
Surf Forecasts:
Block Island surf forecast from 5 Aug 2026:
- Best quality surf: Saturday 8 Aug, 5AM (local time) - 4.5ft (1.3m), 6s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 8PM (local time) - 5ft (1.6m), 7s period, SSW swell with 222 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 5AM (local time) - 4.5ft (1.3m), 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 Saturday (Aug 08) at 5AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.5m and 8s. Another secondary swell of 0.1m and 9s is also forecast. 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 1.6m 7s and forecast to arrive on Monday (Aug 10) 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 0.3m 2s period and expected on Wednesday (Aug 12) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 8th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 5AM (Sat 8th Aug) | 4.5ft (1.3m) 6s |
| Most Powerful | 8PM (Mon 10th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's talk about Block Island.
Right off the bat, I gotta be straight with you – the next couple of weeks are looking pretty grim for a proper paddle. We’re staring down a long, dry spell. There’s nothing worth getting excited about until the morning of Monday, 18th August. That's a solid gap of almost two weeks with nothing but poor surf conditions. The water temp is sitting at 69.6°, which is about 1.6° cooler than usual for this time of year – nothing crazy, just a little off.
Let’s break down the wait. From now through the end of the second week, it’s all small, weak, and choppy. We’re looking at ankle to thigh-high slop from the SSW, mostly around 1.6 ft to 3.6 ft, with short-period windswell of 6 to 7 seconds. The combined energy is weak, mostly in the double digits (like 65 to 137), and the wind is constantly coming from the SW, making it cross-onshore and bumpy. Not a single standout in that whole stretch – just a lot of frustration.
There is a brief flicker of hope on Tuesday, 11th, and Wednesday, 12th, with some clean, glassy conditions. But don't be fooled – that's with tiny 2.0 ft to 3.3 ft swell. It’s clean but flat. Not worth the drive.
Finally, on the morning of Monday, 18th August, we see our best chance. The swell bumps up to 4.9 ft from the south, with a period of 9 seconds. The combined energy jumps to 339, which is a moderate, punchy wave. The wind is light and cross-offshore from the NNE (10 km/h), so it'll be clean. This is the one to keep an eye on. The break at Block Island is a point break, which loves that southerly swell direction, and with that light offshore wind, it could get real fun. Just be aware this spot rarely breaks, so when it does, it’s a bit of an event. The crowd situation often gets busy, so get out there early.
Now, Tuesday afternoon, 18th, we still have some size (4.6 ft) but the quality drops off fast as the wind shifts.
After that, the swell fades again and the wind turns messy. We get another spike on the 17th with bigger swell (5.6 ft to 6.2 ft), but the wind is onshore and cross-onshore, creating lumpy, choppy conditions. That’s more of a kite-surfing kind of day than a clean surf day.
So, to sum it up: wait for Monday, 18th August. That morning window with the clean 4.9 ft south swell and light offshore wind is the only real chance of a decent session on offer. Hold out for that one.
Short Range ForecastLight rain (total 7mm), mostly falling on Fri night. Warm (max 29°C on Fri afternoon, min 23°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Warm (max 29°C on Sun afternoon, min 24°C on Sat morning). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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 7 | SSW 7 | SE 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SSW 6 | SSW 7 |
Wave Graph | |||||||||||||||||||||
51 | 35 | 19 | 41 | 71 | 104 | 68 | 70 | 108 | 75 | 85 | 145 | 96 | 113 | 145 | 132 | 181 | 158 | 73 | 57 | 58 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross | cross-off | cross-off | cross |
High Tide | 1:08PM0.94m | 1:35AM0.74m | 2:09PM0.95m | 2:40AM0.71m | 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 | ||||||||
Low Tide | 7:51PM0.16m | 7:16AM0.08m | 9:20PM0.16m | 8:19AM0.08m | 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 | ||||||||
5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | |
— | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | |
mm | — | — | — | — | — | — | — | — | 7 | 1 | — | 1 | — | — | — | — | — | 3 | — | — | — |
Temp °C | 23 | 25 | 25 | 25 | 27 | 26 | 26 | 29 | 27 | 24 | 25 | 25 | 25 | 29 | 27 | 25 | 28 | 28 | 25 | 28 | 23 |
Feels °C | 23 | 23 | 26 | 27 | 26 | 27 | 28 | 28 | 26 | 24 | 24 | 25 | 26 | 27 | 25 | 27 | 27 | 27 | 24 | 27 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SE 6 | SE 6 | SE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | SSW 6 | ESE 7 | SE 10 | SE 10 | SE 10 | SSW 7 | SSW 6 | SSW 6 | SSW 7 |
51 | 35 | 19 | 9 | 9 | 9 | 9 | 16 | 23 | 75 | 16 | 10 | 96 | 5 | 4 | 4 | 4 | 158 | 73 | 57 | 58 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 7 | SSW 6 | SE 8 | E 9 | E 10 | E 10 | E 9 | E 9 | SE 8 | E 9 | E 9 | SSE 7 | — | SE 10 | E 8 | E 8 | SE 10 | SE 9 | SE 9 | SE 9 |
36 | 28 | 13 | 10 | 2 | 2 | 2 | 2 | 1 | 33 | 2 | 2 | 5 | — | 4 | 1 | 1 | 4 | 3 | 3 | 3 | |
Swell 3 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | — | — | — | — | — | E 9 | — | — | E 8 | E 11 | — | — | — | E 8 | E 8 | E 8 | E 8 |
2 | 2 | 2 | 2 | — | — | — | — | — | 1 | — | — | 1 | 2 | — | — | — | 1 | 1 | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | SSW 4 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | WSW 6 | SSW 6 | SSW 6 | — | SSW 7 | SSW 6 | SSW 6 | SSW 6 | — | — | — | — |
— | — | 7 | 41 | 71 | 104 | 68 | 70 | 108 | 28 | 85 | 145 | — | 113 | 145 | 132 | 181 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 1148 | 207 | 221 | 645 | 25 | 34 | 221 | 24 | 219 | 226 | 24 | 24 | 219 | 29 | 24 | 24 | 24 | 24 | 24 | 85 |
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.











