
Surf Forecasts:
Block Island surf forecast from 21 Jul 2026:
- Best quality surf: Wednesday 22 Jul, 11PM (local time) - 8ft (2.5m), 9s period, SSW swell with offshore winds.
- Most powerful swell: Tuesday 28 Jul, 5AM (local time) - 10ft (3.0m), 8s period, SSW swell with 1,118 kJ wave energy.
- Next surfable swell (1★+): Wednesday 22 Jul, 11PM (local time) - 8ft (2.5m), 9s 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 Wednesday (Jul 22) at 11PM. The primary swell is predicted to be 2.5m and 9s period with a secondary swell of 2.3m and 9s. 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 8s and forecast to arrive on Tuesday (Jul 28) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Saturday (Jul 25) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 22nd Jul) | 8ft (2.5m) 9s |
| Best Surf | 11PM (Wed 22nd Jul) | 8ft (2.5m) 9s |
| Most Powerful | 5AM (Tue 28th Jul) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's take a look at what's on offer for Block Island.
First up, the water temperature is running about 19°, which is a bit colder than we'd expect for this time of year, so don't be fooled by a hot day – you'll want a decent spring suit.
Alright, let's be straight with you. The next few days are a write-off. We've got a messy, lumpy, wind-whipped ocean from Tuesday afternoon through to the end of July. The wind is just constantly on it or cross-onshore, and the swell is either too short-period or just straight-up ugly. There's a moment on Thursday morning, July 23rd, where the wind goes light and cross-offshore, and the swell is a clean 5 ft from the south, but it's scored as marginal. It's a maybe, but I wouldn't bet the house on it.
The real story here is a long wait. We're looking at a gap of several days with nothing worth paddling out for. The only flicker of hope comes on Tuesday the 28th of July. The afternoon sees a 7 ft south swell with a 9-second period, and the wind swings to a cross-offshore. The energy is moderate (603), and the conditions are clean. That's your first real window, but it's still only a 2 out of 10, and the morning before it is completely blown out with a near gale. It's a gamble.
The standout in this whole 16-day window, by a long shot, is Wednesday morning, July 29th. We've got a 4 ft south swell (7-second period), but the wind is light and cross-offshore from the WNW. The conditions are clean, and the energy is moderate (226). For a spot that rarely breaks, this is a golden moment. Block Island is a point break, and it's exposed to the swell, so when it gets that clean, light wind, it can be magic. Be aware though, it's a spot that rarely breaks, so this is a special treat. The downside is that it's a slow, inconsistent wave, so don't expect a packed lineup, but crowds are often around here.
After that, it's back to the grind. A few more days of onshore wind and poor surf. There's another chance on Saturday morning, August 1st, with a clean 5 ft south swell and a light cross-offshore breeze from the NE. The energy is moderate (316). But by afternoon, the wind turns onshore again.
The last week of the forecast is a total desert. Swell drops to nothing, and the wind is either onshore or cross. It's a dead zone.
So, bottom line: the best on offer is that Wednesday morning, July 29th. It's a rare, clean window at a rarely-breaking point. The Thursday morning on the 23rd is a distant second, but it's a gamble. For the rest, you're better off waiting for the next forecast.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Tue afternoon. Warm (max 26°C on Wed night, min 18°C on Wed night). Winds decreasing (strong winds from the SW on Tue night, calm by Thu night). | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Sat afternoon, min 16°C on Sat night). Winds decreasing (fresh winds from the NE on Sat morning, calm by Sun morning). | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
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) | S 6 | SSW 7 | SSW 8 | SSW 9 | S 9 | S 8 | SSW 8 | SSW 8 | SSW 8 | ESE 6 | ESE 6 | E 6 | E 6 | SE 7 | SE 7 | SE 7 | SE 7 | SW 5 | SSW 5 | SW 6 |
Wave Graph | ||||||||||||||||||||
245 | 268 | 671 | 1015 | 699 | 347 | 197 | 133 | 58 | 68 | 114 | 139 | 156 | 59 | 79 | 65 | 56 | 49 | 97 | 52 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | off | cross-off | on | glassy | cross | cross-on | cross-off | cross | cross | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 7:22AM0.70m | 7:44PM0.91m | |||||||
Low Tide | 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 | 1:04PM0.14m | 2:08AM0.11m | |||||||
— | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | |
8:13 | — | — | 8:12 | — | — | 8:12 | — | — | 8:10 | — | — | 8:09 | — | — | 8:08 | — | — | 8:07 | — | |
mm | 10 | 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 22 | 24 | 26 | 20 | 22 | 20 | 20 | 21 | 20 | 20 | 22 | 21 | 18 | 21 | 21 | 22 | 22 | 22 |
Feels °C | 19 | 21 | 18 | 22 | 25 | 17 | 20 | 18 | 18 | 18 | 17 | 16 | 17 | 17 | 17 | 18 | 18 | 21 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 8 | — | — | S 9 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | ESE 6 | SSW 6 | SE 8 | SE 7 | SE 7 | SE 7 | SE 7 | ESE 7 | SE 8 | SW 6 |
5 | 16 | — | — | 699 | 347 | 197 | 133 | 58 | 43 | 114 | 14 | 21 | 59 | 79 | 65 | 56 | 37 | 46 | 52 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | SE 7 | SE 7 | SE 8 | S 7 | SSW 6 | SSW 6 | S 7 | SSW 6 | SSW 6 | — | — | SSE 6 | SSE 7 |
— | — | — | — | — | — | 1 | 59 | 44 | 24 | 25 | 14 | 8 | 24 | 7 | 3 | — | — | 30 | 36 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | S 8 | — | SSW 6 | S 7 | — | — | — | SE 8 |
— | — | — | — | — | — | — | — | — | — | — | — | 5 | — | 7 | 1 | — | — | — | 32 | |
Wind waves Height (m) Direction Period (s) | S 6 | SSW 7 | SSW 8 | SSW 9 | NW 3 | N 3 | SE 7 | NE 4 | NE 2 | ESE 6 | — | E 6 | E 6 | ENE 5 | NE 4 | — | SSW 3 | SW 5 | SSW 5 | — |
245 | 268 | 671 | 1015 | 2 | 3 | 59 | 1 | 1 | 68 | — | 139 | 156 | 33 | 7 | — | 5 | 49 | 97 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1148 | 415 | 217 | 24 | 0 | 24 | 24 | 0 | 24 | 702 | 24 | 25 | 26 | 24 | 24 | 1411 | 161 | 634 | 1067 | 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.










