Surf Forecasts:
Block Island surf forecast from 9 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 8AM (local time) - 4.5ft (1.4m), 5s period, SW swell with 106 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 1.4m 5s and forecast to arrive on Thursday (Aug 13) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 15) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Thu 13th Aug) | 4.5ft (1.4m) 5s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Block Island. This is a point break that rarely breaks, so you’ve got to be on the ball for it to fire. The water temperature is sitting at 72°, which is about average for this time of year.
To be honest, the whole 16-day window is a tough one. There’s nothing that scores well enough to get excited about. The first few days are a write-off with small, weak swell and poor conditions. Sunday the 9th is a bust with a 3ft swell from the SSW at a short 6 seconds, but the wind is messy. The combined energy is only 74, so it’s weak. Monday the 10th offers glassy conditions in the morning on a tiny 2ft swell, but it’s still poor.
The pattern picks up a bit mid-week, but it’s still not worth paddling out for. By Thursday the 13th, there’s a 4ft swell from the SW with a combined energy of 119, which is moderate, but again, the quality is poor. The wind is cross-off on Friday the 14th, but the swell drops right off to 1.0ft.
There’s a bit of a bump on the 17th, with a 8ft swell from the SSW, and the combined energy hits 465, which is strong. But the wind is onshore and messy, making it a poor outlook. Given the size and the wind, this setup looks more interesting for kite surfing than paddle surfing.
The latter part of the window, from the 19th onward, has some longer period swells around 12 seconds, but the wind is onshore or cross-onshore, and the surf quality remains poor. The 24th looks clean with a light offshore, but it’s only a 3ft swell.
Overall, there’s no standout session here. A blank run like this is more normal for an area like this where the spot is inconsistent. It tends not to stay poor for long, and forecasts can change, but for now, keep your expectations low.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sun afternoon, min 22°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 27°C on Thu afternoon, min 17°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the WNW by Thu afternoon). | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 4 | SW 6 | SW 6 | SSW 5 | SSW 5 | WSW 4 | S 6 | S 7 | S 8 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 64 | 75 | 44 | 24 | 10 | 47 | 57 | 48 | 39 | 18 | 10 | 13 | 104 | 79 | 25 | 9 | 13 | 13 | 39 | 72 | 60 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | off | glassy | cross-on | cross-off | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off |
High Tide | 5:43PM1.04m | 6:10AM0.82m | 6:44PM1.08m | 7:08AM0.90m | 7:37PM1.09m | 8:02AM0.97m | 8:27PM1.09m | 8:53AM1.03m | 9:14PM1.05m | 9:42AM1.05m | 9:59PM0.99m | 10:29AM1.05m | 10:44PM0.92m | ||||||||
Low Tide | 10:49AM0.03m | 00:36AM0.05m | 12:02PM-0.01m | 1:27AM0.00m | 1:07PM-0.05m | 2:13AM-0.03m | 2:05PM-0.06m | 2:57AM-0.05m | 3:00PM-0.05m | 3:38AM-0.05m | 3:53PM-0.02m | 4:17AM-0.03m | 4:44PM0.02m | 4:52AM0.02m | |||||||
 | |  | | |  |  | | |  | |  | | | | | | | | | | |
 | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — |
 | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 29 | 28 | 23 | 26 | 27 | 25 | 27 | 27 | 23 | 24 | 24 | 24 | 27 | 25 | 20 | 23 | 24 | 20 | 25 | 24 |
Feels °C | 26 | 27 | 27 | 23 | 26 | 26 | 27 | 26 | 26 | 23 | 24 | 23 | 23 | 21 | 19 | 14 | 18 | 20 | 15 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SE 7 | SSW 6 | SSW 6 | S 6 | SE 10 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | ESE 8 | ESE 8 | SE 8 | SSW 5 | SSW 5 | S 7 | S 6 | S 7 | S 8 | S 8 |
| kJ | 64 | 2 | 44 | 24 | 7 | 4 | 57 | 48 | 39 | 18 | 10 | 7 | 7 | 3 | 25 | 9 | 8 | 13 | 39 | 72 | 60 |
Swell 2 Height (m) Direction Period (s) | SE 7 | E 8 | SE 7 | SE 10 | SE 10 | E 8 | SE 9 | ESE 9 | SE 9 | SE 8 | ESE 8 | SE 14 | SE 14 | SE 10 | SE 9 | ESE 9 | SE 9 | ESE 9 | SE 9 | SE 9 | SE 9 |
| kJ | 9 | 1 | 2 | 4 | 4 | 1 | 3 | 8 | 3 | 3 | 7 | 8 | 7 | 4 | 13 | 9 | 13 | 8 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | E 8 | — | SE 10 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | — | S 14 | SE 11 | E 7 | SE 13 | SE 13 | W 4 | S 13 | — | SE 12 | — | W 4 |
| kJ | 1 | — | 4 | 1 | 1 | 1 | 1 | 1 | 1 | — | 4 | 5 | 1 | 7 | 7 | 1 | 3 | — | 6 | — | 1 |
Wind waves Height (m) Direction Period (s) | — | SSW 6 | — | — | SSW 5 | SSW 6 | — | — | NNW 3 | — | — | SSW 4 | SW 6 | SW 6 | NW 3 | NW 3 | WSW 4 | NNW 4 | NNW 3 | WNW 3 | N 4 |
| kJ | — | 75 | — | — | 10 | 47 | — | — | 3 | — | — | 13 | 104 | 79 | 3 | 4 | 11 | 26 | 7 | 4 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 221 | 49 | 769 | 230 | 24 | 24 | 49 | 49 | 1032 | 2553 | 249 | 1098 | 1422 | 634 | 445 | 749 | 846 | 49 | 24 | 25 |
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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