Mary Bay Weather Forecast

    • 15
    • 22

    Shower or two

    • 12
    • 19

    Showers

    • 15
    • 22

    Showers increasing

    • 16
    • 25

    Showers. Possible afternoon storm

    • 16
    • 23

    Shower or two

    • 15
    • 26

    Possible shower

    • 17
    • 30

    Partly cloudy

Today 20 Nov Illawarra

Cloudy. High chance of showers, most likely in the late afternoon and evening. The chance of a thunderstorm in the afternoon and early evening. Winds northeast to southeasterly 15 to 20 km/h tending south to southeasterly 20 to 30 km/h in the middle of the day. Daytime maximum temperatures 21 to 28.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southerly 15 to 20 knots.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Northeasterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres around midday.
Weather
Cloudy. 50% chance of showers. The chance of a thunderstorm in the late afternoon and evening.
Weather Situation
A high pressure system will direct fresh to strong northeasterly winds along the northern coast today. A trough will also brush the central coasts today, bringing a south to southeasterly wind change to the southern and central coasts, before stalling about Hunter or Mid North Coast on Friday. Winds tending east to northeasterly again over the weekend as another high moves into the Tasman Sea and a trough lingers about the coast.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mary Bay Temperature Statistics View More

November Temperature

Point Perpendicular (13km)

  • Lowest 12 November, 2025

    11 °C

  • Average November

    18.5 °C

  • Highest 16 November, 2025

    28.5 °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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