Surf Forecasts:
Block Island surf forecast from 15 Jul 2026:
- Most powerful swell: Tuesday 21 Jul, 8PM (local time) - 7ft (2.1m), 8s period, S swell with 551 kJ wave energy.
Best Forecast Surf Conditions for Block Island this week:
The most powerful waves expected at Block Island in the next 16 days are 2.1m 8s and forecast to arrive on Tuesday (Jul 21) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Jul 19) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Tue 21st Jul) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it for the Block Island area.
We’ve got a long 16-day window ahead, but honestly, it’s a tough watch for most of it. The first real surf of note doesn’t show up until the morning of Wednesday the 22nd, and even then it’s just a *marginal* call. Before that, we’re looking at a solid week of nearly nothing worth paddling out for. The winds are all over the place, mostly cross-on or strong, and the swell is either tiny, short-period junk, or blown out before it even gets a chance.
The standout window, and I mean the only real standout, looks like Thursday morning, the 23rd of July. The wave energy is moderate (225), but the real story is the wind. We’re looking at a glassy morning with a light breeze out of the NW, which is offshore for Block Island. That’s clean surf. The swell is a modest 3 ft from the south, with a period of 8 seconds. It’s not going to be a giant, but it’ll be rideable and, most importantly, *clean*. The water is sitting around 67°, which is a bit colder than normal for this time of year, so a decent spring suit is still the call.
Crowds are often an issue at Block Island, so with the only decent conditions in the whole forecast, expect it to be busy. The break is a point, and it’s classified as rarely breaks, so when it does, everyone knows about it. The set-up is exposed to the south swell, and the optimum direction is from the SE, so this south swell is a little off the ideal angle, but with those clean conditions, you take what you can get.
For the rest of the window, it’s a write-off. A few sessions in the second week, like the 25th or 29th, might have a glassy moment, but the swell is tiny and short. The clean wind on the 29th is a tease, but the swell is a pathetic 2 ft with an 8-second period; it’s a lake out there.
If you’re looking for a paddle, set your alarm for the morning of the 23rd. If the wind holds, that’s your one chance.
Rusty.
Short Range ForecastMostly dry. Warm (max 32°C on Wed afternoon, min 20°C on Thu night). Winds decreasing (strong winds from the SW on Tue night, calm by Wed night). | Days 5-7 Weather SummaryHeavy rain (total 64mm), heaviest during Sun afternoon. Warm (max 25°C on Fri afternoon, min 20°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tue 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 6 | SW 7 | SW 7 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | S 5 | SSE 5 | S 6 | S 7 | S 8 | S 9 | S 9 | S 9 | S 8 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 277 | 524 | 176 | 136 | 63 | 38 | 46 | 27 | 28 | 36 | 40 | 19 | 44 | 78 | 83 | 317 | 348 | 351 | 343 | 258 | 334 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | off | cross-on | cross-on | cross | cross | cross-on | cross-on | glassy | cross | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | 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 | ||||||||
Low Tide | 2:05PM-0.09m | 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 | — | — | — | — | — | — | — | — | — | — | 1 | 24 | 13 | — | 3 | 20 | — | 3 | — | — | — |
Temp °C | 23 | 25 | 28 | 32 | 31 | 26 | 28 | 28 | 22 | 25 | 24 | 20 | 20 | 21 | 21 | 20 | 20 | 20 | 23 | 23 | 23 |
Feels °C | 19 | 23 | 27 | 29 | 29 | 25 | 24 | 25 | 22 | 21 | 22 | 21 | 22 | 24 | 22 | 20 | 21 | 20 | 24 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | ESE 9 | SSW 6 | SSW 6 | SE 9 | SSW 6 | SSW 6 | SE 8 | SE 8 | S 5 | SE 8 | S 6 | S 7 | S 8 | S 9 | S 9 | S 9 | SE 12 | — |
| kJ | 13 | 13 | 12 | 8 | 63 | 38 | 3 | 27 | 28 | 3 | 3 | 19 | 3 | 78 | 83 | 317 | 348 | 351 | 343 | 6 | — |
Swell 2 Height (m) Direction Period (s) | E 7 | — | S 17 | S 17 | ESE 9 | SE 8 | S 15 | SE 9 | E 4 | — | SE 14 | SE 8 | SE 13 | SE 8 | SW 7 | SE 12 | SE 12 | SE 12 | SE 12 | — | — |
| kJ | 1 | — | 6 | 5 | 8 | 3 | 4 | 3 | 4 | — | 8 | 3 | 7 | 2 | 35 | 6 | 6 | 5 | 6 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 17 | S 15 | — | SE 15 | SE 8 | SE 14 | E 9 | SE 13 | E 8 | SE 13 | NE 4 | SE 12 | SE 12 | SE 12 | — | — | — |
| kJ | — | — | — | — | 5 | 4 | — | 9 | 3 | 8 | 1 | 7 | 1 | 7 | 2 | 6 | 6 | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 7 | SW 7 | SW 6 | NNW 2 | — | SSW 6 | E 3 | — | SSW 6 | SSW 6 | — | SSE 5 | N 3 | — | — | — | — | — | S 8 | S 8 |
| kJ | 277 | 524 | 176 | 136 | 1 | — | 46 | 5 | — | 36 | 40 | — | 44 | 2 | — | — | — | — | — | 258 | 334 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1313 | 209 | 24 | 24 | 24 | 767 | 256 | 878 | 642 | 2500 | 767 | 308 | 25 | 24 | 24 | 25 | 25 | 141 | 24 | 24 | 228 |
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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