Shag Rock Weather Forecast

    • 15
    • 22

    Cloudy

    • 12
    • 18

    Cloudy

    • 5
    • 23

    Sunny

    • 11
    • 29

    Partly cloudy

    • 18
    • 30

    Partly cloudy

    • 15
    • 29

    Partly cloudy

    • 15
    • 29

    Partly cloudy

Today 20 Sep West Coast

Partly cloudy. Slight chance of a shower south of Streaky Bay, near zero chance elsewhere. Winds southwesterly 25 to 35 km/h turning southerly 15 to 20 km/h in the evening.

Upper West Coastal Waters

Fowlers Bay to Elliston
Wind
Southwesterly 10 to 15 knots, reaching up to 20 knots south of Streaky Bay during the afternoon and evening. Winds turning southerly in the late evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres south of Streaky Bay.
1st Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2.5 metres by early evening.
Weather
Cloudy.
Weather Situation
A trough and cold front will move to the east of SA later Sunday. A high pressure system will move eastwards across waters to the south during Monday then over Victoria and the Tasman Sea on Tuesday. This high will extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday. The trough will slip southeastwards over the Bight during Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Shag Rock Temperature Statistics View More

September Temperature

Streaky Bay (44km)

  • Lowest 17 September, 2026

    3.3 °C

  • Average September

    14.8 °C

  • Highest 18 September, 2026

    27 °C

Climate (2021–2026)

Streaky Bay (44km)

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  • Average Low 2021–2026

    11.8 °C

  • Average 2021–2026

    16.4 °C

  • Average High 2021–2026

    23.6 °C
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