Porpoise Bay Weather Forecast

    • 17
    • 22

    Mostly sunny

    • 18
    • 21

    Showers increasing. Windy

    • 14
    • 19

    Possible morning shower

    • 12
    • 18

    Sunny

    • 13
    • 21

    Mostly sunny

    • 15
    • 22

    Sunny

    • 17
    • 22

    Shower or two

Today 20 May Lower West

Mostly sunny. Winds north to northeasterly 15 to 25 km/h turning northwesterly 15 to 20 km/h in the middle of the day then becoming light in the late afternoon. Daytime maximum temperatures in the low to high 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 10 to 15 knots becoming variable below 10 knots in the middle of the day.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
Weather
Mostly sunny.
Weather Situation
A ridge will persist to the south until a weak cold front moves through during Thursday afternoon and evening. Another ridge develops to the southwest during Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Porpoise Bay Temperature Statistics View More

May Temperature

Swanbourne (22km)

  • Lowest 2 May, 2026

    7.7 °C

  • Average May

    16.1 °C

  • Highest 11 May, 2026

    26.9 °C

Climate (2021–Present)

Swanbourne (22km)

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  • Average Low 2021–2026

    14.5 °C

  • Average 2021–2026

    18.8 °C

  • Average High 2021–2026

    24.2 °C
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