Cap Island Weather Forecast

    • 19
    • 21

    Shower

    • 17
    • 18

    Sunny

    • 14
    • 17

    Partly cloudy

    • 16
    • 18

    Partly cloudy

    • 16
    • 19

    Sunny

    • 17
    • 19

    Partly cloudy

    • 18
    • 18

    Partly cloudy

Today 31 Mar West Coast

Partly cloudy. Very high chance of showers, most likely during this afternoon and evening. The chance of a thunderstorm, possibly severe with damaging winds and heavy rain which may lead to flash flooding west of Ceduna during this afternoon and evening. Winds northerly 35 to 50 km/h shifting south to southwesterly 20 to 30 km/h in the afternoon. Daytime maximum temperatures around 30.

Lower West Coastal Waters

Elliston to Cape Carnot
Wind
Northerly 15 to 20 knots, reaching up to 25 knots offshore during the morning. Winds turning westerly in the late afternoon.
Seas
1 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1.5 metres.
Weather
Becoming cloudy. 95% chance of showers. The chance of a thunderstorm during this afternoon and evening.
Weather Situation
A high pressure system over the Tasman sea extends a weak ridge over SA. A trough over central WA extends over southwest SA, and is forecast to move across the west and south later Tuesday, pushing into the northeast of SA on Wednesday. Another high pressure system is expected to become established south of the Bight late in the week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cap Island Temperature Statistics View More

March Temperature

Cummins Airport (64km)

  • Lowest 27 March, 2026

    6.7 °C

  • Average March

    19.1 °C

  • Highest 10 March, 2026

    35.2 °C

Climate (2021–Present)

Cummins Airport (64km)

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  • Average Low 2021–2026

    9.5 °C

  • Average 2021–2026

    15.6 °C

  • Average High 2021–2026

    22.9 °C
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