Cap Island Weather Forecast

    • 10
    • 15

    Sunny

    • 12
    • 18

    Sunny

    • 15
    • 20

    Sunny

    • 16
    • 19

    Windy

    • 14
    • 15

    Cloudy

    • 12
    • 16

    Sunny

    • 14
    • 19

    Partly cloudy

Today 17 Sep West Coast

Sunny. Winds northeasterly 15 to 25 km/h becoming light in the evening then becoming northeasterly 15 to 20 km/h in the late evening. Daytime maximum temperatures in the low to mid 20s.

Lower West Coastal Waters

Elliston to Cape Carnot
Wind
Northeasterly 10 to 15 knots becoming variable about 10 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Sunny.
Weather Situation
A strong high pressure system south of the state will maintain a ridge across SA for the next few days as it drifts eastwards, to be located over NSW from Friday. A cold front is then likely to approach from the west late Saturday and move across SA on Sunday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cap Island Temperature Statistics View More

September Temperature

Cummins Airport (64km)

  • Lowest 8 September, 2026

    2.4 °C

  • Average September

    12.7 °C

  • Highest 12 September, 2026

    25.5 °C

Climate (2021–2026)

Cummins Airport (64km)

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  • Average Low 2021–2026

    9.7 °C

  • Average 2021–2026

    15.7 °C

  • Average High 2021–2026

    22.9 °C
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