Surf Forecasts:
Turtles surf forecast from 16 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 11AM (local time) - 10ft (3.0m), 17s period, WSW swell with offshore winds.
- Most powerful swell: Tuesday 18 Aug, 2PM (local time) - 11ft (3.5m), 17s period, WSW swell with 6,211 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 7ft (2.1m), 17s 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 Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 2.1m and 17s 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 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Wednesday (Aug 19) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 18th Aug) | 7ft (2.1m) 17s |
| Best Surf | 11AM (Tue 18th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 2PM (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 Turtles has cooking.
Don't get your hopes up for these first couple days. The swell is there, but the wind is blowing straight onshore or cross-onshore, making for a lumpy, choppy mess. Things turn around sharply on Tuesday the 18th.
That Tuesday the 18th morning is the one to circle. The wind will be offshore out of the ESE at only 6 mph, meaning the lineup will be glassy. The swell is a proper 10 ft from the WSW with a very long 17-second period. That’s serious groundswell energy, clocked at 5488 (strong to very strong wave energy). This is an expert-only session – over 8 ft is game on for the brave. The offshore breeze and the long period will make for clean, powerful walls on the reef.
Wednesday the 19th morning offers another clean look with the swell dropping to 8 ft (WSW, 16-second period) and a cross-offshore breeze from the SE at 16 mph. Energy is still strong (3369), but it’s not the highlight.
After that, it gets mixed. The mornings are often clean, but the afternoons blow out. The swell sticks around the 7 ft to 8 ft range through the 22nd, but the wind quality is hit or miss. The water temp is about average for the time of year, nothing weird there.
There’s a quiet, wind-affected stretch from the 23rd to the 29th, where the mornings offer cleaner conditions but much weaker energy.
The sneaky good session comes early on Sunday the 30th. The swell is only 4 ft from the WSW, but the period is a long 16 seconds, and the wind is nearly dead calm out of the SE at 3 mph. The energy is moderate (1420), but the conditions are “excellent for experienced surfers.” That’s a super clean morning for a longboard or a fish if you know how to work a long-period groundswell.
Best on offer: hands down, Tuesday the 18th morning. Second look: the clean glass on Sunday the 30th for smaller gear.
First week has some fire, but expect a few days of quiet in the second week before that final window.
Rusty, signing off.
Short Range ForecastSome drizzle, heaviest during Wed afternoon. Warm (max 23°C on Tue afternoon, min 18°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 24°C on Fri afternoon, min 17°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 16 | WSW 17 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 15 | SW 15 | SW 14 | WSW 15 |
Wave Graph | |||||||||||||||||||
1547 | 1851 | 1706 | 2624 | 5488 | 6065 | 4844 | 3369 | 2763 | 2432 | 3463 | 3192 | 2550 | 2175 | 2010 | 1809 | 1810 | 1649 | 1613 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-off | off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross |
High Tide | 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 | 6:02PM0.50m | 4:20AM0.99m | ||||||
Low Tide | 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 | 12:16PM0.42m | 6:22PM0.50m | |||||||
— | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | |
6:08 | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 21 | 20 | 21 | 23 | 20 | 20 | 19 | 18 | 18 | 22 | 20 | 22 | 24 | 22 | 22 | 22 | 21 |
Feels °C | 19 | 19 | 18 | 18 | 20 | 22 | 18 | 16 | 16 | 16 | 15 | 20 | 17 | 20 | 22 | 18 | 22 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | WSW 17 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 15 | SW 15 | SW 14 | WSW 15 |
1547 | 1851 | 1706 | 2624 | 5488 | 6065 | 4844 | 3369 | 2763 | 2432 | 3463 | 3192 | 2550 | 2175 | 2010 | 1809 | 1810 | 1649 | 1613 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 19 | WSW 19 | — |
— | — | 290 | — | — | — | — | — | — | — | — | — | — | — | — | — | 96 | 495 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | W 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WNW 3 | W 4 | WSW 4 | — | — | — | — | SSE 4 | — | S 4 | SSE 4 | S 4 | S 5 | — | — | S 4 | — | SW 3 | SSW 4 |
4 | 10 | 11 | — | — | — | — | 13 | — | 9 | 25 | 22 | 48 | — | — | 16 | — | 5 | 28 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 500 | 241 | 251 | 0 | 0 | 1269 | 241 | 25 | 424 | 25 | 7 | 1073 | 541 | 0 | 1059 | 521 | 241 | 1059 | 792 |
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.











