Mary Bay Weather Forecast

    • 7
    • 19

    Partly cloudy

    • 8
    • 19

    Partly cloudy

    • 7
    • 21

    Sunny

    • 8
    • 22

    Mostly sunny

    • 9
    • 25

    Sunny

    • 13
    • 25

    Mostly sunny

    • 11
    • 23

    Partly cloudy

Today 28 Aug Illawarra

Sunny. Winds northwest to southwesterly 15 to 20 km/h tending southeast to southwesterly 15 to 25 km/h in the middle of the day then becoming light in the evening. Overnight temperatures falling to between 4 and 8 with daytime temperatures reaching between 17 and 21.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
West to northwesterly 10 to 15 knots shifting southerly in the late morning and early afternoon. Winds reaching up to 20 knots inshore in the late afternoon.
Seas
Around 1 metre.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Weather
Mostly sunny.
Weather Situation
Fresh southerly wind persists in the wake of a trough, now lying offshore. Winds will then ease later in the week as a high pressure ridge develops across the coastal waters.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mary Bay Temperature Statistics View More

August Temperature

Point Perpendicular (13km)

  • Lowest 8 August, 2026

    7.7 °C

  • Average August

    14.2 °C

  • Highest 3 August, 2026

    21.1 °C

Climate (2021–2026)

Point Perpendicular (13km)

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  • Average Low 2021–2026

    14.8 °C

  • Average 2021–2026

    17.5 °C

  • Average High 2021–2026

    20.8 °C
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