Surf Forecasts:
Secret Harbour surf forecast from 21 Jul 2026:
- Best quality surf: Wednesday 22 Jul, 11AM (local time) - 5ft (1.6m), 13s period, WSW swell with cross-offshore winds.
- Most powerful swell: Sunday 26 Jul, 2PM (local time) - 8ft (2.4m), 16s period, WSW swell with 2,696 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 11PM (local time) - 5.5ft (1.7m), 13s 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 21) at 11PM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.1m and 18s. 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 2.4m 16s and forecast to arrive on Sunday (Jul 26) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Jul 25) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 21st Jul) | 5.5ft (1.7m) 13s |
| Best Surf | 11AM (Wed 22nd Jul) | 5ft (1.6m) 13s |
| Most Powerful | 2PM (Sun 26th Jul) | 8ft (2.4m) 16s |
Table - best surf conditions forecast for Secret Harbour over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get down to it for our local break.
Secret Harbour. The water is running a bit chilly, about 64°, a touch colder than usual for this time of year, so suit up.
We start slow. Tuesday the 21st is a bit of a mess with cross-shore wind and only marginal conditions. Not worth paddling out for. Wednesday morning the 22nd is where it picks up. We’ve got a clean 5ft WSW swell with a solid 13-second period and light cross-offshore wind. The energy is moderate, and it's clean for the experienced crew. Wednesday afternoon gets even better, the swell pumps to 6ft with a long 16-second period, making for powerful, well-shaped waves. The energy jumps up, and it's clean. This is the best of the first week. Thursday the 23rd keeps it going with clean offshore winds in the morning. Swell is a bit smaller at 5ft, but the quality is high. Friday the 24th drops to 3ft, but the wind goes glassy offshore in the afternoon, a sweet little window for a log.
The weekend is a write-off. Saturday the 25th gets messy, and Sunday the 26th is a total loss with strong onshore winds and a lumpy 6ft to 8ft swell. Not a paddle surfer's day. Monday the 27th is still average.
Now for the second week. Tuesday the 28th morning is a gem. The swell is back to a clean 5ft with a 14-second period, and the wind is light cross-offshore. This is a top session. The main event is Friday the 31st of July. The morning is glassy, dead flat calm, with a solid 7ft W swell and a very long 16-second period. The energy is massive. This is a big, powerful groundswell, and it will be breaking clean and lined up. This is the absolute standout for the whole outlook. It's for experts only, that size with that long period is serious.
The weekend of August 1st gets blown out, then it settles. Sunday the 2nd and Monday the 3rd of August both have excellent mornings. Monday sees a strong 7ft swell with a 16-second period and light offshore winds. Another cracker. The run continues through Tuesday the 4th and Wednesday the 5th with clean, offshore surf in the mornings, all around 5ft to 6ft with long periods.
Your best bets are Wednesday the 22nd afternoon, Tuesday the 28th morning, and the absolute must-surf is the glassy, powerful morning of Friday the 31st of July. Get out there.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Thu afternoon, min 12°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Sun afternoon. Very mild (max 18°C on Sat afternoon, min 12°C on Sat morning). Winds increasing (light winds from the NE on Fri afternoon, strong winds from the W by Sun afternoon). | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
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) | SW 11 | WSW 12 | WSW 13 | WSW 16 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 467 | 784 | 837 | 1706 | 1257 | 943 | 659 | 427 | 249 | 226 | 207 | 367 | 431 | 323 | 889 | 2394 | 1748 | 1155 | 880 | 1091 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | off | off | cross-off | cross | cross-off | cross-on | on | on | cross | cross-on | cross-off |
High Tide | 3:13AM0.84m | 4:03AM0.86m | 5:01AM0.88m | 5:58AM0.90m | 6:49AM0.93m | 7:35AM0.97m | ||||||||||||||
Low Tide | 5:32PM0.51m | 5:28PM0.44m | 5:26PM0.39m | 5:18PM0.35m | 5:01PM0.33m | 4:51PM0.32m | 4:57PM0.32m | |||||||||||||
 |  | |  | | | | | |  |  | | |  |  | |  |  | | | |
 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — |
 | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | 3 | 1 | — | — |
Temp °C | 15 | 14 | 13 | 16 | 15 | 13 | 17 | 16 | 13 | 17 | 15 | 14 | 18 | 17 | 16 | 16 | 16 | 15 | 16 | 15 |
Feels °C | 11 | 10 | 9 | 12 | 10 | 9 | 13 | 12 | 8 | 15 | 11 | 9 | 14 | 12 | 10 | 9 | 8 | 9 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 11 | WSW 12 | WSW 13 | WSW 16 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 15 |
| kJ | 467 | 784 | 837 | 1706 | 1257 | 943 | 659 | 427 | 249 | 226 | 207 | 367 | 431 | 323 | 889 | 2394 | 1748 | 1155 | 880 | 1091 |
Swell 2 Height (m) Direction Period (s) | WSW 14 | W 18 | WSW 16 | — | — | — | — | W 18 | W 16 | W 16 | W 15 | — | — | NNW 5 | WSW 16 | — | — | — | W 26 | W 24 |
| kJ | 341 | 6 | 283 | — | — | — | — | 25 | 82 | 81 | 110 | — | — | 8 | 612 | — | — | — | 13 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | N 4 | NNW 5 | — | — | WSW 17 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 2 | 3 | — | — | 54 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | ESE 3 | — | ESE 3 | ENE 3 | — | ENE 3 | NNE 4 | — | NNE 3 | NNW 4 | NW 5 | WSW 6 | — | — | SE 3 | ESE 3 | SE 3 | ESE 4 |
| kJ | — | — | 1 | — | 4 | 3 | — | 3 | 7 | — | 2 | 24 | 41 | 108 | — | — | 4 | 2 | 2 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 101 | 0 | 0 | 0 | 24 | 0 | 0 | 0 | 66 | 0 | 0 | 167 | 57 | 360 | 328 | 328 | 984 | 101 | 101 | 0 |
Best forecast wave conditions in Perth City Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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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.
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