Surf Forecasts:
Block Island surf forecast from 7 Sep 2026:
- Best quality surf: Friday 11 Sep, 2AM (local time) - 4.5ft (1.3m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 7.5ft (2.3m), 7s period, SW swell with 498 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 2AM (local time) - 4.5ft (1.3m), 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 Friday (Sep 11) at 2AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.3m and 10s. 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 2.3m 7s and forecast to arrive on Thursday (Sep 10) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 07) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 11th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 2AM (Fri 11th Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 5AM (Thu 10th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Right then, let’s be straight with you. For the next 16 days, surf around Block Island is looking pretty grim. There’s a real lack of any good, ridable swell. The first recommendation isn’t until September 10th, and even then, it’s a tough one. You’re looking at a blank run of almost nothing for that first stretch.
Let’s get into it. The first bit of any note, Block Island, a point break that rarely breaks – so you know it’s a special place but needs everything to line up. It’s set up for optimum swell from the SE.
On Thursday, September 10th, we see a pulse of swell. The morning brings in about 7 ft of swell from the SW, with a short period of 7 seconds. The combined wave energy jumps to a solid 446 (moderate energy), but the wind is a fresh cross-shore at 22 mph. That’s going to make for a lumpy, cross-choppy mess. It’s not going to be clean or well-shaped. The afternoon is similar, with 7 ft SW swell and the same messy cross-wind. This is sizable stuff, over 5 ft, so it’s edging out of beginner territory for sure.
After that, it drops off quickly. The morning of Friday, September 11th sees cleaner conditions with a light offshore wind from the NNW, but the swell has dropped to just 3 ft from the SSW, with weak energy (79). It’s clean, but the wave height is barely there.
The rest of the forecast is a struggle. We’ve got long stretches of small, weak swell with onshore winds. By Wednesday, September 16th, there’s a bit of a clean slate with a cross-offshore wind, but it’s only 2 ft of short-period SSW swell (40 energy). It’s a grind.
Further out, Saturday, September 19th brings another pulse, with strong onshore winds (28 mph) and a messy 4 ft of southerly swell. That’s a kite-surfing breeze, not a paddle-surfing one. The water temp on the first day was 70°, about average for the time of year, nothing wild.
Honestly, there are no true standouts here. The swell is either too small and weak, or it comes with poor wind and messy conditions. If you’re desperate, that Thursday the 10th has the size, but the quality is non-existent. It’s a rare break for a reason, and this window isn’t kind to it. Forecasts can change, but right now? It’s a long wait.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 18°C on Mon morning). Winds increasing (light winds from the WSW on Mon afternoon, strong winds from the SW by Wed night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu night, min 17°C on Fri morning). Winds decreasing (fresh winds from the WSW on Thu morning, light winds from the NE by Sat morning). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
AM | 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) | E 10 | E 9 | E 9 | E 9 | SSE 9 | SE 9 | SSE 8 | SSW 4 | SW 7 | SW 7 | SW 7 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SE 9 | SE 10 | SE 10 | SE 10 | S 5 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 15 | 15 | 8 | 8 | 12 | 7 | 31 | 414 | 432 | 384 | 178 | 64 | 39 | 26 | 13 | 15 | 19 | 33 | 31 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | off | off | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 5:35PM0.99m | 6:03AM0.88m | 6:31PM1.01m | 6:57AM0.97m | 7:21PM1.02m | 7:46AM1.04m | 8:07PM1.01m | 8:32AM1.08m | 8:50PM0.98m | 9:16AM1.09m | 9:33PM0.93m | 9:59AM1.06m | 10:14PM0.87m | ||||||||
Low Tide | 11:08AM0.07m | 00:20AM0.05m | 12:13PM0.02m | 1:06AM0.01m | 1:09PM-0.02m | 1:47AM-0.02m | 2:00PM-0.03m | 2:25AM-0.03m | 2:47PM-0.03m | 2:59AM-0.02m | 3:32PM-0.01m | 3:29AM0.02m | 4:16PM0.04m | 3:55AM0.06m | |||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | 7:08 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 24 | 24 | 22 | 24 | 22 | 22 | 22 | 23 | 22 | 23 | 24 | 19 | 21 | 21 | 20 | 22 | 22 | 22 | 23 | 23 |
Feels °C | 17 | 22 | 21 | 20 | 21 | 21 | 23 | 20 | 18 | 19 | 20 | 23 | 17 | 17 | 18 | 19 | 20 | 20 | 21 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | SW 4 | SSE 9 | SE 9 | SSE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SE 10 | SE 10 | SE 10 | SE 9 | SSE 5 |
| kJ | 30 | 15 | 15 | 3 | 8 | 12 | 7 | 15 | 12 | 13 | 13 | 178 | 64 | 39 | 26 | 13 | 14 | 15 | 33 | 31 | 13 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 8 | SSE 8 | E 9 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 10 | SSE 6 | SSE 6 | SE 10 | — | — | — | SE 9 |
| kJ | 7 | 7 | 7 | 6 | 6 | 6 | 2 | 2 | 1 | 1 | 1 | 15 | 15 | 14 | 7 | 7 | 14 | — | — | — | 29 |
Swell 3 Height (m) Direction Period (s) | S 5 | S 5 | WSW 4 | SSE 9 | — | S 5 | SE 10 | — | — | — | — | E 8 | — | — | SE 9 | SE 9 | — | — | — | — | SW 5 |
| kJ | 2 | 1 | 1 | 8 | — | 1 | 4 | — | — | — | — | 1 | — | — | 14 | 13 | — | — | — | — | 9 |
Wind waves Height (m) Direction Period (s) | NW 3 | W 3 | NW 2 | — | SW 3 | SW 4 | SSW 3 | SSW 4 | SW 7 | SW 7 | SW 7 | — | NNW 3 | — | — | — | S 6 | S 4 | SSE 5 | S 5 | — |
| kJ | 3 | 1 | 1 | — | 5 | 5 | 3 | 31 | 414 | 432 | 384 | — | 2 | — | — | — | 15 | 19 | 31 | 31 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 49 | 426 | 482 | 769 | 665 | 608 | 1008 | 1084 | 204 | 249 | 0 | 24 | 340 | 49 | 776 | 645 | 217 | 24 | 3329 | 221 |
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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