
Surf Forecasts:
Block Island surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 2AM (local time) - 4.5ft (1.4m), 6s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 9 Aug, 5AM (local time) - 4.5ft (1.4m), 7s period, SSW swell with 165 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 2AM (local time) - 4.5ft (1.4m), 6s period with SSW 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 (Aug 09) at 2AM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.3m and 7s. 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 1.4m 7s and forecast to arrive on Sunday (Aug 09) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Tuesday (Aug 11) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 9th Aug) | 4.5ft (1.4m) 6s |
| Best Surf | 2AM (Sun 9th Aug) | 4.5ft (1.4m) 6s |
| Most Powerful | 5AM (Sun 9th Aug) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let’s get into it.
The swell window over the next couple of weeks is pretty grim, to be honest. We’ve got a long stretch of small, weak, and messy conditions with hardly anything worth paddling out for. The good news is there’s a tiny glimmer of hope right at the end of the forecast, but you’re gonna have to be patient.
Right now, through the 12th, it’s all about onshore and cross-shore winds messing up what little swell there is. The waves are small, mostly around 2ft to 4ft, with short, weak 5-7 second periods. The energy is weak to moderate, reading (65) to (140) on the combined scale, but it’s all chop and lump. Not worth your time.
The 13th and 14th stay poor, with the swell dropping even more. There’s a brief moment on the morning of the 14th where it goes glassy with light NE winds, but the swell is only 2ft with a 5-second period. It’s clean, but there’s just not enough push to make it fun.
The 15th through the 20th is a write-off. More small, weak swell with persistent onshore and cross-onshore winds, and the energy drops into the weak range, mostly under (100). The 17th sees a long-period 14-second swell from the SSE, but it’s tiny at 1ft, and the afternoon gets blown out by a 35 km/h cross-shore. Forget it.
Now, for the one and only standout. Mark your calendar for Friday, the 21st of August. Things finally line up for Block Island (Block Island). The morning is clean with a cross-offshore breeze, and the swell kicks up to 4ft from the SSW. The energy jumps to a moderate (121). The afternoon gets even better: the swell builds to 5ft from the SW, with a 6-second period, and the energy pushes up to (161). The wind goes light and offshore from the NE, keeping it clean. The comment says it’s “surfable waves but very ordinary conditions,” and honestly, that’s a solid 1 out of 10 on the score, which is the best we’re gonna see in this whole window.
It’s still a short-period swell, so it won’t have the punch of a groundswell, but it’s the only time in the next two weeks you’ll get clean, rideable waves over a meter. It’s a point break, so it should handle the short period better than a beach break. Crowds are often a factor here, so expect company.
The water is a bit colder than normal for this time of year, sitting at 70°F, which is 2°F below the average. Not crazy, but you’ll feel it.
So, there you have it. A whole lot of nothing for most of the next two weeks, but keep that Friday the 21st open. It’s the best on offer, and it’s not even that great. But it’s something.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Warm (max 29°C on Sun afternoon, min 23°C on Fri night). Winds decreasing (fresh winds from the SW on Sat afternoon, light winds from the SE by Mon morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 28°C on Tue night, min 21°C on Wed morning). Wind will be generally light. | |||||||||||||||||||
Fri 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 5 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | S 6 | S 6 | S 7 | SSW 6 | S 5 |
Wave Graph | ||||||||||||||||||||
47 | 45 | 70 | 99 | 145 | 129 | 131 | 62 | 40 | 35 | 68 | 42 | 40 | 45 | 35 | 23 | 9 | 22 | 13 | 21 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-on | cross-off | cross | cross | off | on | cross-on | cross | cross | cross | off | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 3:20PM0.97m | 3:52AM0.71m | 4:35PM1.00m | 5:04AM0.75m | 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 | |||||||
Low Tide | 10:36PM0.14m | 9:31AM0.06m | 11:40PM0.10m | 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 | |||||||
— | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | |
7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:47 | — | |
mm | — | 5 | — | — | 6 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 1 |
Temp °C | 28 | 27 | 24 | 26 | 26 | 25 | 29 | 28 | 23 | 25 | 25 | 24 | 27 | 28 | 23 | 23 | 23 | 23 | 24 | 24 |
Feels °C | 28 | 27 | 25 | 25 | 26 | 25 | 26 | 27 | 22 | 23 | 24 | 24 | 26 | 28 | 22 | 24 | 22 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SSW 6 | SSW 7 | ESE 8 | SSW 6 | SSW 6 | SE 10 | SE 10 | SSW 5 | SE 9 | SSW 6 | SSW 6 | S 6 | S 6 | S 7 | SSW 6 | ESE 9 |
16 | 23 | 33 | 16 | 145 | 129 | 6 | 62 | 40 | 4 | 4 | 42 | 3 | 45 | 35 | 23 | 9 | 22 | 13 | 8 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | SE 7 | ESE 8 | E 8 | SE 7 | SE 10 | E 8 | E 8 | SE 9 | E 8 | SE 9 | SE 8 | SE 8 | SSW 5 | SE 8 | SE 8 | SE 13 |
2 | 1 | 2 | 2 | 8 | 6 | 1 | 2 | 4 | 1 | 1 | 3 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | E 9 | — | E 11 | SE 10 | E 8 | E 8 | — | E 8 | — | E 8 | E 8 | E 8 | ENE 3 | SE 10 | SE 10 | SE 7 |
— | — | — | — | 2 | — | 2 | 4 | 1 | 1 | — | 1 | — | 1 | 1 | 1 | 1 | 4 | 4 | 2 | |
Wind waves Height (m) Direction Period (s) | SSW 6 | SSW 5 | SSW 6 | SSW 6 | — | — | SW 7 | — | — | SSW 6 | SSW 6 | — | SSW 5 | — | NE 3 | E 3 | — | — | S 3 | S 5 |
47 | 45 | 70 | 99 | — | — | 131 | — | — | 35 | 68 | — | 40 | — | 1 | 1 | — | — | 6 | 21 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1805 | 29 | 24 | 226 | 0 | 24 | 26 | 24 | 445 | 2556 | 42 | 49 | 99 | 49 | 642 | 912 | 767 | 870 | 702 | 249 |
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)
Latest Updates
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.











