Surf Forecasts:
Block Island surf forecast from 20 Jul 2026:
- Best quality surf: Thursday 23 Jul, 8AM (local time) - 5.5ft (1.7m), 9s period, S swell with offshore winds.
- Most powerful swell: Wednesday 22 Jul, 11AM (local time) - 10ft (3.0m), 9s period, SSW swell with 1,288 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 8AM (local time) - 5.5ft (1.7m), 9s 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 8AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.8m and 7s. 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 3.0m 9s and forecast to arrive on Wednesday (Jul 22) at 11AM. 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 Thursday (Jul 23) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 23rd Jul) | 5.5ft (1.7m) 9s |
| Best Surf | 8AM (Thu 23rd Jul) | 5.5ft (1.7m) 9s |
| Most Powerful | 11AM (Wed 22nd Jul) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, let me break this down for you. Block Island is a point break that rarely breaks, so when it does, you gotta pay attention. Over the next 16 days, there’s a long dry spell at the start – nothing worth paddling out for on Monday or Tuesday. Then on Wednesday the 22nd, a big pulse of 10 feet swell from the SSW rolls in, but it’s coming with a cross-shore wind and lumpy conditions. That’s a lot of water for a spot that’s normally quiet, and with the wind on it, it’s more of a novelty than a clean session. The energy is strong (1288), but it’s messy.
The real standout comes on Thursday the 23rd. Thursday morning the wind swings offshore from the NNW at 12 mph, the swell drops to a very manageable 5 feet from the S, and the period is 9 seconds. The wave energy is moderate (345), and the wind is moderate offshore, cleaning things up nicely. For a break that rarely works, this is a golden window – clean, head-high-plus waves, and the point should handle that S swell well. It’s also an intermediate-friendly size, so if you’re comfortable, you’re in for a treat. Just be aware that crowds are often a thing here, so expect company.
Friday the 24th morning is another look: glassy conditions with an ESE breeze at 3 mph, smaller 3 feet from the SSW, and a period of 8 seconds. Wave energy is moderate (210). It’s tiny but clean, and if you’ve got a log or a fish, that glassy morning could be a fun little session. Not as much power as Thursday, but the lack of wind makes it tempting.
After Friday, the surf drops off fast. From Saturday through the end of the month and into early August, it’s mostly poor – small, choppy, onshore winds, and energy in the weak to moderate range. There’s a brief spike on the 2nd of August with 5 feet swell from the SSW, but it’s onshore and choppy, so not worth getting excited about. The window is short, but Thursday morning is the clear winner. If you can only go once, make it the 23rd.
Rusty
Short Range ForecastHeavy rain (total 35mm), heaviest during Tue night. Warm (max 25°C on Wed afternoon, min 19°C on Sun night). Winds increasing (light winds from the N on Sun night, fresh winds from the SSE by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed night, min 16°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||
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 8 | SSW 7 | SSW 7 | SSW 7 | SSE 6 | S 7 | SSW 9 | SSW 9 | S 10 | S 9 | SSW 9 | S 8 | SSW 8 | SSW 8 | SE 8 | SE 7 | SE 7 | SE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 123 | 96 | 71 | 54 | 27 | 109 | 199 | 1288 | 1094 | 963 | 290 | 270 | 165 | 119 | 81 | 67 | 64 | 75 | 71 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-on | on | on | cross-on | cross | cross-on | off | off | cross-on | on | glassy | on | cross-off | cross | cross-on | cross-off |
High Tide | 00:50AM0.79m | 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 | |||||||
Low Tide | 7:13AM0.09m | 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 | |||||||
 | | |  |  |  |  |  | |  | | | | | | | | | | |
 | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | 8:15 | — | 8:14 | — | — | 8:13 | — | — | 8:12 | — | — | 8:12 | — | — | 8:10 | — | — | 8:09 | — |
mm | — | — | — | — | — | 3 | 32 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 20 | 22 | 21 | 21 | 22 | 22 | 23 | 25 | 26 | 20 | 21 | 22 | 19 | 20 | 20 | 20 | 21 | 20 |
Feels °C | 21 | 18 | 18 | 17 | 18 | 19 | 20 | 22 | 24 | 26 | 16 | 18 | 20 | 20 | 19 | 18 | 18 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SE 11 | S 7 | — | — | S 10 | S 9 | SSW 9 | S 8 | ESE 7 | SSW 8 | SE 8 | SE 7 | SE 7 | SE 7 |
| kJ | 123 | 96 | 71 | 54 | 27 | 5 | 199 | — | — | 963 | 290 | 270 | 165 | 91 | 81 | 67 | 64 | 75 | 71 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 8 | SE 12 | — | SSW 7 | — | — | — | SE 8 | SE 8 | SE 7 | SSW 8 | SE 8 | SSW 7 | SSW 7 | SSW 6 | S 7 |
| kJ | 6 | 6 | 6 | 3 | 5 | — | 81 | — | — | — | 55 | 82 | 71 | 119 | 75 | 57 | 26 | 14 | 8 |
Swell 3 Height (m) Direction Period (s) | SE 8 | — | SE 8 | SE 12 | — | — | — | — | — | — | — | NE 4 | — | — | — | E 4 | — | — | SSW 6 |
| kJ | 2 | — | 3 | 5 | — | — | — | — | — | — | — | 3 | — | — | — | 9 | — | — | 8 |
Wind waves Height (m) Direction Period (s) | NW 3 | — | — | S 4 | SSE 4 | SSE 6 | — | SSW 9 | SSW 9 | NNW 3 | NNE 4 | — | — | ENE 4 | E 4 | — | ENE 4 | — | — |
| kJ | 3 | — | — | 10 | 24 | 109 | — | 1288 | 1094 | 10 | 15 | — | — | 13 | 15 | — | 5 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 24 | 24 | 702 | 211 | 1148 | 1148 | 24 | 133 | 24 | 26 | 0 | 24 | 24 | 0 | 24 | 24 | 25 | 844 | 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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