Surf Forecasts:
Block Island surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 8AM (local time) - 5ft (1.5m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 2AM (local time) - 6ft (1.8m), 6s period, SW swell with 261 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 5AM (local time) - 3.5ft (1.0m), 7s period with S 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 Saturday (Aug 29) at 5AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.6m and 8s. 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 1.8m 6s and forecast to arrive on Tuesday (Sep 01) 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 1.2m 7s period and expected on Tuesday (Sep 01) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 29th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 8AM (Tue 1st Sep) | 5ft (1.5m) 7s |
| Most Powerful | 2AM (Tue 1st Sep) | 6ft (1.8m) 6s |
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 the surf outlook for Block Island for the next couple of weeks.
Honestly, I gotta be straight with you—this is a tough one. The whole 16-day window is looking pretty grim with no standout sessions. We’ve got a long stretch of poor surf conditions, with only a few days bumping up to "marginal" at best.
The first real chance to even think about paddling out comes on Tuesday, September 1st. The morning is looking like the most hopeful moment, with a combined swell energy of 207 (moderate) and a 4ft swell from the SSW. The wind is light and cross-shore, which is okay, but it’s still only a marginal call. The period is a short 7 seconds, so it’ll be a bit chopped up and won’t have much push. This is more of a "check it if you’re desperate" kind of morning.
After that, it’s back to the same old story. The swell sticks around the 1ft to 3ft range for days, with periods all over the place and winds that are usually cross or cross-on. The best of the rest is maybe Wednesday, September 9th. The morning and afternoon both show clean conditions with a cross-offshore wind from the WNW, and the swell bumps up to 4ft and 5ft from the SSW, with a combined energy of 117 and 139 (still moderate). The period is still short at 6 seconds, so the waves will be a bit weak and crumbly, but at least it’ll be clean. This is far out though, so don’t bank on it.
The rest of the time it’s a lot of nothing. Long gaps of days with no recommendations. The swell is tiny, the wind is messy, and the water temp is around 69°F, which is a hair cooler than usual for this time of year, but nothing to worry about. For Block Island, this kind of blank run isn’t unusual, but it still stings.
If you’re a kite surfer, you might find some fun in the windier, choppier afternoons, but for us paddle surfers, it’s a real struggle. Keep an eye on the long-range, but don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 24°C on Thu morning, min 19°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri afternoon. Warm (max 24°C on Fri morning, min 18°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 | SW 4 | WSW 5 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SE 8 | SE 8 | S 7 | SSW 7 | S 6 | S 6 | SE 8 | SE 8 | SE 8 | SSW 4 | SSW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 29 | 24 | 35 | 62 | 72 | 70 | 74 | 77 | 72 | 55 | 90 | 155 | 77 | 54 | 36 | 18 | 18 | 32 | 29 | 61 | 261 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on | on | cross-off | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | cross-on | cross | cross | cross |
High Tide | 7:13PM0.89m | 7:35AM0.82m | 7:47PM0.91m | 8:10AM0.87m | 8:18PM0.93m | 8:43AM0.91m | 8:50PM0.94m | 9:14AM0.95m | 9:25PM0.94m | 9:47AM0.98m | 10:03PM0.92m | 10:23AM0.99m | 10:44PM0.88m | ||||||||
Low Tide | 12:50PM0.15m | 1:31AM0.09m | 1:30PM0.11m | 2:02AM0.05m | 2:08PM0.09m | 2:30AM0.02m | 2:43PM0.07m | 2:55AM0.01m | 3:19PM0.05m | 3:22AM0.00m | 3:56PM0.05m | 3:52AM0.01m | 4:38PM0.06m | 4:27AM0.03m | |||||||
 | |  | | | |  | |  |  |  |  | | | | | | | | |  | |
 | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — |
mm | — | — | — | — | — | — | — | — | 2 | — | 7 | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 20 | 23 | 23 | 20 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 22 | 20 | 21 | 23 | 22 | 23 | 23 | 24 | 28 | 27 |
Feels °C | 17 | 20 | 21 | 20 | 21 | 20 | 23 | 22 | 23 | 25 | 24 | 22 | 20 | 19 | 21 | 21 | 21 | 22 | 24 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 10 | SW 5 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SSE 5 | SSW 6 | S 7 | SSW 7 | S 6 | S 6 | S 6 | SSW 6 | SE 8 | SE 8 | SE 6 | SSE 16 |
| kJ | 17 | 17 | 28 | 62 | 72 | 70 | 74 | 77 | 72 | 39 | 48 | 155 | 77 | 54 | 36 | 17 | 11 | 32 | 22 | 6 | 25 |
Swell 2 Height (m) Direction Period (s) | ESE 6 | SE 6 | SE 10 | SW 5 | S 6 | S 6 | — | — | E 11 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 5 | — | — | SE 8 | SE 16 |
| kJ | 8 | 10 | 26 | 11 | 3 | 6 | — | — | 2 | 55 | 90 | 54 | 33 | 31 | 31 | 18 | 6 | — | — | 11 | 40 |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 6 | ESE 6 | E 6 | — | — | — | — | — | SW 6 | E 10 | E 9 | E 9 | E 9 | SE 6 | E 9 | SE 8 | — | — | SE 17 | — |
| kJ | 29 | 1 | 3 | 1 | — | — | — | — | — | 11 | 2 | 2 | 2 | 2 | 1 | 2 | 18 | — | — | 12 | — |
Wind waves Height (m) Direction Period (s) | W 3 | SW 4 | WSW 5 | SW 5 | SW 5 | SW 4 | SSW 4 | SSW 4 | SSW 5 | — | — | — | — | — | ENE 3 | ESE 6 | — | SSW 5 | SSW 4 | SSW 5 | SW 6 |
| kJ | 8 | 24 | 35 | 11 | 6 | 5 | 9 | 37 | 60 | — | — | — | — | — | 1 | 17 | — | 17 | 29 | 61 | 261 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 159 | 207 | 49 | 24 | 34 | 133 | 152 | 1148 | 195 | 26 | 24 | 24 | 24 | 24 | 24 | 24 | 2593 | 2371 | 2583 | 81 | 24 |
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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