
Surf Forecasts:
Secret Harbour surf forecast from 27 Jul 2026:
- Best quality surf: Saturday 1 Aug, 8AM (local time) - 10ft (3.0m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 3 Aug, 11PM (local time) - 8ft (2.5m), 20s period, WSW swell with 4,642 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 2AM (local time) - 6ft (1.9m), 14s period with WSW swell.
Best Forecast Surf Conditions for Secret Harbour this week:
The surf forecast for Secret Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 28) at 2AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.1m and 24s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Secret Harbour in the next 16 days are 2.5m 20s and forecast to arrive on Monday (Aug 03) at 11PM. Winds are predicted to be onshore 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 (Jul 30) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 28th Jul) | 6ft (1.9m) 14s |
| Best Surf | 8AM (Sat 1st Aug) | 10ft (3.0m) 16s |
| Most Powerful | 11PM (Mon 3rd Aug) | 8ft (2.5m) 20s |
Table - best surf conditions forecast for Secret Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve got a solid look at Secret Harbour stretching out over the next couple of weeks, and there’s plenty to talk about.
First thing to note: the water temp is sitting about average for this time of year, so no weird surprises on that front.
The first window of action kicks off Tuesday the 28th of July. It’s a bit of a mixed bag to start. Tuesday morning is the pick of the early days with a clean 6ft swell from the WSW, a 14-second period, and a light offshore breeze from the east. The combined energy is pumping at 1313 (moderate wave energy), but this is only for experienced surfers – it’s a sandbar setup that can get a bit feisty. The afternoon goes cross-on with a light breeze, so it gets a little messy.
Wednesday the 29th and Thursday the 30th offer cleaner conditions but the swell drops off. Wednesday morning has a 4ft WSW swell with a cross-off wind, but it’s a bit choppy. Wednesday afternoon is a beauty though – glassy clean with a 3ft WSW swell, 17-second period, and a light offshore breeze. Very good surf, but tiny. Thursday morning holds a 4ft swell with a cross-off wind, also clean.
Friday the 31st sees the swell bump up to 6ft in the morning with a clean cross-off breeze, but the afternoon gets blown out with a strong cross-on wind and a 8ft swell – messy and choppy.
Now, the real standout. Saturday the 1st of August. The morning is the best session on offer, no question. You’ve got a solid 10ft swell from the WSW, 15-second period, clean with a light offshore cross-off breeze from the ESE. The combined energy hits 4149 (strong wave energy). This is a big, powerful, clean groundswell. It’s for experienced surfers only – 10ft is too big for beginners. The afternoon is still 10ft but goes cross-on, so it’s not as clean.
Sunday the 2nd of August is a step down but still excellent for experienced surfers: 7ft, clean, cross-off breeze in the morning. Good energy at 1581.
Monday the 3rd of August serves up a glassy morning with 5ft swell and a 14-second period – clean, smooth, and super fun. The afternoon goes cross-on and choppy.
Tuesday the 4th through to the end of the first week sees a building swell, but the wind is a problem. It’s onshore and messy. A lot of these days are blown out, especially the afternoon sessions. By Thursday the 6th, the swell is up to 12ft with a 22-second period, but it’s a strong cross-on mess with 25 mph winds. That’s kite-surfing territory, not paddle surfing.
The weekend of the 8th and 9th of August is a write-off: onshore winds, huge swell between 13ft and 15ft, and terrible conditions. The combined energy is through the roof (over 8500), but it’s a total washout. Not for surfing.
The forecast improves for the second week. Monday the 10th of August gives a clean morning with 8ft WSW swell, 11-second period, and a cross-off breeze. That’s a good option for experienced surfers. The afternoon goes cross-on again.
Tuesday the 11th of August drops to 6ft, clean in the morning, but the afternoon is a cross-shore chop. By Wednesday the 12th, a near gale from the west at 34 mph blows it out completely.
So, the standout for the whole outlook is the morning of Saturday the 1st of August. Big, clean, powerful groundswell at Secret Harbour. The other highlight is the glassy morning of Monday the 3rd of August for a more manageable size. Remember, Secret Harbour is a consistent sandbar, and it can get crowded sometimes, so plan accordingly.
Rusty signing off.
Short Range ForecastMostly dry. Very mild (max 18°C on Wed afternoon, min 11°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Very mild (max 19°C on Sun afternoon, min 11°C on Sun morning). Wind will be generally light. | ||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 17 | WSW 16 | WSW 16 | WSW 14 | WSW 18 | WSW 16 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 13 |
Wave Graph | |||||||||||||||||||
1455 | 1223 | 917 | 841 | 662 | 487 | 333 | 546 | 478 | 1464 | 1656 | 2981 | 2160 | 4149 | 3746 | 2634 | 1581 | 1230 | 854 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-on | off | cross-off | off | off | cross-off | cross | cross-off | cross-off | cross-on | cross | cross-off | cross-on | off | cross-off | cross-on | cross-off |
High Tide | 8:17AM1.00m | 8:56AM1.02m | 9:33AM1.03m | 10:08AM1.02m | 00:56AM0.68m | 10:41AM0.98m | 00:44AM0.71m | 11:13AM0.91m | 00:46AM0.76m | ||||||||||
Low Tide | 5:12PM0.34m | 5:32PM0.37m | 5:52PM0.42m | 6:09PM0.48m | 3:09AM0.67m | 6:19PM0.53m | 4:16AM0.67m | 6:18PM0.58m | |||||||||||
— | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | |
5:36 | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — |
Temp °C | 14 | 13 | 15 | 15 | 14 | 18 | 17 | 15 | 17 | 17 | 16 | 18 | 18 | 13 | 16 | 16 | 15 | 19 | 17 |
Feels °C | 10 | 10 | 13 | 12 | 9 | 15 | 13 | 11 | 15 | 16 | 13 | 15 | 15 | 10 | 14 | 13 | 12 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 16 | WSW 14 | WSW 18 | WSW 16 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 13 |
1455 | 1223 | 917 | 841 | 662 | 414 | 222 | 546 | 478 | 1464 | 1656 | 2981 | 2160 | 4149 | 3746 | 2634 | 1581 | 1230 | 854 | |
Swell 2 Height (m) Direction Period (s) | W 24 | WSW 21 | W 20 | WSW 19 | WSW 18 | WSW 17 | WSW 16 | WSW 21 | W 20 | — | — | — | — | — | — | — | — | — | W 26 |
11 | 90 | 200 | 391 | 418 | 487 | 333 | 87 | 373 | — | — | — | — | — | — | — | — | — | 14 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 24 | — | N 4 | — | — | — | — | — | — | — | — | — | W 26 |
— | — | — | — | — | — | 11 | — | 10 | — | — | — | — | — | — | — | — | — | 14 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 3 | NE 3 | — | NE 3 | N 4 | — | — | N 3 | NW 4 | WSW 7 | — | — | — | — | — | S 4 |
— | — | — | 2 | 4 | — | 4 | 17 | — | — | 6 | 25 | 350 | — | — | — | — | — | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 21 | 0 | 49 | 0 | 0 | 0 | 46 | 0 | 167 | 328 | 101 | 0 | 21 | 0 | 0 | 50 | 0 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Secret Harbour Surf forecast
The above surf forecast table for Secret Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Secret Harbour can be found by selecting the local surf guide option on the grey menu. Our Secret Harbour 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 (Secret Harbour) 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 Secret Harbour 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.
Secret Harbour is 13 km (8 miles) from Mandurah. If you plan a holiday in Perth City Coast, look for hotels and other accommodation in Mandurah. Mandurah has rooms for a wide range of budgets as well as car hire and transport links.










