Surf Forecasts:
Block Island surf forecast from 1 Sep 2026:
- Most powerful swell: Thursday 3 Sep, 2AM (local time) - 5ft (1.5m), 7s period, ESE swell with 205 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 1.5m 7s and forecast to arrive on Thursday (Sep 03) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Sep 05) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 3rd Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. We’ve got a rough stretch ahead for Block Island. Honestly, for the first week and a half, it’s looking like a bust. The surf is tiny, the wind is mostly junk, and the quality is just not there. We’re looking at a solid 11-day gap of nothing worth paddling out for, so don't even bother waxing up until the 12th of September.
The only real glimmer of hope comes on Saturday the 12th of September. That morning, we’ll see a pulse of 6ft swell from the SSW, with a period of 8 seconds. The combined energy will be a moderate 465 (moderate), so there’s some push behind it. The real kicker is the wind: a gentle offshore from the NNW, keeping things clean. Afternoon looks okay too, with 5ft SSW swell under a moderate offshore. It’s not a monster, but after all that nothing, it’s the best on offer.
The water temp is about 70°, which is about average for the time of year, so no surprises there.
Don’t get too excited about the days after that. The 13th and 14th have some size but the wind is messy again. The 15th and 16th are clean but tiny.
So, save your energy for that Saturday. It’s the only show in town.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Thu night. Warm (max 23°C on Thu afternoon, min 19°C on Tue night). Winds decreasing (fresh winds from the E on Tue night, light winds from the NNE by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Fri afternoon, min 16°C on Sun morning). Winds increasing (calm on Sat afternoon, fresh winds from the NE by Sat night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | SE 7 | SE 8 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 6 | SE 6 | SE 8 | SE 8 | SW 4 | SSW 6 | SSW 6 | E 7 | SE 9 | E 8 | SE 9 | SE 9 | SE 9 | SE 8 | SW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12 | 18 | 126 | 182 | 146 | 205 | 69 | 37 | 24 | 23 | 16 | 31 | 22 | 9 | 12 | 11 | 13 | 13 | 12 | 11 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | off | cross-off | cross | off | off | cross-on | cross-off | cross-off | cross-on | off | cross-on | cross-on | cross |
High Tide | 11:05AM1.00m | 11:30PM0.83m | 11:52AM0.99m | 00:21AM0.77m | 12:48PM0.97m | 1:21AM0.73m | 1:55PM0.95m | 2:32AM0.71m | 3:13PM0.94m | 3:50AM0.73m | 4:30PM0.96m | 5:02AM0.80m | 5:35PM0.99m | ||||||||
Low Tide | 5:25PM0.09m | 5:08AM0.05m | 6:26PM0.13m | 5:56AM0.08m | 7:52PM0.16m | 6:55AM0.10m | 9:21PM0.17m | 8:08AM0.12m | 10:31PM0.14m | 9:43AM0.11m | 11:29PM0.10m | 11:08AM0.07m | 00:20AM0.05m | ||||||||
 |  |  |  |  |  | | |  |  | |  | | |  | | | | | | | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:08 | — |
mm | 1 | 1 | 7 | — | — | 2 | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 21 | 19 | 20 | 21 | 22 | 23 | 23 | 22 | 24 | 24 | 22 | 23 | 22 | 17 | 20 | 19 | 19 | 20 | 21 |
Feels °C | 22 | 23 | 23 | 16 | 17 | 21 | 23 | 23 | 25 | 24 | 23 | 23 | 19 | 23 | 21 | 12 | 17 | 16 | 18 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 8 | SE 12 | SE 11 | SE 10 | ESE 7 | ESE 6 | SE 6 | SW 4 | SSW 5 | ESE 7 | SSW 6 | SSW 6 | SSW 6 | E 7 | SSW 6 | SSW 6 | SE 9 | SE 9 | SE 8 | SSE 9 |
| kJ | 12 | 17 | 71 | 94 | 79 | 205 | 69 | 37 | 7 | 23 | 15 | 31 | 22 | 7 | 9 | 8 | 3 | 13 | 12 | 11 | 7 |
Swell 2 Height (m) Direction Period (s) | SE 14 | SSE 13 | — | — | SSW 5 | SSW 5 | SE 9 | SE 9 | SE 8 | ESE 7 | SE 8 | SE 8 | E 8 | E 7 | SSW 5 | E 8 | E 8 | ENE 9 | E 9 | E 8 | E 9 |
| kJ | 8 | 18 | — | — | 2 | 2 | 29 | 27 | 24 | 15 | 11 | 10 | 10 | 9 | 3 | 11 | 4 | 7 | 6 | 5 | 7 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | — | — | — | — | SSW 5 | ENE 5 | SE 6 | SE 8 | S 8 | E 6 | SE 8 | ESE 8 | SE 9 | SSE 9 | SE 9 | SSW 5 | N 3 | E 10 | — |
| kJ | 4 | 4 | — | — | — | — | 3 | 5 | 8 | 23 | 1 | 7 | 10 | 6 | 12 | 8 | 13 | 3 | 1 | 2 | — |
Wind waves Height (m) Direction Period (s) | S 4 | S 3 | ESE 6 | ESE 6 | ESE 6 | — | — | SSW 5 | — | NW 3 | SW 4 | NNW 4 | NNW 3 | WSW 3 | NNE 3 | N 4 | — | NNW 3 | — | SW 2 | SW 4 |
| kJ | 1 | 1 | 126 | 182 | 146 | — | — | 2 | — | 1 | 16 | 11 | 5 | 3 | 3 | 10 | — | 2 | — | 1 | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 702 | 1805 | 117 | 605 | 1805 | 24 | 24 | 152 | 49 | 24 | 634 | 85 | 204 | 648 | 648 | 691 | 648 | 131 | 159 | 1156 | 642 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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