
Surf Forecasts:
Secret Harbour surf forecast from 30 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 11AM (local time) - 10ft (3.0m), 16s period, WSW swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 2AM (local time) - 10ft (3.0m), 15s period, W swell with 4,475 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 5AM (local time) - 5ft (1.6m), 18s 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 Friday (Jul 31) at 5AM. The primary swell is predicted to be 1.6m and 18s period. 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 3.0m 15s and forecast to arrive on Friday (Aug 07) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Friday (Jul 31) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 31st Jul) | 5ft (1.6m) 18s |
| Best Surf | 11AM (Wed 5th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 2AM (Fri 7th Aug) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Secret Harbour over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. We’ve got the full 16-day outlook for Secret Harbour, so let’s paddle out and see what’s cookin’.
Overall, the pattern is a slow burn. The first few days are a bit of a write-off, but we’ve got some serious standouts on the horizon. The water temp is sitting about average for this time of year, so nothing crazy there.
The week kicks off with a bit of a bust. Friday the 31st and Saturday the 1st are looking rough with cross-offshore and cross-shore winds, messy conditions, and moderate wave energy. The swell is there, but it’s not clean. You’re better off staying on the beach.
Things start to turn around on Sunday the 2nd. We’ve got a solid 7ft swell from the WSW, with a 14-second period, and the wind goes offshore in the morning. That’s a proper session. Then, in the afternoon, it goes glassy with a 6ft swell. That’s clean, fun surf. The energy is moderate, but it’s got some push. This is a solid window for experienced surfers.
Monday the 3rd keeps the good vibes going with a glassy morning and 5ft swell. It’s a bit smaller but still fun. The energy is lighter.
Tuesday the 4th and Wednesday the 5th are a mixed bag. Tuesday gets blown out with onshore winds, but the swell is pumping at 8ft with a very long 18-second period. Not worth it. Wednesday the 5th, however, is a standout. Wednesday morning is the real deal. We’ve got a 10ft groundswell from the WSW, a 16-second period, and it’s glassy. The combined energy is huge. That’s strong, powerful surf. It’s for experts only, but it will be excellent. The afternoon gets a bit messy with cross-on winds, so get on it early.
Thursday the 6th is a washout again with strong winds, and Friday the 7th sees a massive 15ft swell but with atrocious onshore winds. That’s a complete no-go.
The weekend of the 8th and 9th is a write-off. After that, the conditions are so poor or the swell is too big with bad wind that it’s not worth looking at until the end of the period.
Now, if you’ve got patience, the real gem is Wednesday the 12th of August. This is the standout of the entire outlook. The early morning session is a dream. We’ve got an 12ft groundswell from the WSW, a very long 19-second period, and it’s glassy. The wind is calm. The combined energy is massive. That’s some serious power. This is an exceptional day for expert surfers. The afternoon is still good with an 12ft swell and light cross-on wind, but the morning is the magic hour.
Thursday the 13th morning is also fantastic for experts with a 10ft swell, 18-second period, and cross-offshore winds. Energy is high. Another great session.
The last few days of the window are a fade-out. Friday the 14th and Saturday the 15th are marginal with cross-shore winds and strong breezes, so it’s time to hang up the board.
So, to sum it up: the best on offer is Wednesday morning the 12th of August for the big, glassy, powerful groundswell. The next best is Sunday the 2nd and Wednesday the 5th for cleaner, more manageable conditions. The rest is a waiting game.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Very mild (max 19°C on Fri afternoon, min 8°C on Sun morning). Winds increasing (calm on Thu night, fresh winds from the SW by Fri night). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue morning. Very mild (max 17°C on Tue morning, min 11°C on Mon morning). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 18 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 16 | WSW 15 | WSW 18 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 |
Wave Graph | |||||||||||||||||||
1464 | 1464 | 2271 | 1913 | 2474 | 2738 | 2550 | 1487 | 1249 | 905 | 800 | 806 | 1001 | 3713 | 2947 | 1886 | 4161 | 3752 | 3216 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off | off | glassy | off | glassy | cross-on | on | on | on | on | glassy | cross-on | cross-off |
High Tide | 10:08AM1.02m | 00:56AM0.68m | 10:41AM0.98m | 00:44AM0.71m | 11:13AM0.91m | 00:46AM0.76m | 11:39AM0.81m | 1:02AM0.80m | 11:42AM0.69m | 1:34AM0.84m | 2:25AM0.87m | ||||||||
Low Tide | 6:09PM0.48m | 3:09AM0.67m | 6:19PM0.53m | 4:16AM0.67m | 6:18PM0.58m | 5:25AM0.66m | 6:05PM0.60m | 7:00AM0.66m | 5:38PM0.58m | 4:54PM0.52m | |||||||||
— | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | |
5:37 | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | |
mm | — | — | — | 3 | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 2 | 2 | 1 |
Temp °C | 18 | 16 | 19 | 19 | 13 | 14 | 13 | 12 | 17 | 15 | 13 | 15 | 15 | 17 | 16 | 16 | 15 | 16 | 16 |
Feels °C | 18 | 12 | 14 | 14 | 8 | 9 | 8 | 7 | 15 | 11 | 11 | 12 | 12 | 14 | 12 | 12 | 14 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 18 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 16 | WSW 15 | WSW 18 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 |
1464 | 1464 | 2271 | 1913 | 2474 | 2738 | 2550 | 1487 | 1249 | 905 | 800 | 806 | 1001 | 3713 | 2947 | 1886 | 4161 | 3752 | 3216 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 16 | — | W 24 | WSW 20 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 129 | — | 11 | 700 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | N 3 | NW 4 | SW 7 | — | — | — | NE 3 | — | — | — | — | — | — | — | WSW 5 | — | — | — |
— | 8 | 24 | 253 | — | — | — | 4 | — | — | — | — | — | — | — | 46 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 167 | 328 | 345 | 101 | 101 | 24 | 0 | 0 | 0 | 0 | 21 | 46 | 101 | 369 | 345 | 0 | 24 | 66 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











