Mary Bay Weather Forecast

    • 10
    • 19

    Shower or two

    • 12
    • 19

    Showers easing

    • 13
    • 21

    Showers increasing

    • 13
    • 21

    Shower or two

    • 13
    • 21

    Shower or two

    • 12
    • 20

    Showers

    • 11
    • 19

    Shower or two

Today 21 May Illawarra

Partly cloudy. Medium chance of showers along the coastal fringe, slight chance elsewhere. Winds south to southeasterly 15 to 25 km/h becoming light in the evening.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southerly 15 to 20 knots, reaching up to 25 knots north of Port Kembla during the afternoon and evening.
Seas
1.5 to 2 metres.
1st Swell
Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Cloudy. 70% chance of showers.
Weather Situation
A high pressure system is drifting across southeastern Australia, while a low lingers offshore over the Tasman Sea whipping fresh to strong southerly winds and large powerful waves along much of the coastline. Winds will generally turn east to northeasterly as the low moves eastwards and a ridge builds over the coastal waters from late Saturday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mary Bay Temperature Statistics View More

May Temperature

Point Perpendicular (13km)

  • Lowest 8 May, 2026

    10.6 °C

  • Average May

    17.3 °C

  • Highest 2 May, 2026

    23.9 °C

Climate (2021–Present)

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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