Surf Forecasts:
Block Island surf forecast from 15 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 11PM (local time) - 6ft (1.8m), 9s period, S swell with offshore winds.
- Most powerful swell: Tuesday 21 Jul, 8PM (local time) - 6ft (1.9m), 9s period, S swell with 529 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 8PM (local time) - 4.5ft (1.4m), 6s period with SW 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 Wednesday (Jul 15) at 8PM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 1.3m and 6s. Another secondary swell of 0.2m and 9s is also forecast. 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 1.9m 9s and forecast to arrive on Tuesday (Jul 21) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Jul 22) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 15th Jul) | 4.5ft (1.4m) 6s |
| Best Surf | 11PM (Tue 21st Jul) | 6ft (1.8m) 9s |
| Most Powerful | 8PM (Tue 21st Jul) | 6ft (1.9m) 9s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's cookin' for Block Island over the next couple of weeks.
To be straight with you, it's a tough outlook. The whole 16-day window is a bit of a struggle. We've got a long stretch of poor surf and onshore winds, with only a couple of fleeting moments that might be worth a paddle. The first few days are a write-off, with small, weak, short-period windswell and messy cross-onshore winds. The swell energy is weak, often below 100 (179), and the waves are just poor.
Things don't really get going until mid-month, and even then it's a battle. The first real standout comes on Monday, July 27th. The morning is showing some promise at Block Island. We've got a 4 ft swell from the SSW, but the real beauty is the wind: it's glassy, dead calm. The combined energy is moderate (217), and the conditions are described as "expect good surf." With a 7-second period, it's short-period windswell, but with that glassy surface, it could be clean and fun for a little session. The direction is a bit off from the optimum SE, but the clean conditions make it the best bet for a wave.
After that, the wind picks up again in the afternoon, and the rest of the week is a mess of strong cross-on and onshore winds. The swell gets bigger, with a 7 ft swell from the S on the morning of Thursday, July 30th, and the energy is strong (593). But the wind is light cross-onshore, the period is a mediocre 9 seconds, and the forecast is "marginal." It's a big, messy swell, and with the wind direction, it's going to be a battle. That's a wave for the experts only, and even then, it's a gamble.
There's no real clean, standout window for the whole period. The best you can hope for is that early morning glass on the 27th. The pickings are slim, and the rest of the time, the wind is going to be your enemy. It's a frustrating forecast for sure.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 31°C on Wed night, min 21°C on Fri morning). Winds decreasing (strong winds from the SW on Tue night, calm by Fri morning). | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sat afternoon. Warm (max 24°C on Fri night, min 17°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 7 | SW 6 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | S 5 | SSE 5 | S 6 | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 7 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 396 | 161 | 193 | 65 | 44 | 67 | 28 | 25 | 25 | 25 | 15 | 11 | 83 | 113 | 100 | 138 | 196 | 224 | 309 | 365 | 488 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | off | cross-on | cross-on | cross | glassy | cross-on | cross | cross-on | on | cross-off | cross-off | cross-on | on | cross-on | on | cross-on | cross | cross |
High Tide | 8:43PM1.14m | 9:10AM0.96m | 9:34PM1.10m | 10:03AM0.99m | 10:23PM1.05m | 10:56AM1.00m | 11:11PM0.97m | 11:49AM0.98m | 00:00AM0.88m | 12:42PM0.95m | 00:50AM0.79m | 1:37PM0.91m | 1:44AM0.71m | 2:35PM0.87m | |||||||
Low Tide | 3:23AM-0.06m | 3:06PM-0.07m | 4:10AM-0.07m | 4:06PM-0.04m | 4:57AM-0.05m | 5:07PM0.01m | 5:43AM-0.02m | 6:08PM0.07m | 6:28AM0.03m | 7:10PM0.13m | 7:13AM0.09m | 8:13PM0.18m | 8:00AM0.14m | ||||||||
 | |  |  | | | | | |  |  |  |  |  | |  | | | | |  | |
 | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — |
 | 8:17 | — | 8:16 | — | — | 8:16 | — | — | 8:15 | — | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:13 |
mm | — | — | — | — | — | — | — | — | — | — | 7 | 11 | 3 | — | — | — | — | — | 1 | — | 1 |
Temp °C | 25 | 27 | 30 | 31 | 26 | 27 | 29 | 22 | 25 | 24 | 20 | 18 | 20 | 21 | 21 | 21 | 20 | 22 | 23 | 23 | 26 |
Feels °C | 23 | 26 | 29 | 29 | 24 | 23 | 27 | 22 | 20 | 20 | 18 | 17 | 22 | 22 | 24 | 22 | 20 | 23 | 24 | 22 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SSW 6 | SSW 6 | SE 9 | SSW 6 | SSW 6 | SE 8 | SE 8 | SE 8 | SE 8 | SE 13 | S 6 | S 8 | S 8 | S 8 | S 8 | E 5 | E 5 | S 8 |
| kJ | 13 | 12 | 12 | 65 | 44 | 3 | 28 | 25 | 3 | 3 | 3 | 3 | 7 | 113 | 100 | 138 | 196 | 224 | 1 | 1 | 488 |
Swell 2 Height (m) Direction Period (s) | — | S 17 | S 17 | ESE 9 | SE 9 | S 15 | NNW 3 | NNE 2 | SE 14 | SE 14 | SE 13 | SE 13 | SE 8 | SE 13 | SW 7 | ENE 4 | E 5 | E 5 | SE 12 | S 12 | E 6 |
| kJ | — | 6 | 5 | 8 | 3 | 4 | 2 | 1 | 8 | 8 | 7 | 7 | 3 | 7 | 47 | 2 | 2 | 2 | 5 | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 17 | S 15 | — | SE 9 | SE 8 | — | E 9 | E 8 | — | — | — | NE 4 | SE 12 | SE 12 | SE 12 | — | — | — |
| kJ | — | — | — | 5 | 4 | — | 3 | 3 | — | 1 | 1 | — | — | — | 2 | 6 | 6 | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 6 | SW 6 | NNW 3 | — | SSW 6 | — | NE 3 | SSW 6 | SSW 6 | SSW 5 | S 5 | SSE 5 | N 3 | — | ESE 2 | SE 3 | — | S 8 | SSW 7 | — |
| kJ | 396 | 161 | 193 | 2 | — | 67 | — | 1 | 25 | 25 | 15 | 11 | 83 | 7 | — | 1 | 5 | — | 309 | 365 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 249 | 24 | 24 | 24 | 24 | 1084 | 634 | 642 | 2500 | 634 | 634 | 219 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 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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