Surf Forecasts:
Block Island surf forecast from 26 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 8PM (local time) - 2.5ft (0.7m), 9s period, SE swell with 77 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 0.7m 9s and forecast to arrive on Wednesday (Aug 26) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Wednesday (Aug 26) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Wed 26th Aug) | 2.5ft (0.7m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let’s talk Block Island for the next sixteen days. I’ll level with you—it’s a rough run. This wave rarely lights up, and the forecast ain’t showing any magic. No real surf to speak of, so let’s just walk through the scraps.
Starting Wednesday August 26th, we’ve got 2 ft from the southeast, cross-shore wind, and weak energy (63). It’s a mess. Thursday and Friday are more of the same: small SE swell, onshore breeze, and choppy conditions. Thursday afternoon bumps up to 104 energy (moderate), but it’s still ugly.
Saturday the 29th gives us a clean moment early—NE cross-off breeze, 3 ft from the south, but only a 7-second period. It’s clean, but small (107 energy). By Sunday, we’re back to knee-high junk.
Monday the 31st has another clean slot late with WNW winds, but the swell is only 3 ft from the SW, period a weak 5 seconds, energy 47. Gutless. Tuesday September 1st is wet and onshore.
Wednesday September 2nd morning shapes up clean with NNE cross-off breeze, 2 ft SE swell at a long 12 seconds, energy 93. Still tiny. The pick of the whole stretch is Monday September 7th afternoon—glassy conditions, 3 ft from the SW, period 5 seconds, energy 109. It’s dead smooth, but the swell is weak and short.
Thursday September 10th morning offers clean 1 ft from the SE with NNE wind, energy 35. Barely there.
No standout waves. The best bet is that glassy Monday the 7th, but don’t expect much. For a break that rarely works, this kind of blank run is normal. Just sit tight, and check back in later.
Rusty, out.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 24°C on Thu morning, min 18°C on Wed morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 18°C on Sat morning). Winds increasing (light winds from the SE on Sat afternoon, fresh winds from the SW by Sun night). | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SE 8 | S 6 | SE 8 | S 7 | S 7 | ESE 8 | S 6 | SE 8 | SE 8 | SW 5 | SW 5 | SSW 5 |
Wave Graph  | |||||||||||||||||||
 kJ | 26 | 62 | 72 | 70 | 74 | 77 | 72 | 57 | 54 | 51 | 73 | 55 | 45 | 18 | 35 | 24 | 40 | 31 | 19 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | off | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross |
High Tide | 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 | 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 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — |
 | 7:30 | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — |
mm | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 20 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 25 | 19 | 21 | 21 | 22 | 23 | 23 | 23 | 27 | 26 |
Feels °C | 21 | 20 | 21 | 22 | 23 | 22 | 23 | 25 | 24 | 25 | 17 | 21 | 21 | 20 | 21 | 20 | 21 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | S 5 | S 6 | SE 8 | S 7 | S 7 | S 6 | S 6 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 5 |
| kJ | 13 | 62 | 72 | 70 | 74 | 77 | 72 | 43 | 41 | 51 | 73 | 55 | 28 | 18 | 35 | 24 | 16 | 10 | 19 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SW 4 | S 6 | S 6 | E 8 | E 11 | E 11 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | ESE 8 | SE 7 | SSW 6 | — | — | S 17 | SE 6 |
| kJ | 26 | 4 | 3 | 6 | 1 | 9 | 2 | 57 | 54 | 30 | 32 | 32 | 45 | 16 | 11 | — | — | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | ESE 6 | E 6 | — | — | — | — | — | E 10 | E 10 | E 9 | E 10 | ESE 5 | SE 9 | SE 8 | E 9 | — | — | — | SE 8 |
| kJ | 3 | 1 | — | — | — | — | — | 2 | 2 | 2 | 2 | 9 | 12 | 11 | 2 | — | — | — | 10 |
Wind waves Height (m) Direction Period (s) | W 4 | — | SW 6 | SW 4 | SSW 4 | SSW 4 | SSW 5 | SW 5 | — | — | NE 2 | — | — | — | — | SW 4 | SW 5 | SW 5 | — |
| kJ | 9 | — | 13 | 10 | 7 | 18 | 69 | 17 | — | — | 1 | — | — | — | — | 14 | 40 | 31 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 49 | 24 | 1084 | 24 | 133 | 1084 | 201 | 24 | 26 | 24 | 24 | 26 | 24 | 645 | 702 | 702 | 1505 | 29 | 49 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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.
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