Carnac Island Weather Forecast

    • 15
    • 22

    Showers, early storm. Very windy

    • 13
    • 20

    Showers easing. Wind easing

    • 13
    • 20

    Showers

    • 11
    • 19

    Shower or two

    • 11
    • 19

    Shower or two

    • 10
    • 20

    Possible shower

    • 11
    • 21

    Shower or two

Today 31 May Perth

Cloudy. Very high chance of showers. The chance of a thunderstorm in the early morning, possibly severe with heavy rain which may lead to flash flooding. Damaging winds likely, particularly near the coast and possibly destructive with thunderstorms in the early morning and in the evening. Winds northerly 25 to 35 km/h turning west to northwesterly 40 to 60 km/h early in the morning.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northwesterly 25 to 30 knots turning westerly 30 to 40 knots in the early morning. Winds reaching up to 45 knots during the evening.
Seas
1.5 to 2.5 metres, increasing to 3 to 5 metres during the morning.
1st Swell
Southwesterly around 1 metre, tending westerly 3 to 5 metres during the morning.
Weather
Cloudy. Near 100% chance of showers. The chance of a thunderstorm.
Caution
Large and powerful surf conditions in the afternoon and evening are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing. Tides are likely to rise above the normal high tide mark.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

May Temperature

Garden Island (13km)

  • Lowest 23 May, 2026

    7.7 °C

  • Average May

    16.6 °C

  • Highest 11 May, 2026

    26.2 °C

Climate (2021–Present)

Garden Island (13km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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