Secret Harbour Weather Forecast

    • 17
    • 28

    Sunny

    • 14
    • 27

    Sunny

    • 16
    • 29

    Sunny

    • 18
    • 33

    Sunny

    • 21
    • 36

    Sunny

    • 26
    • 37

    Mostly sunny

    • 23
    • 30

    Mostly sunny

Today 20 Dec Mandurah

Cloud clearing. Winds southerly 25 to 35 km/h tending southeasterly 25 to 30 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 20 to 25 knots, reaching up to 30 knots during the afternoon and evening. Winds turning southeasterly 15 to 25 knots in the late evening.
Seas
1.5 metres, increasing to 2 to 2.5 metres during the afternoon.
1st Swell
Southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A ridge over local waters will strengthen tomorrow. A weak front will brush the south coast on Monday, followed by the west coast trough returning by Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Secret Harbour Temperature Statistics View More

December Temperature

Mandurah (13km)

  • Lowest 4 December, 2025

    16.1 °C

  • Average December

    23.3 °C

  • Highest 14 December, 2025

    40.1 °C

Climate (2020–Present)

Mandurah (13km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    15.1 °C

  • Average 2020–2025

    19.2 °C

  • Average High 2020–2025

    23.8 °C
Get WillyWeather+ to remove ads