Surf Forecasts:
Secret Harbour surf forecast from 12 Jul 2026:
- Best quality surf: Sunday 12 Jul, 11PM (local time) - 7ft (2.2m), 18s period, WSW swell with cross-offshore winds.
- Most powerful swell: Saturday 18 Jul, 8AM (local time) - 15ft (4.5m), 19s period, W swell with 13,265 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 11PM (local time) - 7ft (2.2m), 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 Sunday (Jul 12) at 11PM. The primary swell is predicted to be 2.2m 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 4.5m 19s and forecast to arrive on Saturday (Jul 18) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Wednesday (Jul 15) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 12th Jul) | 7ft (2.2m) 18s |
| Best Surf | 11PM (Sun 12th Jul) | 7ft (2.2m) 18s |
| Most Powerful | 8AM (Sat 18th Jul) | 15ft (4.5m) 19s |
Table - best surf conditions forecast for Secret Harbour over the next 16 days.
Alright, mate, let’s talk about Secret Harbour. It’s a sandbar set-up, exposed to the swell, and it’s been consistent, so there’s hope. But we’ve got a bit of a wait before the real fun gets going.
The water temp is around 66°, which is about average for the season – nothing unusual there.
The first real standout is Monday morning, July 13th. Swell is a solid 7ft from the WSW, with a nice long 17-second period, pushing a heap of energy (2687). That’s groundswell, and it’s going to be powerful. The wind is a clean ESE cross-off, so it’s going to be glassy and clean. This is a proper morning. It’s a bit big for beginners – over 5ft and heading for 7ft – so you want to be experienced.
Then, Tuesday, July 14th is a beauty. Both morning and afternoon are looking clean with offshore winds from the NE and ENE. Swell drops a touch to 6ft and 6ft, same WSW direction, but the period stays solid at 15 seconds. That’s good, clean, shoulder-to-head-high surf with a bit of push. A cracking day to be out.
There’s a bit of a lull mid-week, but then Thursday morning, July 23rd looks like a big one. The swell jumps to 12ft from the WSW, period 14 seconds, with massive energy (5440). That’s expert territory – over 8ft is big, heavy, and not for the faint-hearted. The wind is a moderate cross-shore, so it’s not perfect, but it’s going to be a proper session for the experienced crew.
The last proper highlight is Friday morning, July 24th. Another clean one with a light ESE cross-off, 8ft swell from the WSW with a 16-second period (2793 energy). That’s a solid, clean, powerful wave. Again, not for beginners, but for the keen ones, it’s a morning to circle.
There’s a long gap in the second week, especially from the 26th, where the swell drops right off and the wind turns onshore. Not much to talk about there.
For the best on offer: Monday morning, July 13th and Tuesday, July 14th are your clean, punchy windows. If you’re chasing something bigger, Thursday morning, July 23rd is the big one, but it’s rough and ready. The Friday morning, July 24th is another clean, solid option.
Stay safe out there.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Tue afternoon, min 11°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 32mm), heaviest during Thu afternoon. Warm (max 22°C on Wed afternoon, min 14°C on Sat morning). Winds increasing (calm on Fri morning, near gales from the W by Sat morning). | ||||||||||||||||||||
Sun 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | WSW 15 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | W 16 | WSW 16 | WSW 15 | W 14 | W 13 | W 12 | WSW 13 | W 14 | W 18 | W 16 | W 15 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1091 | 3443 | 2680 | 2226 | 1696 | 1546 | 1330 | 1143 | 691 | 790 | 1208 | 1822 | 1949 | 1999 | 1118 | 847 | 3551 | 12856 | 11418 | 5934 | 2990 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-on | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-on | cross-on | on | on | on | on |
High Tide | 8:21AM1.09m | 9:12AM1.10m | 9:58AM1.09m | 10:38AM1.05m | 11:10AM0.98m | 11:28AM0.90m | 2:25AM0.72m | 11:11AM0.81m | |||||||||||||
Low Tide | 5:10PM0.26m | 5:50PM0.26m | 6:28PM0.30m | 7:04PM0.37m | 7:32PM0.45m | 7:46PM0.53m | 7:27PM0.59m | 4:17AM0.72m | |||||||||||||
 |  |  | |  | | | | | | |  |  |  |  |  |  |  | |  | | |
 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 |
 | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | 5:30 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 10 | 2 | 3 | 8 | 3 | 2 | 2 | 2 |
Temp °C | 15 | 15 | 13 | 15 | 14 | 13 | 19 | 18 | 18 | 22 | 20 | 18 | 19 | 18 | 17 | 18 | 18 | 14 | 15 | 15 | 15 |
Feels °C | 13 | 13 | 10 | 13 | 11 | 10 | 16 | 13 | 11 | 19 | 17 | 15 | 16 | 14 | 18 | 13 | 11 | 2 | 5 | 8 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | W 16 | WSW 16 | WSW 15 | W 14 | — | W 12 | WSW 13 | — | — | — | — | WSW 14 |
| kJ | 1091 | 3443 | 2680 | 2226 | 1696 | 1546 | 1330 | 1143 | 691 | 790 | 1208 | 1822 | 1949 | — | 1118 | 847 | — | — | — | — | 2990 |
Swell 2 Height (m) Direction Period (s) | WSW 18 | — | NW 13 | NW 13 | NW 13 | NW 13 | — | NW 14 | WSW 18 | WSW 13 | WNW 13 | WNW 13 | WNW 12 | — | NW 12 | — | — | — | — | — | — |
| kJ | 700 | — | 7 | 7 | 7 | 7 | — | 7 | 422 | 373 | 17 | 17 | 14 | — | 5 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | NW 14 | — | — | — | — | — | — | — | WNW 14 | WNW 14 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | — | — | — | — | — | — | — | 19 | 18 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NNE 4 | N 6 | NNW 6 | NW 6 | NNW 6 | NNW 6 | W 13 | — | NW 4 | W 14 | W 18 | W 16 | W 15 | — |
| kJ | — | — | — | — | — | — | — | 23 | 119 | 106 | 98 | 108 | 93 | 1999 | — | 34 | 3551 | 12856 | 11418 | 5934 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 0 | 0 | 21 | 0 | 0 | 0 | 0 | 1620 | 66 | 278 | 221 | 307 | 307 | 101 | 307 | 307 | 1184 | 1189 | 369 | 177 |
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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