Surf Forecasts:
Turtle Cove surf forecast from 20 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 2AM (local time) - 2.5ft (0.8m), 6s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 4.5ft (1.4m), 7s period, SE swell with 168 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 2AM (local time) - 2.5ft (0.8m), 6s period with SSW swell.
Best Forecast Surf Conditions for Turtle Cove this week:
The surf forecast for Turtle Cove over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 2AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.4m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Turtle Cove in the next 16 days are 1.4m 7s and forecast to arrive on Wednesday (Aug 26) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Aug 23) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 25th Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 2AM (Tue 25th Aug) | 2.5ft (0.8m) 6s |
| Most Powerful | 11PM (Wed 26th Aug) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for Turtle Cove over the next 16 days.
The Lowdown
Righto, let’s have a look at what’s on offer at Turtle Cove (Big Island) for the next couple of weeks.
Honestly, mate, the outlook is pretty flat. There’s a long stretch of poor conditions, and it’s going to be a real waiting game. The water temperature is 72°, which is pretty average for this time of year, so nothing to write home about there.
We kick off on Thursday morning, 20 August, with tiny 0.4ft SE windswell, period a short 7 seconds. The wind is light offshore from the W, so it’s clean, but there’s barely any energy (28). It’s a real struggle for a proper wave. The whole of that first week is a write-off: Friday through to Monday see onshore or cross-onshore winds, minimal swell heights under 3ft, and energy levels staying under 100. The best of the first week is really just a few afternoons where the wind goes cross-offshore, but the swell is too small to get excited about. The energy stays weak.
Around Tuesday morning, 25 August, we finally see a small spike in quality. Nothing huge – 2ft SSW swell, period still short at 6 seconds, but the wind is light cross-offshore from the S, making the surface clean. The energy is only 50, but the wave comment says “surfable waves but very ordinary conditions”. It’s not a standout, just the best of a bad bunch. Still, if you’re desperate for a paddle, that’s your window.
Then there’s a gap of a few days with poor conditions again: Wednesday through Friday have onshore windswell from the ENE and ESE, bumpy and choppy. The energy climbs a bit on Wednesday (137 and 168), but the wind is either onshore or glassy with poor conditions. The glassy Wednesday afternoon with 4ft SSE swell and 7-second period is technically the cleanest wave of the period, but the wave comment says it’s still “very ordinary”.
The second week is quiet. From Saturday, 29 August, to Wednesday, 3 September, the swell stays tiny (1ft to 3ft) mostly from the S or SSE. The wind is cross-offshore for most of it, so the surface is clean, but the energy is weak and the wave quality is poor. There’s no real standout swell.
The only notable event is way out on Friday, 4 September. The afternoon brings 6ft E swell with a short 7-second period – that’s moderate energy (262) – but it’s coming straight onshore from the ESE at 20 km/h, so it’ll be messy. That’s the biggest swell of the lot, but the wind ruins it. For a reef and point, a longer period would have been better.
