Surf Forecasts:
Block Island surf forecast from 2 Sep 2026:
- Best quality surf: Sunday 6 Sep, 2AM (local time) - 3.5ft (1.0m), 6s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 5PM (local time) - 5ft (1.6m), 6s period, SW swell with 195 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 2AM (local time) - 3.5ft (1.0m), 6s 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 2AM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.4m and 7s 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 1.6m 6s and forecast to arrive on Tuesday (Sep 08) 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 1.1m 5s period and expected on Saturday (Sep 05) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 6th Sep) | 3.5ft (1.0m) 6s |
| Best Surf | 2AM (Sun 6th Sep) | 3.5ft (1.0m) 6s |
| Most Powerful | 5PM (Tue 8th Sep) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's be real about what we're looking at here for Block Island.
Honestly, for the next two weeks, this is a tough watch. We’re looking at a long stretch of poor surf conditions. The water temp is sitting right around 69°, which is bang on average for this time of year, so no surprises there.
The first real glimmer of anything worthwhile doesn't show up until Friday, the 11th of September. Even then, it’s only a "1" situation. We get a morning bump with a 4ft E swell, period around 7 seconds, and a light offshore wind from the north. That's clean, but the energy is weak (168) and the swell is pretty short-period. It’s surfable, but you’d be scratching for a ride.
The standout of the whole outlook is Saturday morning, the 12th of September. That's your best bet. Swell jumps to 5ft from the east, period is still short at 6 seconds, but the combined energy is a solid moderate (222). The wind is light and cross-offshore from the west, so it’ll be clean. It’s not a huge swell, but in this context, it’s the pick of the litter. Saturday afternoon though, the wind swings onshore and chops it right up.
Sunday morning, the 13th, is another decent shout. Swell drops a touch to 5ft from the ESE with a 7-second period, energy is still moderate (270), and the wind stays light cross-off from the west. Clean again, but it’s a smaller version of Saturday.
After that, it’s back to the same old story. The wind gets messy, the swell drops off, and we’re left with nothing but poor conditions. We’re talking about a spot that “rarely breaks” anyway, and this forecast is proving that. There’s no big groundswell, no long period, just a lot of short-period windswell and crummy wind.
For the rest of the 16-day window, it's a flat and choppy mess. Don't get your hopes up for the second week. It's all small, weak, and blown out.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Warm (max 25°C on Thu night, min 19°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 17°C on Sun morning). Winds decreasing (fresh winds from the NE on Sat night, light winds from the NNE by Sun morning). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SE 11 | SE 10 | SE 9 | SE 9 | S 5 | S 5 | SE 8 | SSW 5 | SE 8 | SE 8 | SE 8 | ENE 6 | E 8 | E 9 | E 10 | E 9 | E 10 | SW 4 | SW 5 | SW 6 | SSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 94 | 79 | 54 | 50 | 57 | 33 | 32 | 23 | 22 | 14 | 9 | 85 | 30 | 39 | 16 | 15 | 16 | 24 | 77 | 195 | 66 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross | cross-off | glassy | cross | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | off | cross-on | cross-off | cross | cross | cross |
High Tide | 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 | 6:03AM0.88m | 6:31PM1.01m | ||||||||
Low Tide | 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 | 12:13PM0.02m | 1:06AM0.01m | ||||||||
 |  |  |  | |  | |  | | | | | | | | | | | | | | |
 | 6:13 | — | — | 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 | 3 | 1 | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 23 | 22 | 23 | 25 | 23 | 23 | 22 | 20 | 20 | 18 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 23 | 22 |
Feels °C | 16 | 18 | 22 | 21 | 23 | 28 | 25 | 21 | 23 | 16 | 16 | 13 | 18 | 17 | 18 | 18 | 19 | 18 | 18 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 9 | SE 5 | SE 9 | S 5 | SE 8 | ESE 7 | SSW 6 | SE 8 | SSW 6 | ENE 6 | E 8 | E 9 | SW 4 | E 9 | E 10 | E 9 | E 9 | SW 6 | SSW 6 |
| kJ | 94 | 79 | 53 | 37 | 27 | 33 | 32 | 16 | 22 | 14 | 6 | 44 | 30 | 39 | 5 | 15 | 16 | 15 | 6 | 136 | 66 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 4 | SE 9 | SE 9 | SE 8 | SSE 6 | SE 8 | SE 8 | SW 6 | SE 8 | SSW 7 | SW 6 | SSW 6 | E 10 | WSW 4 | SE 8 | SE 8 | SE 9 | E 9 | SE 10 |
| kJ | — | — | 1 | 50 | 27 | 24 | 10 | 17 | 16 | 8 | 9 | 15 | 10 | 7 | 16 | 2 | 3 | 3 | 3 | 6 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 6 | SW 5 | S 8 | ESE 7 | — | — | SE 8 | ESE 8 | SE 9 | SE 9 | SE 9 | — | — | — | SE 9 | E 8 |
| kJ | — | — | — | — | — | 3 | 6 | 1 | 9 | — | — | 10 | 7 | 3 | 3 | 3 | — | — | — | 3 | 6 |
Wind waves Height (m) Direction Period (s) | ESE 5 | ESE 5 | SE 5 | SSW 4 | S 5 | — | — | SSW 5 | NNW 3 | NNE 4 | ENE 5 | ENE 6 | NNW 2 | — | WNW 4 | N 3 | SW 2 | SW 4 | SW 5 | SW 6 | NE 4 |
| kJ | 34 | 34 | 54 | 20 | 57 | — | — | 23 | 5 | 16 | 31 | 85 | 1 | — | 4 | 1 | 2 | 24 | 77 | 195 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 645 | 1095 | 198 | 26 | 117 | 24 | 25 | 152 | 29 | 634 | 85 | 0 | 170 | 130 | 130 | 767 | 159 | 274 | 227 | 221 | 605 |
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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