Mary Bay Weather Forecast

    • 19
    • 36

    Wind easing. Partly cloudy

    • 15
    • 21

    Possible morning shower

    • 14
    • 27

    Partly cloudy

    • 15
    • 33

    Sunny

    • 16
    • 26

    Possible shower

    • 16
    • 23

    Shower or two

    • 15
    • 25

    Shower or two

Today 6 Dec Illawarra

Partly cloudy. Slight chance of a shower in the afternoon and evening. The chance of a thunderstorm in the afternoon and early evening, possibly severe with damaging winds. Winds north to northwesterly 15 to 25 km/h turning westerly 25 to 40 km/h in the afternoon. Overnight temperatures falling to between 18 and 22 with daytime temperatures reaching the mid to high 30s.

Extreme Fire Danger Rating

Take action now to protect life and property

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Northerly 15 to 25 knots.
Seas
1 to 2 metres, decreasing to 1 to 1.5 metres during the morning, increasing to 2 metres offshore north of Port Kembla during the afternoon.
1st Swell
Northeasterly around 1 metre, increasing to 1 to 1.5 metres during the morning.
Weather
Partly cloudy. The chance of a thunderstorm in the afternoon and early 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 2 December, 2025

    10.3 °C

  • Average December

    19.7 °C

  • Highest 4 December, 2025

    30.1 °C

Climate (2020–Present)

Point Perpendicular (13km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    17.4 °C

  • Average High 2020–2025

    20.7 °C
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