Overall, there’s nothing here worth a mission. The best chance for a surf is that Tuesday morning, 25 August, for a cleanish but tiny wave. Everything else is either too small, too choppy, or too windy. If you’re a kiteboarder, the strong onshore winds later on might be more interesting than a paddle.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sat afternoon. Warm (max 25°C on Thu afternoon, min 17°C on Thu night). Winds increasing (light winds from the W on Thu morning, fresh winds from the ENE by Sat morning). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun morning. Warm (max 25°C on Sun afternoon, min 19°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon afternoon, light winds from the SW by Tue morning). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 7 | ESE 8 | SE 8 | SE 8 | ENE 5 | ENE 4 | ESE 8 | SE 4 | S 5 | SSE 6 | S 6 | SSW 6 | SW 6 | SSW 6 | SE 11 | SE 10 | S 6 | SSE 6 | SSE 7 | SE 7 |
Wave Graph | |||||||||||||||||||||
13 | 12 | 27 | 18 | 22 | 31 | 23 | 11 | 22 | 16 | 77 | 104 | 64 | 56 | 41 | 22 | 17 | 17 | 112 | 154 | 151 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross-on | cross-on | cross-on | on | cross-on | on | cross | cross | off | off | off | cross-off | cross-off | cross | cross | on | glassy | cross-on |
High Tide | 2:23PM0.77m | 1:53AM0.57m | 3:43PM0.74m | 3:07AM0.55m | 4:56PM0.75m | 5:09AM0.57m | 5:52PM0.77m | 6:10AM0.62m | 6:36PM0.80m | 6:56AM0.68m | 7:13PM0.84m | 7:34AM0.74m | 7:45PM0.87m | ||||||||
Low Tide | 8:51PM0.30m | 7:45AM0.24m | 10:13PM0.29m | 8:54AM0.27m | 11:11PM0.26m | 10:13AM0.26m | 11:56PM0.22m | 11:19AM0.23m | 00:32AM0.16m | 12:09PM0.19m | 1:04AM0.11m | 12:53PM0.14m | 1:34AM0.06m | ||||||||
6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:30 | — | |
mm | — | — | 6 | — | — | — | 5 | 17 | 6 | 5 | 1 | 6 | — | — | — | — | — | 7 | 1 | — | — |
Temp °C | 24 | 25 | 23 | 20 | 22 | 22 | 19 | 21 | 20 | 23 | 25 | 25 | 19 | 24 | 23 | 21 | 22 | 23 | 23 | 23 | 23 |
Feels °C | 25 | 25 | 20 | 18 | 21 | 22 | 16 | 20 | 20 | 23 | 25 | 23 | 16 | 17 | 18 | 19 | 21 | 22 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 8 | SE 8 | SE 8 | SE 8 | SE 5 | ESE 8 | SE 4 | ESE 5 | ESE 12 | S 6 | SSW 6 | SE 6 | SSW 6 | SSW 6 | SSW 6 | S 6 | SSE 6 | SSE 7 | SE 7 |
13 | 12 | 27 | 18 | 17 | 17 | 7 | 11 | 22 | 5 | 14 | 104 | 64 | 13 | 41 | 22 | 12 | 16 | 112 | 154 | 151 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | S 5 | S 6 | SSW 5 | SSW 6 | ESE 8 | SSE 5 | ESE 8 | ESE 12 | — | SE 12 | SE 12 | SE 11 | SE 6 | SE 11 | SE 10 | SE 10 | SE 9 | SE 9 | SSW 6 |
12 | 12 | 2 | 1 | 3 | 3 | 12 | 4 | 6 | 15 | — | 22 | 21 | 19 | 10 | 18 | 17 | 17 | 14 | 14 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSE 6 | S 5 | — | E 7 | SE 14 | SSE 5 | SSW 5 | ESE 9 | SE 9 | ESE 7 | — | E 7 | E 7 | — | SE 11 | SE 6 | SE 6 | ESE 6 | ESE 11 | — | E 12 |
3 | 2 | — | 1 | 8 | 3 | 3 | 8 | 13 | 5 | — | 3 | 4 | — | 18 | 10 | 6 | 4 | 11 | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | NNE 3 | ENE 4 | E 4 | ENE 5 | ENE 4 | E 4 | — | S 5 | SSE 6 | NW 3 | — | SW 6 | NNW 3 | — | — | — | — | — | — |
— | — | 4 | 13 | 22 | 31 | 23 | 8 | — | 16 | 77 | 3 | — | 56 | 4 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 183 | 214 | 214 | 657 | 1107 | 219 | 645 | 132 | 139 | 233 | 195 | 197 | 48 | 78 | 0 | 0 | 214 | 167 | 26 | 0 | 0 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Turtle Cove Surf forecast
The above surf forecast table for Turtle Cove provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Turtle Cove can be found by selecting the local surf guide option on the grey menu. Our Turtle Cove 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 (Turtle Cove) 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 Turtle Cove 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.
Turtle Cove is 34 km (21 miles) from Westerly. If you plan a vacation in Long Island New York, 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.











