Surf Forecasts:
Turtles surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 2PM (local time) - 8ft (2.5m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 5AM (local time) - 10ft (3.0m), 16s period, WSW swell with 4,451 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 2PM (local time) - 8ft (2.5m), 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 Wednesday (Aug 19) at 2PM. The primary swell is predicted to be 2.5m 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 16s and forecast to arrive on Wednesday (Aug 19) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Aug 20) at 2AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Wed 19th Aug) | 8ft (2.5m) 16s |
| Best Surf | 2PM (Wed 19th Aug) | 8ft (2.5m) 16s |
| Most Powerful | 5AM (Wed 19th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Turtles over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s get straight into it for Turtles. This is an advanced reef setup that’s pretty exposed, so when the swell hits, it hits proper. We’ve got a big run of groundswell coming through, but the wind is going to be the main character in this story. The water temp is about average for the time of year, so nothing wild there, just your usual wetsuit situation.
We start off on Wednesday the 19th with some size. The morning has a solid 9.8ft swell from the WSW with a very long 16-second period, so there is a ton of energy in the water (3731 combined energy). The wind is a cross-off, but it’s a moderate breeze, so it’s going to be a bit bumpy. The afternoon improves a lot as the wind drops to a light breeze, with the swell easing to 7.9ft but still holding that long 15-second period (2546 energy). This is solid, powerful reef surf for experienced surfers only – over 8ft, so leave the foamies at home.
Thursday the 20th looks like a real standout. Both morning and afternoon are clean with light cross-off winds and a consistent 8.2ft swell from the WSW, with a long 16-second period and strong energy readings (3206 and 3287). Crowds are likely here as it’s pretty consistent when it’s good, and this is good. It’s still in that advanced-only zone.
Friday the 21st morning is where it gets glassy. The swell drops to 7.2ft from the SW with a 15-second period, but the wind goes glassy with an ESE breeze at just 3 mph. That’s a proper magic window for an advanced crew. The afternoon switches to an onshore W wind, so the session is over by lunch – get on it early.
Saturday the 22nd sees the swell drop to 6.2ft but the wind turns onshore from the SW, getting stronger through the afternoon and turning poor. Sunday the 23rd is a write-off with strong cross-shore winds and messy conditions, even though the swell is still solid. Monday the 24th morning has a clean window with 5.9ft swell and a cross-off breeze, but it’s marginal.
We hit a lull mid-week. Tuesday the 25th and Wednesday the 26th are small and mostly blown out, with only the odd clean window that’s not worth paddling out for. The energy drops significantly (down to 694 on Tuesday morning). Thursday the 27th and Friday the 28th have some size but are mostly wrecked by strong winds.
Looking further out, the last few days of August and into the start of September offer some hope. Monday the 31st of August is a promising call: morning has a true offshore wind from the East at 19 mph with 5.2ft swell – that will be clean and lined up, a rare treat later in the run. The afternoon of the 31st is also clean with a light breeze (1822 energy). That Monday 31st could be the best of the second week.
Overall, the biggest standout is Thursday the 20th with consistent, powerful waves and clean conditions. The glassy Friday morning the 21st is the best quality window, but it’s short-lived. The long-range Monday the 31st looks promising for a clean, offshore session.
Short Range ForecastHeavy rain (total 28mm), heaviest during Thu morning. Warm (max 25°C on Wed afternoon, min 16°C on Wed night). Winds decreasing (fresh winds from the SSE on Wed night, calm by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon afternoon, min 16°C on Mon morning). Winds increasing (light winds from the S on Sat morning, strong winds from the S by Sun night). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | 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 | |||||||||||||||||||||
3480 | 2650 | 2510 | 3192 | 3152 | 2663 | 2043 | 1963 | 1714 | 1407 | 1387 | 1531 | 1193 | 731 | 586 | 1350 | 1463 | 893 | 604 | 540 | 298 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | off | cross | off | cross-on | on | cross | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | 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 | 8:21AM0.31m | 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 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | |
— | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | 10 | 12 | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 25 | 20 | 17 | 19 | 18 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 19 | 20 | 23 | 19 | 21 | 24 | 20 |
Feels °C | 17 | 22 | 16 | 16 | 21 | 17 | 21 | 21 | 23 | 21 | 19 | 18 | 14 | 14 | 12 | 15 | 19 | 13 | 16 | 20 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
3480 | 2650 | 2510 | 3192 | 3152 | 2663 | 2043 | 1963 | 1714 | 1407 | 1387 | 1531 | 1193 | 731 | 586 | 1350 | 1463 | 893 | 604 | 540 | 298 | |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 18 | — | — | — | — | — | — | WSW 19 | WSW 18 | — | WSW 20 | WSW 18 | WSW 16 | SSW 6 | — | — | — | — | WSW 15 |
— | — | 842 | — | — | — | — | — | — | 772 | 553 | — | 75 | 246 | 561 | 70 | — | — | — | — | 209 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 24 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | |
Wind waves Height (m) Direction Period (s) | SE 3 | — | SSE 4 | — | — | — | — | — | — | — | — | SSW 4 | S 5 | SSW 6 | SSW 7 | SE 4 | S 4 | S 5 | SSW 5 | SSW 4 | SSW 5 |
7 | — | 15 | — | — | — | — | — | — | — | — | 16 | 62 | 135 | 206 | 14 | 15 | 61 | 19 | 17 | 41 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 424 | 241 | 0 | 7 | 0 | 0 | 7 | 0 | 1059 | 25 | 241 | 1059 | 1059 | 915 | 1059 | 424 | 25 | 1163 | 521 | 241 | 1292 |
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.











