Surf Forecasts:
Turtles surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 5AM (local time) - 8ft (2.4m), 16s period, WSW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 11AM (local time) - 8ft (2.5m), 16s period, WSW swell with 3,192 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5AM (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 5AM. The primary swell is predicted to be 2.4m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Turtles in the next 16 days are 2.5m 16s and forecast to arrive on Thursday (Aug 20) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 19) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 20th Aug) | 8ft (2.4m) 16s |
| Best Surf | 5AM (Thu 20th Aug) | 8ft (2.4m) 16s |
| Most Powerful | 11AM (Thu 20th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Turtles over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s run through what we’ve got.
The only spot in the picture is Turtles, an advanced reef break that’s fairly consistent and exposed to the swell. It’s pulling in a serious, long-period groundswell from the WSW, with combined wave energy in the thousands (3369), so there’s plenty of power. The water temp is 22°, which is typical for this time of year.
The absolute best session in the whole window is Thursday morning, August 20th. We’re looking at a clean 8ft WSW swell with a 16-second period – that’s proper groundswell. A light cross-off breeze is keeping it glassy. This is for experienced surfers only, as the size is well over 8ft. The sets will be spaced out but heavy.
Thursday afternoon (August 20th) is nearly as good, with glassy conditions and the same 8ft, 16-second swell.
Friday morning, August 21st, is still clean and glassy, with a slightly smaller 7ft SW swell.
By Saturday, August 22nd, the wind turns onshore and the surf gets choppy and messy through the weekend, with winds up to 22 mph. Not worth the paddle.
Monday and Tuesday (August 24-25) are cleaner but the swell drops to 5-5ft and energy levels fall off (as low as 656). Rideable, but not exciting.
Things pick up again on Wednesday afternoon, August 26th, with a 7ft, 17-second swell, but the cross-chop ruins it. Thursday (August 27th) is similar – big swell, messy conditions.
The biggest standout of the second week is Friday morning, August 28th. Clean with a 8ft SW swell and a gentle cross-off breeze. Energy is solid (2344). Expert-only.
The swell fades on Saturday (August 29th), but then Sunday morning (August 30th) throws a curveball: only 3ft, but from the west with a very long 22-second period, and offshore wind. The energy is still high (1808). This will be clean, lined-up reef waves with long breaks between sets. A relaxed, high-quality session.
Monday, August 31st, has a clean morning, and Monday afternoon turns glassy with a 7ft, 17-second swell. That could be a hidden gem.
Into September, the wind gets onshore again. Wednesday morning, September 2nd, has near-calm winds and a 7ft swell, but there’s already some cross-chop developing.
So, the best of the best is Thursday, August 20th, with Friday morning, August 28th as the top call for the second week. Keep an eye on that Sunday, August 30th – it’s different, but it could be special.
This is Rusty. Catch you out there.
Short Range ForecastModerate rain (total 15mm), heaviest on Wed night. Warm (max 24°C on Wed afternoon, min 15°C on Wed night). Winds decreasing (fresh winds from the SSE on Wed night, calm by Sat morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Mon afternoon, min 15°C on Mon morning). Winds decreasing (strong winds from the S on Sun night, light winds from the ESE by Tue morning). | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2650 | 2206 | 3192 | 3152 | 2663 | 2148 | 2065 | 1690 | 1407 | 1253 | 1531 | 993 | 648 | 532 | 1258 | 1463 | 743 | 613 | 590 | 303 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-on | cross-off |
High Tide | 2:06PM0.73m | 2:08AM1.16m | 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 | |||||||||
Low Tide | 7:08PM0.39m | 9:10AM0.35m | 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 | |||||||||
 |  |  | |  |  | |  | |  | | | | | | | | | | | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — |
mm | — | 10 | 2 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 16 | 17 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 19 | 20 | 24 | 20 | 23 | 26 | 22 |
Feels °C | 22 | 12 | 16 | 20 | 20 | 20 | 21 | 21 | 21 | 19 | 18 | 16 | 15 | 13 | 15 | 20 | 14 | 19 | 23 | 19 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
| kJ | 2650 | 2206 | 3192 | 3152 | 2663 | 2148 | 2065 | 1690 | 1407 | 1253 | 1531 | 993 | 648 | 532 | 1258 | 1463 | 743 | 613 | 590 | 303 |
Swell 2 Height (m) Direction Period (s) | — | WSW 18 | — | — | — | — | W 26 | — | WSW 19 | WSW 18 | — | WSW 20 | WSW 18 | WSW 16 | SSW 7 | — | — | SSW 6 | — | WSW 15 |
| kJ | — | 842 | — | — | — | — | 13 | — | 637 | 823 | — | 75 | 243 | 463 | 99 | — | — | 44 | — | 263 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 24 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 |
Wind waves Height (m) Direction Period (s) | — | S 4 | — | — | — | — | — | — | — | — | SSW 4 | SSW 7 | SSW 7 | SSW 7 | SE 4 | S 4 | S 5 | — | — | SSW 4 |
| kJ | — | 11 | — | — | — | — | — | — | — | — | 13 | 193 | 265 | 277 | 15 | 14 | 95 | — | — | 25 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 25 | 7 | 0 | 0 | 0 | 7 | 243 | 422 | 241 | 1059 | 1059 | 916 | 1059 | 424 | 25 | 1059 | 424 | 7 | 545 | 424 |
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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