Surf Forecasts:
Block Island surf forecast from 24 Aug 2026:
- Most powerful swell: Monday 24 Aug, 5AM (local time) - 3.5ft (1.1m), 6s period, S swell with 95 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 1.1m 6s and forecast to arrive on Monday (Aug 24) 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 4s period and expected on Monday (Aug 24) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Mon 24th Aug) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Block Island over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let’s be straight: it’s a quiet stretch ahead for Block Island. The water’s sitting at about 70°, which is pretty normal for this time of year, nothing wild going on there.
The whole 16-day window is a bust for decent waves. Honestly, there’s nothing I’d paddle out for. From now right through the end of August and into the first week of September, the swell is tiny—mostly under 3 ft—and the wind is almost always a cross or cross-on breeze messing it up. The combined swell energy is weak, often below 100 (like 40 to 86), meaning there’s just no push. You’d be bobbing around on nothing.
Now, there *is* a bit of a pulse that shows up around September 3rd. On Thursday the 3rd, the morning and afternoon both see a clean 4 ft swell from the SE, with a proper 12 to 13 second period and a gentle offshore wind from the NNW. The energy jumps to a moderate 350 to 444, and the conditions are labeled clean. That’s the standout in this whole outlook. But remember, Block Island itself is a point break that rarely breaks, and it needs the right swell direction and wind. This SE swell coming in with a NNW offshore is about as good as it gets here, but it’s still only chest-high at best, and it’s a long way off—over a week away—so treat it as a promising but not locked-in option.
Before that, September 2nd has some energy building (223 to 250) but the wind is onshore or cross-on and the surf is marginal. Not worth it. By September 4th, the wind swings around to a strong cross-off from the NE with similar chest-high swell, but the energy is strong (436 to 450) and the conditions are clean. That Friday afternoon might surprise a few patient souls, but it’s still not a guarantee.
After that, September 5th through the 7th sees a jumbled mess of E swell around 4 ft to 5 ft, but the period is short (7 to 10 seconds) and the wind is mostly cross or cross-on with a chop, so it’s not going to be pretty. The energy drops back to moderate levels (175 to 315). The only real highlight in the whole two weeks is that Thursday the 3rd. If you’re desperate, maybe keep an eye on it, but otherwise, the island is flat and windy. This is one of those stretches where the lack of consistent breaks is pretty normal for the area.
Stay patient, and check back in.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 25°C on Sun night, min 18°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Thu morning, min 21°C on Wed afternoon). Wind will be generally light. | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 12 | SSE 6 | S 6 | S 6 | S 6 | SE 11 | SE 10 | SE 10 | SE 9 | SE 8 | SE 8 | ESE 8 | SE 9 | SE 9 | SE 8 | SE 8 | S 6 | SE 8 | S 6 | SE 8 |
Wave Graph | ||||||||||||||||||||
22 | 80 | 61 | 51 | 36 | 29 | 17 | 36 | 62 | 72 | 53 | 40 | 31 | 62 | 57 | 55 | 33 | 48 | 33 | 34 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-off | glassy | cross-on | glassy |
High Tide | 5:53PM0.83m | 6:12AM0.69m | 6:36PM0.86m | 6:56AM0.76m | 7:13PM0.89m | 7:35AM0.82m | 7:47PM0.91m | 8:10AM0.87m | 8:18PM0.93m | 8:43AM0.91m | 8:50PM0.94m | 9:14AM0.95m | 9:25PM0.94m | |||||||
Low Tide | 00:18AM0.20m | 12:06PM0.18m | 00:57AM0.14m | 12:50PM0.15m | 1:31AM0.09m | 1:30PM0.11m | 2:02AM0.05m | 2:08PM0.09m | 2:30AM0.02m | 2:43PM0.07m | 2:55AM0.01m | 3:19PM0.05m | 3:22AM0.00m | |||||||
— | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | |
7:34 | — | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — | |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 23 | 25 | 23 | 23 | 24 | 21 | 22 | 22 | 20 | 22 | 23 | 24 | 24 | 24 | 23 | 24 | 24 | 23 | 24 | 24 |
Feels °C | 23 | 24 | 22 | 21 | 21 | 19 | 18 | 20 | 17 | 18 | 20 | 23 | 23 | 23 | 26 | 26 | 24 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 3 | SSE 6 | S 6 | S 6 | S 6 | SSW 6 | SE 6 | SW 4 | SE 9 | SE 8 | SE 8 | ESE 8 | ESE 8 | SE 9 | SE 8 | SE 8 | S 6 | S 6 | S 6 | SSW 6 |
3 | 80 | 61 | 51 | 36 | 18 | 10 | 16 | 62 | 72 | 53 | 40 | 22 | 62 | 57 | 55 | 31 | 36 | 33 | 26 | |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 12 | SE 12 | SE 11 | SE 11 | SE 6 | SE 10 | SE 10 | SW 5 | S 6 | S 6 | E 11 | SE 9 | E 11 | E 10 | E 10 | SE 8 | SE 8 | SE 8 | SE 8 |
11 | 22 | 21 | 19 | 18 | 10 | 17 | 36 | 12 | 1 | 7 | 2 | 31 | 2 | 2 | 2 | 33 | 48 | 31 | 34 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | E 7 | E 7 | ESE 7 | SE 11 | E 6 | ESE 6 | SE 5 | — | E 12 | E 11 | E 11 | — | — | — | E 10 | E 9 | E 9 | E 9 |
22 | 22 | 4 | 4 | 9 | 29 | 1 | 3 | 1 | — | 3 | 2 | 2 | — | — | — | 2 | 2 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | SSW 3 | WSW 4 | WSW 5 | — | W 3 | W 4 | SW 4 | WNW 4 | NW 3 | SW 4 | SW 4 | SSW 6 | SSW 4 | SSW 5 | S 5 | S 5 | — | — | — | — |
4 | 6 | 7 | — | 2 | 1 | 12 | 6 | 1 | 11 | 7 | 24 | 13 | 38 | 47 | 36 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1541 | 24 | 24 | 24 | 26 | 159 | 198 | 49 | 24 | 1084 | 133 | 159 | 608 | 198 | 24 | 415 | 24 | 24 | 24 | 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.











