Surf Forecasts:
Block Island surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 8AM (local time) - 4.5ft (1.3m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 9 Aug, 5AM (local time) - 5ft (1.5m), 7s period, SSW swell with 192 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 8AM (local time) - 4.5ft (1.3m), 7s 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 8AM. The primary swell is predicted to be 1.3m and 7s 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 1.5m 7s and forecast to arrive on Sunday (Aug 09) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Aug 12) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 9th Aug) | 4.5ft (1.3m) 7s |
| Best Surf | 8AM (Sun 9th Aug) | 4.5ft (1.3m) 7s |
| Most Powerful | 5AM (Sun 9th Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let me level with you straight up – we're looking at a flat spell for Block Island. I'm not gonna sugarcoat it. The first recommendation doesn’t even show up until late in the game, and it’s a real stretch.
Right out the gate, we're in a drought. From now until the 19th of August, there isn't a single day worth paddling out. That's near enough to two weeks of nothing doing. You'll see tiny swells in the 1ft to 4ft range passing through, but the wind is all wrong – mostly cross or cross-onshore, creating chop and lumpy conditions. The water is hanging around 69°F at the start, which feels a bit colder than normal for this time of year, but with no waves, you’re not missing much.
The only glimmer – and I mean a faint one – is on Wednesday the 19th. We finally get a pulse of clean surf at Block Island. For the morning and afternoon, the swell pushes up to 5ft out of the SSW, with a short period of 6 seconds. Now the energy is moderate, but the wind is a clean, cross-offshore breeze from the WNW and W. That means the surface will be smooth and glassy. It’s a rare break here, and crowds are often an issue, so get there early if you're keen on a few clean, short-period lines. Just know, at 5ft, it might be pushing it for total beginners.
Besides that one day, the last few days of the window taper right back off into tiny, weak surf. We’re looking at a classic summer flat spell for Block Island. Keep your eye on the forecasts, but for now, it’s a waiting game.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Warm (max 28°C on Fri afternoon, min 22°C on Sat morning). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Sun afternoon, min 23°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 5 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SW 5 | SW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 53 | 127 | 68 | 51 | 92 | 72 | 90 | 145 | 134 | 113 | 64 | 39 | 37 | 46 | 53 | 42 | 53 | 66 | 28 | 33 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross | off | cross-on | cross-on | cross | cross | cross | off | cross-off | cross-on | cross-on |
High Tide | 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 | 8:02AM0.97m | 8:27PM1.09m | |||||||
Low Tide | 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 | 2:05PM-0.06m | 2:57AM-0.05m | |||||||
 |  | | |  |  | | |  | | | | |  |  | | | | |  | |
 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — |
 | 7:57 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — |
mm | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 27 | 27 | 28 | 28 | 23 | 25 | 26 | 25 | 29 | 29 | 25 | 27 | 27 | 25 | 25 | 27 | 23 | 25 | 25 |
Feels °C | 27 | 28 | 29 | 28 | 27 | 23 | 23 | 27 | 26 | 27 | 29 | 24 | 26 | 27 | 25 | 25 | 28 | 23 | 24 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 7 | SSW 6 | SE 8 | SE 8 | SSW 6 | SE 8 | SE 8 | SSW 7 | SE 7 | SSW 6 | SSW 6 | SSW 6 | SE 10 | SE 9 | SE 9 | SSW 6 | SSW 6 | SSW 6 | SSW 6 |
| kJ | 19 | 8 | 68 | 16 | 23 | 72 | 16 | 10 | 134 | 2 | 64 | 39 | 37 | 4 | 3 | 3 | 43 | 66 | 28 | 33 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 10 | SE 7 | E 9 | E 9 | SE 8 | E 9 | E 9 | SE 8 | E 8 | SE 7 | SE 10 | SE 10 | E 8 | E 8 | E 8 | SE 9 | SE 8 | ESE 8 | SE 8 |
| kJ | 2 | 2 | 9 | 2 | 1 | 33 | 2 | 2 | 2 | 1 | 2 | 4 | 4 | 1 | 1 | 1 | 3 | 3 | 7 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | E 9 | — | — | E 9 | — | — | E 8 | — | SE 10 | E 8 | E 8 | — | — | — | — | S 15 | S 14 | SE 14 |
| kJ | — | — | 2 | — | — | 1 | — | — | 1 | — | 4 | 1 | 1 | — | — | — | — | 4 | 4 | 8 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 6 | — | SSW 6 | SW 6 | WSW 6 | SSW 6 | SSW 6 | — | SSW 6 | — | — | — | SSW 5 | SW 5 | SW 5 | SSW 6 | — | W 5 | — |
| kJ | 53 | 127 | — | 51 | 92 | 40 | 90 | 145 | — | 113 | — | — | — | 46 | 53 | 42 | 53 | — | 4 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 645 | 24 | 24 | 221 | 81 | 217 | 219 | 24 | 36 | 26 | 24 | 769 | 642 | 249 | 49 | 280 | 26 | 24 | 634 | 642 |
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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