Surf Forecasts:
Turtles surf forecast from 15 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 11AM (local time) - 10ft (3.0m), 17s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 5PM (local time) - 10ft (3.0m), 17s period, WSW swell with 5,723 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 8AM (local time) - 4.5ft (1.4m), 13s period with SW swell.
Best Forecast Surf Conditions for Turtles this week:
The surf forecast for Turtles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 8AM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 0.6m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Turtles in the next 16 days are 3.0m 17s and forecast to arrive on Tuesday (Aug 18) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Thursday (Aug 20) at 5AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 16th Aug) | 4.5ft (1.4m) 13s |
| Best Surf | 11AM (Tue 18th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 5PM (Tue 18th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Turtles over the next 16 days.
The Lowdown
Rusty here. Let’s talk about Turtles, just for you. It’s a reef break for the advanced crew, needing that SW groundswell to get it going.
The top pick is hands-down Saturday morning, August 15th. You’ve got a 6ft swell coming from the SSW, with a long 15 second period—proper groundswell. Combined energy is sitting at 1448, which is a good moderate punch. The wind is light offshore from the east at 6 mph, glassing it right up. Water temp is 72°, which is about normal for the season. That’s the one to set the alarm for.
Saturday afternoon turns cross-onshore and gets messy. From the 16th through the rest of the week, the wind goes onshore or cross-shore, and the waves turn choppy. It goes quiet for a few days.
Then Tuesday morning, August 18th, we get a big one. Swell jumps to 10ft from the WSW with a 17 second period—very long period groundswell. Combined energy hits 4701, which is strong. The wind is cross-off from the ESE at 9 mph, keeping things clean in the morning. That’s big wave territory, only for experts. The afternoon wind turns onshore and strong, so don’t sleep in.
From the 19th to the 24th, surf hangs between 6ft and 8ft, but winds stay cross or cross-off, making the afternoons lumpy. Mornings on the 19th, 20th, and 21st offer some cleaner windows with cross-off breezes. The 21st morning, with a 7ft SSW swell and a 15 second period, is the most likely to be rideable in that stretch.
Then it gets ugly. From the 25th to the 28th, strong winds and dropping swell kill it. A gap of several days with nothing to talk about.
Looking way ahead to Sunday, August 30th morning, there’s another big pulse: 8ft at 16 seconds from the WSW, combined energy of 3479, and a light cross-off breeze. It looks clean and powerful, but that’s two weeks out, so keep an eye on it but don’t lock in plans.
Best bets: Saturday the 15th morning, Tuesday the 18th morning. The 30th is a long-range maybe. The rest is mostly a write-off.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat afternoon, min 18°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Tue afternoon, min 15°C on Thu morning). Winds increasing (light winds from the SW on Tue afternoon, fresh winds from the S by Wed night). | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 16 | WSW 16 | WSW 16 | WSW 17 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | SW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1421 | 1094 | 951 | 642 | 501 | 1397 | 2028 | 2136 | 2624 | 4701 | 5723 | 4717 | 3369 | 3307 | 2477 | 3000 | 2936 | 2359 | 2168 | 1889 | 1111 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross | cross-on | cross-on | on | on | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross |
High Tide | 11:31AM1.13m | 00:11AM1.11m | 12:14PM1.05m | 00:39AM1.17m | 12:53PM0.94m | 1:08AM1.19m | 1:30PM0.84m | 1:37AM1.19m | 2:06PM0.73m | 2:08AM1.16m | 2:44PM0.64m | 2:41AM1.10m | 3:34PM0.56m | 3:22AM1.05m | |||||||
Low Tide | 5:48PM0.18m | 6:09AM0.29m | 6:12PM0.23m | 6:54AM0.26m | 6:33PM0.29m | 7:37AM0.27m | 6:52PM0.34m | 8:21AM0.31m | 7:08PM0.39m | 9:10AM0.35m | 7:20PM0.43m | 10:15AM0.40m | 7:23PM0.47m | ||||||||
 | |  | | |  |  | | | | | | | | | | | | | | | |
 | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 21 | 21 | 22 | 21 | 21 | 20 | 20 | 20 | 23 | 20 | 20 | 23 | 19 | 19 | 22 | 19 | 22 | 25 | 22 |
Feels °C | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 22 | 16 | 15 | 19 | 12 | 13 | 16 | 13 | 16 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 16 | WSW 16 | WSW 16 | WSW 17 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | SW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 14 |
| kJ | 1421 | 1094 | 951 | 642 | 501 | 1397 | 2028 | 2136 | 2624 | 4701 | 5723 | 4717 | 3369 | 3307 | 2477 | 3000 | 2936 | 2359 | 2168 | 1889 | 1111 |
Swell 2 Height (m) Direction Period (s) | S 6 | — | — | SSW 5 | WSW 18 | — | — | W 20 | SSW 4 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 27 | — | — | 16 | 243 | — | — | 500 | 8 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SSW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 6 | S 4 | — | NW 3 | WNW 4 | — | SW 4 | — | — | — | — | SSE 4 | S 5 | SE 4 | S 5 | S 5 | S 6 | ESE 4 | S 4 | SSW 6 |
| kJ | — | 13 | 14 | — | 3 | 10 | — | 6 | — | — | — | — | 15 | 126 | 10 | 70 | 75 | 144 | 12 | 48 | 170 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 845 | 422 | 241 | 500 | 537 | 1693 | 1281 | 0 | 0 | 1269 | 424 | 241 | 1109 | 424 | 424 | 1073 | 541 | 25 | 792 | 521 |
Best forecast wave conditions in North West WA | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Turtles Surf forecast
The above surf forecast table for Turtles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Turtles can be found by selecting the local surf guide option on the grey menu. Our Turtles 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 (Turtles) 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 Turtles 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.
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