William Bay Weather Forecast

    • 19
    • 38

    Possible shower or storm

    • 17
    • 30

    Mostly sunny

    • 16
    • 24

    Shower or two

    • 15
    • 22

    Cloudy

    • 13
    • 25

    Partly cloudy

    • 13
    • 20

    Shower or two

    • 12
    • 21

    Partly cloudy

Today 15 Dec South Coastal

Partly cloudy. Slight chance of a shower in the afternoon and early evening. The chance of a thunderstorm in the morning and afternoon, possibly severe with damaging winds and heavy rain which may lead to flash flooding in the afternoon. Winds northeasterly 25 to 35 km/h tending northwest to northeasterly 25 to 40 km/h in the morning then decreasing to 15 to 20 km/h in the evening. Daytime maximum temperatures around 40.

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  • Temperature Forecast Bureau of Meteorology

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William Bay Temperature Statistics View More

December Temperature

North Walpole (46km)

  • Lowest 1 December, 2025

    11.4 °C
  • Average December

    17.6 °C
  • Highest 1 December, 2025

    32.5 °C

Climate (2020–Present)

North Walpole (46km)

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  • Average Low 2020–2025

    11.9 °C
  • Average 2020–2025

    15.4 °C
  • Average High 2020–2025

    20.6 °C
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