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: Tuesday 18 Aug, 5PM (local time) - 11ft (3.5m), 17s period, WSW swell with 5,993 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 3.5m 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 1.1m 5s period and expected on Wednesday (Aug 19) at 11PM.
| 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 | 5PM (Tue 18th Aug) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Turtles over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking.
The first real action is on Tuesday morning, August 18th at Turtles. This is an advanced reef break, and it’s not messing around. We’re looking at a serious 10ft swell pushing in from the WSW, with a long 17-second period. That’s proper groundswell, and it’s packing some serious punch – the combined wave energy is absolutely pumping (5651). The water temp is sitting at 72°, which is about normal for this time of year, so nothing wild there. The wind is a light SE breeze, blowing cross-offshore, which will keep the faces clean. This is the standout session of the whole forecast – a big, powerful, clean swell for those who know what they’re doing. Get on it early.
By Tuesday afternoon, the wind swings around to the WSW and gets messy, turning cross-on. The swell bumps up to 12ft (5993 energy), but it’s going to be choppy and blown out. Not your session.
Wednesday morning, August 19th, the swell drops a touch to 8ft with a 16-second period, but the wind is up to 25 km/h from the SE. It’s cross-off, so it’s clean, but the power is fading (3480 energy). It’s a marginal call for experienced surfers.
Thursday morning, August 20th, is the next highlight. The swell is still a solid 8ft from the WSW, 16-second period, with a light SE breeze (15 km/h) keeping it clean. The energy is still strong (3319). Then Thursday afternoon is a real treat – the wind turns offshore from the ESE at 15 km/h, glassing up those 8ft sets. This is excellent, clean surf for the experienced crew.
Friday morning, August 21st, offers a smaller but still fun option: 7ft from the SW, 15-second period, with light offshore wind from the ESE. Clean waves, but the energy is dropping (2120). The best bet of the week is definitely Tuesday morning or Thursday afternoon.
The weekend spoils a bit. Saturday, August 22nd, starts with a 6ft swell and light cross-on wind, then the afternoon gets hammered by a 25 km/h SSW wind, making it choppy and poor. Sunday, August 23rd, is a write-off with strong winds and messy, lumpy conditions.
The start of the new week is a bit of a mixed bag. Monday, August 24th, has a clean 6ft swell in the morning with a moderate breeze, but the afternoons are getting chewed up by strong cross-shore winds. This pattern of marginal morning windows and blown-out afternoons holds for the rest of the week.
Looking further out, Monday morning, August 31st, shows a fresh pulse of 8ft WSW swell with a 16-second period, and the wind is a fresh SE breeze, keeping it clean. The energy is ramping back up (2940). Tuesday morning, September 1st, has a clean 7ft swell with offshore wind from the E. It’s promising, but we’re a couple of weeks out, so keep an eye on it.
Wednesday morning, September 2nd, is another one to watch: a solid 10ft pulse from the WSW, 14-second period, with a moderate NE cross-off wind. The energy is high (3562), but it’s a long-range call, so don’t book the time off just yet.
Overall, there’s a good clean run of surf for the first few days, especially for the experienced surfer. The real standout is Tuesday morning, August 18th – that’s the one to bend your schedule for. The second week is more of a waiting game, with a few promising mornings but nothing you can set your watch by.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Thu morning. Warm (max 22°C on Tue afternoon, min 15°C on Wed night). Winds increasing (light winds from the SE on Tue morning, fresh winds from the SSE by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 22°C on Fri afternoon, min 16°C on Sun night). Winds increasing (light winds from the W on Fri afternoon, fresh winds from the S by Sun afternoon). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 17 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | WSW 16 | WSW 14 | WSW 14 |
Wave Graph | |||||||||||||||||||||
5651 | 5993 | 4844 | 3480 | 2650 | 2235 | 3319 | 3278 | 2663 | 2120 | 1963 | 1714 | 1533 | 1253 | 1551 | 1178 | 822 | 811 | 1650 | 1191 | 1014 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-on | cross | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross | cross |
High Tide | 1:30PM0.84m | 1:37AM1.19m | 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 | ||||||||||
Low Tide | 6:52PM0.34m | 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 | ||||||||||
6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | |
— | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | |
mm | — | — | — | — | — | 8 | 9 | 3 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 22 | 20 | 20 | 22 | 19 | 15 | 17 | 18 | 21 | 22 | 21 | 21 | 21 | 20 | 20 | 21 | 19 | 20 | 22 | 19 |
Feels °C | 20 | 21 | 19 | 15 | 19 | 13 | 13 | 16 | 18 | 20 | 22 | 20 | 20 | 18 | 16 | 15 | 15 | 14 | 15 | 18 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | WSW 16 | WSW 14 | WSW 14 |
5651 | 5993 | 4844 | 3480 | 2650 | 2235 | 3319 | 3278 | 2663 | 2120 | 1963 | 1714 | 1533 | 1253 | 1551 | 1178 | 822 | 811 | 1650 | 1191 | 1014 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 18 | — | — | — | — | W 26 | W 22 | WSW 19 | WSW 18 | — | WSW 20 | W 20 | WSW 18 | — | — | — |
— | — | — | — | — | 842 | — | — | — | — | 13 | 38 | 502 | 713 | — | 78 | 194 | 516 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 3 | — | S 5 | — | — | — | — | — | — | — | — | S 5 | S 5 | S 5 | S 6 | S 6 | SSW 4 | S 5 |
— | — | — | 6 | — | 62 | — | — | — | — | — | — | — | — | 44 | 45 | 78 | 103 | 68 | 41 | 56 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1269 | 424 | 7 | 25 | 241 | 0 | 0 | 25 | 0 | 1059 | 7 | 25 | 1693 | 1059 | 915 | 1081 | 424 | 25 | 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.











