Mary Bay Weather Forecast

    • 16
    • 27

    Partly cloudy

    • 16
    • 24

    Shower or two

    • 14
    • 24

    Sunny

    • 15
    • 26

    Sunny

    • 15
    • 28

    Sunny

    • 19
    • 36

    Possible shower

    • 20
    • 29

    Possible shower

Today 22 Dec Illawarra

Partly cloudy. Slight chance of a shower. Light winds becoming east to northeasterly 15 to 25 km/h in the middle of the day then becoming light in the late evening. Overnight temperatures falling to between 12 and 17 with daytime temperatures reaching 25 to 30.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southerly 10 to 15 knots becoming variable about 10 knots early in the morning then becoming northeasterly 15 to 20 knots in the middle of the day.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1.5 metres during the morning, then tending southeasterly 1.5 metres around midday.
Weather
Partly cloudy. The chance of a thunderstorm offshore south of Point Perpendicular in the evening.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mary Bay Temperature Statistics View More

December Temperature

Point Perpendicular (13km)

  • Lowest 21 December, 2024

    16 °C

  • Average December

    21.1 °C

  • Highest 7 December, 2024

    33.7 °C

Climate (2019–Present)

Point Perpendicular (13km)

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  • Average Low 2019–2024

    14.7 °C

  • Average 2019–2024

    17.3 °C

  • Average High 2019–2024

    20.6 °C
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