Surf Forecasts:
Block Island surf forecast from 20 Jul 2026:
- Best quality surf: Thursday 23 Jul, 5AM (local time) - 8ft (2.5m), 10s period, S swell with offshore winds.
- Most powerful swell: Wednesday 22 Jul, 11PM (local time) - 11ft (3.5m), 9s period, SSW swell with 1,859 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 5AM (local time) - 8ft (2.5m), 10s period with S 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 Thursday (Jul 23) at 5AM. The primary swell is predicted to be 2.5m and 10s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Block Island in the next 16 days are 3.5m 9s and forecast to arrive on Wednesday (Jul 22) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Jul 23) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 23rd Jul) | 8ft (2.5m) 10s |
| Best Surf | 5AM (Thu 23rd Jul) | 8ft (2.5m) 10s |
| Most Powerful | 11PM (Wed 22nd Jul) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a good, hard look at what Block Island has in store for us. This is a tough stretch, and I gotta be straight with you – the good stuff is few and far between.
We're looking at a long wait for anything worthwhile. The first real chance to even think about paddling out doesn't come until Thursday the 23rd of July, and even then, it's a bit of a gamble. Before that, Monday through Wednesday are a write-off. We’ve got a mix of weak, short-period windswell and onshore winds that are just going to chop everything up. It’s a desert out there.
The first glimmer of hope arrives on Thursday morning, July 23rd. A clean S swell, coming in at 8 ft with a period of 10 seconds. That's got some decent energy behind it (1229). The wind is offshore from the NW, which is a game-changer for this spot. The wave comment says "clean," and you know what, for a break that rarely breaks, this is a real moment. This swell is going to be too big for beginners, but for the experienced crew, it could be a proper session. The water is sitting at 67°, which is a bit colder than normal for this time of year, so don't forget the booties.
The rest of the period is a bit of a letdown. After that Thursday morning peak, the swell drops off quickly and the winds shift back onshore, turning it messy. The energy weakens right back down into the double digits (84-94). There’s a brief moment on Wednesday morning, July 30th with another clean, cross-off wind from the NE (4 ft, 9s, 272 energy), but it’s a very marginal call. Then, on Sunday, August 2nd, we see another pulse of SW swell, hitting 7 ft in the morning with clean, cross-off W winds (379 energy). That’s a Sunday morning special, but with the inconsistency of this spot, you’d want to be ready to go the moment it looks good.
Honestly, the standout here is the short window on Thursday morning, July 23rd. The combination of size, period, and that rare glassy offshore wind makes it the only real highlight on the whole 16-day chart. The rest is just a waiting game for a better forecast.
Rusty
Short Range ForecastHeavy rain (total 27mm), heaviest during Tue night. Warm (max 24°C on Wed night, min 18°C on Wed night). Winds increasing (calm on Mon morning, strong winds from the SSW by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu night, min 17°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 8 | SSW 7 | S 7 | SSW 7 | S 6 | S 7 | SSW 9 | SSW 8 | S 10 | S 10 | S 9 | S 9 | SSW 8 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | ESE 7 | ESE 7 | SE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 96 | 71 | 66 | 37 | 91 | 250 | 795 | 974 | 1614 | 1229 | 575 | 339 | 113 | 99 | 96 | 75 | 73 | 93 | 83 | 93 | 79 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross | cross-off | glassy | on | cross-on | on | cross-on | glassy | cross-on | on | cross |
High Tide | 1:37PM0.91m | 1:44AM0.71m | 2:35PM0.87m | 2:44AM0.66m | 3:35PM0.84m | 3:48AM0.62m | 4:34PM0.84m | 4:50AM0.62m | 5:29PM0.84m | 5:46AM0.63m | 6:20PM0.87m | 6:36AM0.66m | 7:04PM0.89m | ||||||||
Low Tide | 8:13PM0.18m | 8:00AM0.14m | 9:16PM0.21m | 8:51AM0.18m | 10:16PM0.22m | 9:47AM0.20m | 11:12PM0.22m | 10:41AM0.20m | 00:03AM0.20m | 11:33AM0.19m | 00:49AM0.18m | 12:20PM0.17m | 1:30AM0.14m | ||||||||
 | |  |  |  |  |  |  | | | | | | | | | | | | | | |
 | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — |
 | — | 8:14 | — | — | 8:13 | — | — | 8:12 | — | — | 8:12 | — | — | 8:10 | — | — | 8:09 | — | — | 8:08 | — |
mm | — | — | — | — | 1 | 21 | — | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 21 | 21 | 22 | 23 | 23 | 23 | 24 | 20 | 23 | 24 | 20 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 21 |
Feels °C | 20 | 18 | 18 | 19 | 20 | 22 | 23 | 22 | 24 | 15 | 19 | 20 | 19 | 19 | 18 | 21 | 19 | 18 | 20 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 7 | SE 8 | SSW 7 | SE 11 | S 11 | — | — | S 10 | S 10 | S 9 | S 9 | SSW 8 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | ESE 7 | ESE 7 | SE 7 |
| kJ | 96 | 71 | 3 | 37 | 5 | 2 | — | — | 1614 | 1229 | 575 | 339 | 113 | 99 | 96 | 75 | 73 | 93 | 83 | 93 | 79 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | — | — | — | — | — | — | SE 8 | SE 8 | SE 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SW 6 | S 6 | S 5 | — |
| kJ | 6 | 6 | 6 | 6 | — | — | — | — | — | — | 82 | 84 | 86 | 57 | 19 | 9 | 4 | 1 | 1 | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | SE 8 | SE 12 | — | — | — | — | — | — | — | — | — | — | — | — | S 6 | — | — | — | — | — |
| kJ | — | 3 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | S 7 | SSE 4 | S 6 | S 7 | SSW 9 | SSW 8 | — | N 3 | — | NW 3 | NNE 3 | — | — | — | — | — | — | — | — |
| kJ | — | — | 66 | 16 | 91 | 250 | 795 | 974 | — | 6 | — | 2 | 1 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 702 | 249 | 1148 | 1148 | 24 | 24 | 24 | 24 | 25 | 24 | 0 | 0 | 24 | 24 | 24 | 844 | 24 | 115 | 1411 | 24 |
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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