Macs Beach Offshore Weather Forecast

    • 17
    • 21

    Partly cloudy

    • 19
    • 21

    Shower

    • 16
    • 19

    Cloudy

    • 17
    • 18

    Partly cloudy

    • 16
    • 19

    Partly cloudy

    • 16
    • 19

    Windy

    • 17
    • 22

    Sunny

Today 20 Dec Yorke Peninsula

Mostly sunny. Medium chance of showers in the south, slight chance elsewhere. Winds southeast to southwesterly 20 to 30 km/h becoming southeasterly 15 to 25 km/h in the evening. Daytime maximum temperatures 25 to 31.

Gulf St Vincent Coastal Waters

Wind
South to southeasterly 15 to 20 knots.
Seas
Around 1 metre.
1st Swell
West to southwesterly below 0.5 metres.
Weather
Partly cloudy.
Weather Situation
A broad trough of low pressure lies over east and northern parts of the State. This area of low pressure is expected to linger over the northeast today before moving east Sunday with the next low pressure system that develops south of the bight. A high pressure ridge then extends over the west and south during Sunday, and throughout by Monday. A persistent high pressure ridge remains over the State and Coastal Waters during Tuesday and Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Macs Beach Offshore Temperature Statistics View More

December Temperature

Roseworthy (57km)

  • Lowest 7 December, 2025

    4.4 °C

  • Average December

    21.9 °C

  • Highest 18 December, 2025

    42.6 °C

Climate (2020–Present)

Roseworthy (57km)

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  • Average Low 2020–2025

    9.7 °C

  • Average 2020–2025

    16.2 °C

  • Average High 2020–2025

    23.6 °C
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