Surf Forecasts:
Turtles surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8PM (local time) - 8ft (2.4m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 10ft (3.0m), 18s period, WSW swell with 5,546 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 8ft (2.4m), 16s period with WSW 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 Thursday (Aug 20) at 8PM. The primary swell is predicted to be 2.4m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Turtles in the next 16 days are 3.0m 18s and forecast to arrive on Wednesday (Aug 26) at 11PM. 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 27) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 8ft (2.4m) 16s |
| Best Surf | 8PM (Thu 20th Aug) | 8ft (2.4m) 16s |
| Most Powerful | 11PM (Wed 26th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Turtles over the next 16 days.
The Lowdown
Alright, let’s chew the fat on Turtles (reef break) for the next couple of weeks. This is a spot for advanced surfers only—we got a solid run of groundswell coming, but the wind’s going to make you work for it.
Kicking off Thursday afternoon, the 20th of August, with a bit of light rain that ain’t no worry. Swell’s at 8 ft from the WSW, with a really long period of 16 seconds—that’s proper groundswell. Combined energy is 3152, so there’s heaps of push. Wind is 15 km/h cross-off from the ENE, clean and tidy. Water temp is 72°F—right about average for this time of year. This is excellent for experienced surfers, and it’s a standout early. Spot can get crowded, fair warning.
Friday morning the 21st keeps the run going: 7 ft from the WSW with a 15-second period, and wind swings to E at 20 km/h, straight offshore. Gorgeous, clean. Energy is 2043—strong but manageable. Another beauty of a morning.
Friday afternoon the swell backs off a bit to 7 ft, same direction and period, with a gentle 15 km/h offshore from the ENE. Clean again, but crowds will be there.
Saturday the 22nd turns average. Morning is 6 ft from the SW with a 14-second period, but wind is a light 5 km/h cross-on from the SSW. Marginal surf—little wind ripples on the face. Afternoon gets worse: 20 km/h from the WSW cross-on, choppy mess. Skip it.
Sunday morning the 23rd is small at 5 ft from the SW, with a 16-second period, but wind picks up to 30 km/h from the SSE, cross-off and clean. Energy drops to 1317, weaker. Afternoon is a write-off: 35 km/h cross-shore from the S, lumpy and poor.
Monday the 24th morning bumps back up: 6 ft from the WSW with a 16-second period, 20 km/h cross-off from the SE. Clean and decent energy at 1699—worth a paddle. Afternoon gets messy again.
The rest of the week into the weekend is mixed. Tuesday the 25th morning is clean but small at 5 ft, dropping energy. Wednesday the 26th sees swell build to 7 ft by afternoon, but wind is cross-on and strong, lumpy. Thursday the 27th morning is the pick of the second half: 10 ft from the SW with a 16-second period, 35 km/h cross-off from the SSE, combined energy hitting a massive 4396. That’s heavy—only for experts. Afternoon ruined by cross-shore.
By Friday the 28th and Saturday the 29th, swell eases and wind stays cross-off but fresh, so clean but smaller. Energy drops below 2000.
Now, circle this: Sunday morning the 30th of August. Swell is only 3 ft from the W with a very long 21-second period—perfect for a reef. Combined energy is 1204, moderate, but the wind is 10 km/h offshore from the ESE. Glassy, clean, and that long period gives shape and power despite the size. Excellent for experienced surfers—a rare one.
Then Monday morning the 31st of August is another standout: 8 ft from the WSW with a 17-second period, combined energy of 3335, and light 10 km/h cross-off from the SSE. Clean, strong, excellent—one of the best on offer. Afternoon winds wreck it, so get out early.
Into the first week of September, swell hangs around the 7 ft to 8 ft mark, but wind is mostly cross-on or onshore, choppy and poor for paddling. A slight chance Wednesday morning the 2nd of September with a light cross-shore, but nothing to write home about. The good stuff dries up until the end, and crowds are inevitable at Turtles when it’s firing.
If you’re not an expert, the 10 ft days are too big. And for the days with strong cross-shore or onshore wind and decent swell, it looks more like a kite surf setup than paddle.
Best windows: Thursday afternoon the 20th through Friday morning the 21st, then Sunday morning the 30th and Monday morning the 31st of August. The long-range stuff on the 30th and 31st is promising but less certain—still, put it on the calendar.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Thu night. Warm (max 21°C on Fri night, min 17°C on Sun morning). Winds increasing (calm on Sat morning, fresh winds from the SSE by Sun morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Tue afternoon, min 16°C on Sun night). Winds decreasing (fresh winds from the S on Mon night, light winds from the SW by Tue afternoon). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | SW 14 | SW 14 | WSW 16 | SW 16 | SW 14 | WSW 14 | WSW 16 | SW 14 | WSW 14 | SW 13 | SW 12 | WSW 16 | WSW 16 | WSW 16 | WSW 18 |
Wave Graph | ||||||||||||||||||||
3152 | 2663 | 2043 | 1809 | 1714 | 1321 | 1170 | 1677 | 1178 | 731 | 947 | 1629 | 1863 | 990 | 689 | 827 | 344 | 1586 | 2510 | 5392 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | cross |
High Tide | 2:44PM0.64m | 2:41AM1.10m | 3:34PM0.56m | 3:22AM1.05m | 6:02PM0.50m | 4:20AM0.99m | 5:46AM0.96m | 7:17AM0.98m | 10:47PM0.73m | 8:24AM1.01m | 10:38PM0.79m | |||||||||
Low Tide | 7:20PM0.43m | 10:15AM0.40m | 7:23PM0.47m | 12:16PM0.42m | 6:22PM0.50m | 2:11PM0.37m | 3:01PM0.31m | 3:32PM0.26m | 2:14AM0.67m | 3:58PM0.22m | 3:15AM0.60m | |||||||||
— | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | |
6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | |
mm | 5 | 10 | 9 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 18 | 18 | 18 | 20 | 21 | 21 | 21 | 21 | 20 | 21 | 19 | 20 | 23 | 19 | 22 | 25 | 21 | 20 | 20 | 20 |
Feels °C | 17 | 17 | 16 | 19 | 21 | 22 | 20 | 19 | 15 | 15 | 14 | 17 | 20 | 14 | 19 | 22 | 19 | 18 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | SW 14 | SW 14 | WSW 16 | SW 16 | SW 14 | WSW 14 | WSW 16 | SW 14 | WSW 14 | SW 13 | WSW 12 | SW 12 | WSW 16 | WSW 16 | WSW 18 |
3152 | 2663 | 2043 | 1809 | 1714 | 1321 | 1170 | 1677 | 1178 | 731 | 947 | 1629 | 1863 | 990 | 689 | 488 | 303 | 1586 | 2510 | 5392 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 19 | WSW 18 | — | WSW 19 | WSW 18 | — | SSW 6 | — | — | S 6 | — | WSW 16 | — | WSW 20 | — |
— | — | — | — | — | 637 | 823 | — | 74 | 109 | — | 70 | — | — | 73 | — | 344 | — | 863 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 24 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 3 | — | — | — | S 3 | S 5 | SSW 5 | SSW 6 | — | — | S 5 | SE 4 | SW 12 | SSW 5 | SSW 5 | SW 4 | — |
— | — | — | 8 | — | — | — | 5 | 65 | 94 | 104 | — | — | 75 | 5 | 827 | 34 | 39 | 16 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 7 | 1693 | 1059 | 1059 | 1694 | 424 | 25 | 1059 | 424 | 25 | 1269 | 424 | 241 | 792 | 1059 |
Best forecast wave conditions in North West WA | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











