Surf Forecasts:
Block Island surf forecast from 18 Jul 2026:
- Best quality surf: Thursday 23 Jul, 11PM (local time) - 3ft (0.9m), 8s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 22 Jul, 5PM (local time) - 10ft (3.0m), 9s period, S swell with 1,469 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 8PM (local time) - 4ft (1.2m), 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 (Jul 19) at 8PM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.1m and 12s. 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 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Jul 20) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 19th Jul) | 4ft (1.2m) 7s |
| Best Surf | 11PM (Thu 23rd Jul) | 3ft (0.9m) 8s |
| Most Powerful | 5PM (Wed 22nd Jul) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, Rusty here, letting you know how things are shaping up for Block Island. It’s a bit of a flat spell to kick things off, with the next solid window worth paddling out for being about a week away.
We’ve got a stretch of poor conditions from now through to the 18th and into the 19th, but keep an eye on Sunday morning, July 19th. That’s where things get interesting. We’ll see a solid 5 ft swell from the SW with a period around 7 seconds. The wind is a clean NW offshore at 12 mph, so faces should be clean. The combined wave energy is moderate (268), so there’s decent push. It’s a rare break for Block Island, so when it’s on, it’s worth making the call. Water temps are sitting at 68°F, pretty average for this time of year. Just a heads up – it's an exposed point that can get crowded, so expect company.
From there, things fall off again quickly. Monday morning, July 20th looks glassy with a 3 ft swell from the SSW and a period of 8 seconds, but the energy is weak (111) and there’s just not enough push. After that, we’re into a long quiet stretch. The next flicker of hope arrives Wednesday morning, July 22nd, when a 8 ft S swell rolls in with a long 9-second period and heavy energy (915), but the cross-onshore wind is strong at 19 mph. That same day, the afternoon bumps to 10 ft from the SSW (2503 energy), but the wind picks up to 22 mph from the SW, making it a messy, lumpy mess – honestly, that’s more for the kite crowd.
Thursday morning, July 23rd is clean again: 5 ft from the SSW at 9 seconds, with cross-offshore wind from the WNW at 9 mph. Moderate energy (388) and good conditions, but the swell is backing down.
After that, the rest of the month into early August looks pretty flat and wind-affected. There’s a brief mention of Tuesday morning, July 28th with a 6 ft SSW swell and 7-second period pushing moderate energy (587), but the wind is cross-onshore again, so it’s marginal at best.
So to sum it up: if you want a wave, your best bet is Sunday morning, July 19th – clean, moderate swell, offshore wind, and a rare break that could deliver. After that, it’s mostly a waiting game with small windows of hope. Stay tuned, forecasts can change.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Sat afternoon. Warm (max 26°C on Sun afternoon, min 19°C on Sat afternoon). Winds decreasing (fresh winds from the SW on Sat night, light winds from the SW by Mon morning). | Days 5-7 Weather SummaryModerate rain (total 18mm), heaviest on Tue night. Warm (max 23°C on Wed afternoon, min 18°C on Wed night). Winds increasing (light winds from the S on Mon night, strong winds from the S by Tue night). | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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 4 | S 4 | SW 6 | SSW 8 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | S 8 | S 7 | S 7 | SSE 6 | SSW 7 | S 9 | S 9 | SSW 9 | SSW 8 | SSW 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 17 | 17 | 30 | 237 | 327 | 207 | 86 | 104 | 96 | 93 | 112 | 109 | 137 | 408 | 1469 | 656 | 329 | 180 | 87 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 11:11PM0.97m | 11:49AM0.98m | 00:00AM0.88m | 12:42PM0.95m | 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 | ||||||
Low Tide | 5:43AM-0.02m | 6:08PM0.07m | 6:28AM0.03m | 7:10PM0.13m | 7:13AM0.09m | 8:13PM0.18m | 8:00AM0.14m | 9:16PM0.21m | 8:51AM0.18m | 10:16PM0.22m | 9:47AM0.20m | 11:12PM0.22m | |||||||
 |  |  |  | | |  | | | |  | |  |  | | | | | | |
 | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — |
 | 8:15 | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:13 | — | — | 8:12 | — | — | 8:12 | — |
mm | — | — | 11 | 9 | — | — | — | — | — | — | — | — | 14 | 4 | — | — | — | — | — |
Temp °C | 25 | 23 | 21 | 22 | 23 | 26 | 25 | 21 | 23 | 22 | 21 | 22 | 22 | 22 | 23 | 23 | 19 | 22 | 22 |
Feels °C | 21 | 22 | 18 | 21 | 20 | 22 | 21 | 19 | 18 | 18 | 20 | 21 | 20 | 20 | 22 | 21 | 16 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 13 | SE 13 | SSW 8 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | S 8 | SE 12 | SE 11 | — | SE 7 | S 9 | S 9 | SSW 9 | SSW 8 | SE 7 |
| kJ | 3 | 3 | 7 | 7 | 327 | 207 | 86 | 104 | 96 | 93 | 6 | 5 | — | 44 | 1263 | 656 | 329 | 180 | 73 |
Swell 2 Height (m) Direction Period (s) | SE 14 | SE 13 | — | SE 13 | SE 13 | SE 12 | SE 8 | NNE 3 | SE 8 | SE 8 | SE 12 | SE 11 | — | — | — | — | SE 8 | SE 8 | SSW 8 |
| kJ | 8 | 7 | — | 7 | 7 | 6 | 2 | 1 | 3 | 3 | 6 | 5 | — | — | — | — | 71 | 88 | 87 |
Swell 3 Height (m) Direction Period (s) | — | E 8 | E 8 | — | — | — | SE 12 | SE 12 | SE 12 | SE 12 | — | E 8 | — | — | — | — | N 4 | — | — |
| kJ | — | 1 | 1 | — | — | — | 6 | 6 | 6 | 6 | — | 1 | — | — | — | — | 5 | — | — |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 4 | S 4 | SW 6 | NW 3 | — | N 3 | NNW 3 | — | — | S 7 | S 7 | SSE 6 | SSW 7 | S 9 | NW 3 | — | SW 3 | — |
| kJ | 17 | 17 | 30 | 237 | 4 | — | 7 | 1 | — | — | 112 | 109 | 137 | 408 | 1469 | 9 | — | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 634 | 642 | 269 | 340 | 24 | 24 | 24 | 24 | 26 | 26 | 1541 | 2583 | 1148 | 24 | 133 | 24 | 24 | 25 | 0 |
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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