Surf Forecasts:
Block Island surf forecast from 30 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 2PM (local time) - 5ft (1.6m), 6s period, SE swell with 167 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 1.6m 6s and forecast to arrive on Wednesday (Sep 02) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Sep 04) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Wed 2nd Sep) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, Rusty here again, giving you the same story in feet and miles.
Looking at Block Island, it’s a tough stretch. This point break rarely breaks as it is, and the next 16 days aren’t doing it any favors. We’re looking at a long, quiet period with nothing that really gets the stoke going. The first even slightly interesting window isn’t until the morning of Wednesday, September 9th.
There’s a big gap of flat or messy conditions from the start through the first week. The combined swell energy stays weak, mostly under 100, through the end of August. The only energy spike is on Wednesday, September 2nd, with a reading of 316, but that’s a 6ft short-period (6 seconds) wind swell getting hammered by 25 mph cross-onshore rain. That’s a total mess – more for kite surfing than paddle surfing.
Thursday, September 3rd, brings a 4ft swell from the SE with moderate cross-shore wind, but the energy is moderate (144) and the conditions are choppy.
Things clean up from Friday, September 4th, through Tuesday, September 8th, with offshore and cross-offshore winds. But the swell is tiny – 1ft to 2ft – and the energy is weak. It’s clean enough for a longboard, but there’s no power.
The closest thing to a standout is the morning of Wednesday, September 9th. We see some size at 5ft from the south, with a 7-second period and a combined energy of 259. The wind is light and onshore, and the conditions are just marginal. For Block Island, that’s the best we get, and it’s still not great.
After that, it fades back into small, lumpy conditions through to Monday, September 14th.
The water temp on Sunday, August 30th, was about 70°, which is normal for the season. For a spot that’s rarely breaking, this kind of quiet run isn’t a total shock, but it’s still a letdown. The board stays on the rack for now.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sun night. Warm (max 23°C on Sun night, min 19°C on Mon night). Winds decreasing (fresh winds from the SW on Sun afternoon, light winds from the E by Mon night). | Days 5-7 Weather SummaryHeavy rain (total 30mm), heaviest during Wed night. Warm (max 24°C on Thu night, min 17°C on Sat morning). Winds decreasing (strong winds from the SSW on Wed night, light winds from the WNW by Thu night). | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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) | SW 4 | SSW 5 | SE 8 | SE 8 | SE 8 | SE 7 | ESE 4 | ESE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | SW 6 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 29 | 32 | 23 | 17 | 14 | 12 | 28 | 134 | 118 | 141 | 103 | 80 | 62 | 34 | 63 | 78 | 54 | 17 | 9 | 5 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 10:03PM0.92m | 10:23AM0.99m | 10:44PM0.88m | 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 | |||||||
Low Tide | 3:56PM0.05m | 3:52AM0.01m | 4:38PM0.06m | 4:27AM0.03m | 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 | |||||||
 |  | |  |  |  | |  | |  |  | |  | | |  |  | | | | |
 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — |
 | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — |
mm | — | 3 | — | — | 3 | 1 | 1 | — | — | 8 | 16 | — | 5 | 1 | — | — | — | — | — | — |
Temp °C | 22 | 23 | 20 | 21 | 22 | 20 | 20 | 21 | 21 | 20 | 23 | 23 | 23 | 24 | 22 | 24 | 22 | 19 | 20 | 19 |
Feels °C | 19 | 23 | 20 | 21 | 22 | 21 | 20 | 18 | 18 | 18 | 23 | 23 | 24 | 25 | 18 | 20 | 18 | 14 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SSW 5 | SSW 5 | SSW 5 | SE 8 | SE 7 | SE 13 | SE 12 | SE 11 | SE 10 | SE 9 | SE 6 | SE 6 | SSW 5 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | ENE 4 | SE 9 |
| kJ | 25 | 32 | 16 | 9 | 14 | 12 | 7 | 71 | 94 | 79 | 53 | 80 | 62 | 24 | 63 | 78 | 54 | 17 | 8 | 3 |
Swell 2 Height (m) Direction Period (s) | — | SE 8 | SE 8 | SE 8 | SSW 5 | SSW 4 | SW 4 | — | SW 5 | — | — | SE 9 | SE 9 | SE 6 | ESE 8 | SE 8 | SE 8 | ESE 8 | ESE 8 | SSW 6 |
| kJ | — | 18 | 23 | 17 | 4 | 2 | 1 | — | 1 | — | — | 29 | 27 | 34 | 44 | 31 | 16 | 6 | 6 | 3 |
Swell 3 Height (m) Direction Period (s) | E 9 | — | — | — | — | SE 14 | SSE 13 | — | — | — | — | — | S 5 | SE 8 | S 8 | S 8 | — | — | — | E 8 |
| kJ | 2 | — | — | — | — | 8 | 18 | — | — | — | — | — | 7 | 24 | 1 | 1 | — | — | — | 5 |
Wind waves Height (m) Direction Period (s) | SW 4 | — | — | — | — | E 3 | ESE 4 | ESE 6 | SE 6 | SE 6 | SE 6 | SW 4 | SW 4 | NW 3 | WNW 4 | W 4 | NW 4 | NNE 4 | SW 6 | N 4 |
| kJ | 29 | — | — | — | — | 1 | 28 | 134 | 118 | 141 | 103 | 16 | 18 | 9 | 31 | 21 | 21 | 17 | 9 | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1814 | 49 | 770 | 642 | 702 | 702 | 1805 | 415 | 482 | 1805 | 251 | 26 | 24 | 24 | 25 | 25 | 634 | 1067 | 2852 | 2371 |
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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