Surf Forecasts:
Block Island surf forecast from 29 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 8AM (local time) - 4.5ft (1.3m), 11s period, SE swell with 377 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 1.3m 11s and forecast to arrive on Wednesday (Sep 02) at 8AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 29) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Wed 2nd Sep) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here, and I’ve gotta be straight with you – it’s a tough stretch ahead for Block Island. This spot is a rare-breakin' point, and the next couple of weeks are mostly about waitin' and hopin'. We’ve got a long dry spell right out of the gate, so don’t bother waxin’ up just yet.
For the next week or so, it’s pretty much a write-off. From Saturday the 29th of August right through to the 6th of September, we’re lookin’ at a big fat zero on the surf front. The swell is tiny, period is short, and energy is pathetic – mostly double-digit numbers like 61 or even down to 24. You’ll see a lot of “poor surf conditions” in the notes, and that’s the truth. Winds are all over the place, but with nothing to push around, it doesn’t matter. The weather will be a mix of clear skies and some light rain, but it’s all just background noise.
Now, there is a flicker of hope. Around Monday the 7th of September, things start to change. We get a pulse of southerly swell pushin’ in. Monday morning brings a clean 6ft swell from the south, with a period of 6 seconds, and light offshore winds out of the northwest. Energy jumps to 229 – that’s moderate, and it feels alive. By Monday afternoon, it cleans up even more: 7ft from the south, 7 seconds, and light cross-offshore winds from the west. Energy hits 424, which is solid. That’s the best on offer for the whole 16 days. Block Island (Rhode Island) is a point break, and with a south swell, it’s in its sweet spot. The water temp is about average for this time of year – no weird anomalies to report.
Tuesday the 8th still has some meat on it. Morning brings 5ft from the south, 8 seconds, with clean cross-offshore winds from the northeast, and energy at 345. But the afternoon gets tricky – onshore winds and marginal tide conditions, so the window is tight. For the rest of the week into the second week, it fades back into mediocrity: smaller swells, choppy winds, and a lot of “poor” labels. There’s a brief spike on the 11th with 6ft and 5ft from the southwest, but the winds are messy and onshore, so it’s not worth getting excited about.
To sum it up: the standout is Monday the 7th of September. If you can get out there in the morning or early afternoon, you’ll find clean 5ft to 7ft south swell with light winds. It’s an intermediate-level spot, and it’s rarely-breaking, so when it does show, it’s a special thing. Crowds are often a factor here, so expect some company. The rest of the month is mostly a waiting game.
Stay patient, keep an eye on the sky, and I’ll catch you next time.
Rusty
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 24°C on Fri night, min 18°C on Fri night). Winds increasing (light winds from the S on Sat afternoon, fresh winds from the SW by Sun night). | Days 5-7 Weather SummaryHeavy rain (total 29mm), heaviest during Wed night. Warm (max 27°C on Thu afternoon, min 21°C on Tue morning). Winds increasing (light winds from the SSE on Tue afternoon, strong winds from the SSW by Wed night). | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 8 | SE 8 | SE 8 | SE 8 | SW 6 | SW 4 | SW 5 | SW 5 | SE 8 | SE 8 | SE 7 | SE 8 | SE 12 | SE 11 | SE 5 | SE 6 | S 6 | S 7 | SSE 7 |
Wave Graph | |||||||||||||||||||
61 | 38 | 31 | 34 | 25 | 25 | 33 | 27 | 23 | 10 | 12 | 16 | 71 | 94 | 117 | 165 | 344 | 233 | 96 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross | cross | cross-on | cross-off | cross-off | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross | cross-off | cross-off |
High Tide | 8:50PM0.94m | 9:14AM0.95m | 9:25PM0.94m | 9:47AM0.98m | 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 | ||||||
Low Tide | 2:55AM0.01m | 3:19PM0.05m | 3:22AM0.00m | 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 | |||||||
— | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
7:25 | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | |
mm | — | — | — | — | — | — | 1 | — | — | — | 1 | — | — | — | 9 | 14 | 5 | — | — |
Temp °C | 24 | 19 | 21 | 21 | 22 | 23 | 23 | 22 | 23 | 22 | 22 | 21 | 22 | 22 | 22 | 23 | 23 | 27 | 26 |
Feels °C | 24 | 16 | 19 | 18 | 20 | 20 | 20 | 22 | 22 | 21 | 22 | 22 | 23 | 19 | 20 | 20 | 20 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SW 5 | SW 5 | SSW 5 | SSW 5 | SE 7 | SE 8 | SE 12 | SE 11 | S 5 | — | SE 9 | S 7 | SSE 7 |
61 | 38 | 31 | 34 | 25 | 25 | 33 | 27 | 9 | 7 | 12 | 16 | 71 | 94 | 1 | — | 3 | 233 | 96 | |
Swell 2 Height (m) Direction Period (s) | SSW 6 | S 7 | S 6 | SSW 6 | S 6 | — | SE 8 | SE 8 | SE 8 | SE 6 | SW 5 | SSW 5 | SW 4 | — | — | — | — | SE 9 | SSW 6 |
11 | 21 | 19 | 12 | 2 | — | 18 | 23 | 23 | 6 | 3 | 2 | 1 | — | — | — | — | 21 | 25 | |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | NE 4 | E 5 | — | E 9 | — | SE 8 | S 7 | SE 8 | SE 10 | SE 10 | — | — | — | — | — | — | SSE 7 |
2 | 2 | 4 | 2 | — | 2 | — | 23 | 1 | 10 | 4 | 4 | — | — | — | — | — | — | 27 | |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNE 4 | — | WSW 2 | SW 6 | SW 4 | — | — | — | — | — | SE 4 | SE 5 | SE 5 | SE 5 | SE 6 | S 6 | — | NW 4 |
3 | 10 | — | 1 | 20 | 24 | — | — | — | — | — | 12 | 37 | 77 | 117 | 165 | 344 | — | 12 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 85 | 25 | 634 | 49 | 665 | 219 | 24 | 24 | 769 | 769 | 702 | 362 | 415 | 605 | 2583 | 608 | 131 | 24 | 24 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











