Surf Forecasts:
Block Island surf forecast from 23 Aug 2026:
- Most powerful swell: Friday 28 Aug, 5AM (local time) - 3.5ft (1.0m), 8s period, SE swell with 129 kJ wave energy.
Best Forecast Surf Conditions for Block Island this week:
The most powerful waves expected at Block Island in the next 16 days are 1.0m 8s and forecast to arrive on Friday (Aug 28) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Monday (Aug 24) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Fri 28th Aug) | 3.5ft (1.0m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, Rusty here. Let's chew the fat on what's in the water for us.
The next couple of weeks? It's a ghost town out there. We're looking at a long stretch of nothing until we get a sniff of something real on September 5th. That's a lot of quiet days.
The water temp is around 70°, which is just normal for the season.
The first real glimmer of hope is on Saturday, September 5th. Block Island is the spot. We're expecting a clean 4ft swell from the SSE, with a 13-second period – that's a decent groundswell, packing some good energy. The wind is set to be offshore from the NW, which will keep the face clean and inviting. It's a big enough wave to be a solid intermediate session, but at 4ft, it's getting a bit heavy for the newbies. Because it's a long-period swell, it'll have more shape and punch, but it might be a bit straight-breaking on a beach. And you can bet the crowds will be out for this one. This is the standout, the only real highlight.
The next day, Sunday, September 6th, is still a looker. We've got a smaller 3ft swell from the SE, with an 11-second period, and a gentle offshore breeze from the NNE. The energy is moderate. It's a step down from Saturday, but it's still a rideable wave.
After that, it's back to the same small, chopped-up stories. The 5th and 6th are your only real chances.
So, to put it plain: the first week is a donut. The best you're going to get is the morning of September 5th at Block Island. It's a bit of a reach, but it's better than staying on the beach.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Warm (max 25°C on Sun night, min 18°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri morning. Warm (max 25°C on Fri morning, min 18°C on Wed morning). Winds decreasing (fresh winds from the SW on Wed afternoon, light winds from the S by Fri morning). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 12 | SE 12 | SE 7 | SSE 6 | SSW 6 | SSW 6 | SW 6 | SE 10 | SW 5 | ESE 9 | SE 8 | SE 8 | ESE 8 | SE 9 | SE 6 | S 7 | SE 8 | SSW 6 | SE 8 | SSW 7 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 23 | 22 | 45 | 66 | 64 | 37 | 26 | 27 | 37 | 53 | 57 | 49 | 41 | 65 | 100 | 95 | 78 | 51 | 30 | 45 | 39 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-on | cross-on | on | cross-on | cross | cross-on | cross-off | glassy | cross-on | cross-off |
High Tide | 5:53PM0.83m | 6:12AM0.69m | 6:36PM0.86m | 6:56AM0.76m | 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 | ||||||||
Low Tide | 11:15AM0.22m | 00:18AM0.20m | 12:06PM0.18m | 00:57AM0.14m | 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 | |||||||
 |  |  | | |  | | | | | |  |  | | |  | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | — | 7:34 | — | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — |
mm | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — |
Temp °C | 22 | 24 | 25 | 23 | 23 | 23 | 21 | 22 | 22 | 20 | 22 | 24 | 24 | 24 | 24 | 25 | 23 | 24 | 24 | 26 | 25 |
Feels °C | 22 | 24 | 23 | 22 | 20 | 20 | 17 | 19 | 19 | 17 | 19 | 22 | 23 | 23 | 25 | 27 | 22 | 24 | 24 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | E 7 | SSW 5 | SSE 6 | SE 11 | SSW 6 | SE 6 | SE 6 | SW 5 | ESE 9 | SE 8 | SE 8 | ESE 8 | SE 9 | SE 6 | SE 8 | SE 8 | SSW 6 | S 6 | SSW 7 | SW 6 |
| kJ | 10 | 9 | 39 | 66 | 31 | 37 | 10 | 10 | 37 | 53 | 57 | 49 | 41 | 65 | 100 | 95 | 78 | 42 | 25 | 45 | 39 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 12 | SE 7 | SE 12 | SE 7 | SE 11 | SE 11 | SE 10 | SE 10 | SW 5 | — | S 6 | WSW 4 | SSW 6 | E 11 | E 10 | E 10 | SE 8 | SE 8 | SE 8 | SE 8 |
| kJ | 11 | 22 | 45 | 21 | 2 | 18 | 18 | 27 | 25 | 13 | — | 3 | 2 | 3 | 2 | 2 | 2 | 51 | 30 | 31 | 34 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 8 | SE 12 | E 7 | E 6 | ESE 7 | SE 11 | E 6 | ESE 6 | E 13 | — | E 12 | SE 9 | E 11 | — | — | — | SSE 6 | E 9 | — | SSE 6 |
| kJ | 23 | 11 | 22 | 1 | 1 | 9 | 18 | 1 | 3 | 3 | — | 3 | 13 | 2 | — | — | — | 13 | 2 | — | 3 |
Wind waves Height (m) Direction Period (s) | ESE 3 | S 3 | WSW 5 | SW 5 | SSW 6 | W 4 | SW 6 | SW 4 | — | WNW 3 | SW 4 | SW 4 | SSW 6 | S 4 | SSW 6 | S 7 | SSW 6 | — | NNW 3 | — | — |
| kJ | 4 | 5 | 12 | 6 | 64 | 5 | 26 | 16 | — | 4 | 13 | 12 | 18 | 15 | 24 | 92 | 51 | — | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 702 | 409 | 25 | 24 | 24 | 24 | 198 | 207 | 49 | 24 | 634 | 152 | 159 | 912 | 24 | 24 | 24 | 24 | 24 | 204 | 25 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest