on Thursday (Sep 10) at 2AM. 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 5s period and expected on Saturday (Sep 05) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 6th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 11PM (Sun 6th Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 2AM (Thu 10th Sep) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, Rusty here. Let's be straight up with you about Block Island.
Look, I've stared at the charts and I gotta tell you, this 16-day window is a tough one. We're looking at a real dry spell. For the next week and a half, there's just nothing doing. The first surfable moment I can see isn't until Wednesday the 9th, and even then it's only just.
The setup at Block Island rarely breaks, so a blank run like this isn't totally out of the ordinary. The water temp is about 69°F, which is bang on average for this time of year, so the wetsuit call is standard.
From the 2nd right through to the 10th, it's a write-off. We're talking days of onshore wind, choppy slop, and tiny swells. There's a couple of mornings with glassy conditions on the 4th and offshore wind on the 7th, but with swell heights barely pushing 2ft and periods under 10 seconds, there's just not enough energy (34-57) to bother paddling out. Thursday the 10th is a total mess with a risk of storms.
The one day that might get your heart beating is Tuesday the 8th. The afternoon brings a spike to 7ft swell from the southwest, but the period is a short 6 seconds and the wind is howling from the southwest at 22 mph. The combined energy is a solid 316, which is moderate, but with that wind, it's going to be a lumpy, chop-infested mess. For experts only, if you're desperate, but honestly, that wind and short period makes it look more like a kite surfing session than a paddle surf one.
The absolute best of a bad bunch looks to be Wednesday morning the 9th. We get a 5ft swell from the south-southwest, an 8-second period, and clean conditions with a north-easterly cross-offshore breeze at 12 mph. The combined energy is 246. It's only a marginal call, but it's the only window where you might find a rideable wave. The size is pushing it for beginners, but for intermediates with some local knowledge, it could be worth a dawn patrol.
After that, it drops right off again into the second week. There's a little blip on Thursday the 17th with clean condition and some energy (120 to 143), but the swell is under 3ft and the period is 8 seconds. It's a 'maybe' if you're really keen, but nothing to write home about.
So, to sum it up: expect a long, dry wait. Wednesday the 9th is your only real shot at getting wet. Don't hold your breath on the rest.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Fri afternoon. Warm (max 24°C on Thu afternoon, min 19°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 23°C on Tue afternoon, min 16°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 6 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | ESE 7 | ESE 8 | SSW 6 | SSW 7 | E 7 | ENE 5 | ENE 9 | E 11 | E 10 | E 10 | E 9 | SW 4 | SW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 53 | 50 | 27 | 34 | 23 | 23 | 15 | 22 | 21 | 27 | 17 | 66 | 90 | 82 | 98 | 69 | 42 | 36 | 150 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-off | cross | off | off | cross-off | cross | cross-off | cross-off | cross | off | cross-off | on | cross-off | cross-off | cross-on | cross |
High Tide | 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 | 6:03AM0.88m | 6:31PM1.01m | |||||||
Low Tide | 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 | 12:13PM0.02m | 1:06AM0.01m | |||||||
 |  |  |  |  |  | | | | |  | |  | | |  | | | | |
 | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | 7:17 | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — |
mm | 1 | 1 | 1 | 2 | — | 7 | 6 | — | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 24 | 24 | 21 | 21 | 21 | 21 | 22 | 20 | 17 | 21 | 20 | 18 | 20 | 20 | 22 | 23 | 22 |
Feels °C | 21 | 23 | 24 | 25 | 23 | 23 | 22 | 18 | 22 | 17 | 12 | 19 | 17 | 15 | 19 | 18 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 5 | SE 9 | S 5 | SE 8 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SSW 6 | ENE 9 | E 11 | E 10 | E 10 | E 9 | E 9 | E 9 |
| kJ | 53 | 28 | 27 | 11 | 23 | 8 | 9 | 13 | 21 | 27 | 16 | 7 | 90 | 82 | 98 | 69 | 42 | 25 | 15 |
Swell 2 Height (m) Direction Period (s) | SW 4 | SE 9 | SE 6 | SE 8 | SW 4 | ESE 7 | ESE 7 | ESE 8 | SE 8 | SE 9 | E 7 | SE 9 | SSW 6 | SE 9 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 |
| kJ | 1 | 50 | 15 | 34 | 5 | 15 | 15 | 22 | 10 | 3 | 17 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 6 | E 6 | SE 8 | SE 8 | — | E 7 | — | SE 9 | — | SE 9 | SW 5 | S 5 | S 6 | S 6 | S 11 | — |
| kJ | — | — | — | 7 | 12 | 23 | 10 | — | 4 | — | 3 | — | 3 | 1 | 1 | 1 | 1 | 2 | — |
Wind waves Height (m) Direction Period (s) | SE 6 | SSW 4 | SSW 4 | SW 4 | — | — | N 3 | N 4 | ENE 5 | ENE 6 | ENE 5 | ENE 5 | — | NE 3 | — | W 3 | W 4 | SW 4 | SW 6 |
| kJ | 52 | 10 | 20 | 5 | — | — | 5 | 10 | 39 | 66 | 39 | 66 | — | 7 | — | 8 | 9 | 36 | 150 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 689 | 198 | 26 | 59 | 25 | 49 | 85 | 85 | 2583 | 2583 | 25 | 157 | 24 | 49 | 85 | 144 | 131 | 605 | 645 |
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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