Semi-detached Point Weather Forecast

    • 18
    • 28

    Shower or two. Windy

    • 14
    • 17

    Showers increasing

    • 14
    • 20

    Showers easing

    • 16
    • 23

    Partly cloudy

    • 14
    • 26

    Sunny

    • 16
    • 29

    Mostly sunny

    • 15
    • 21

    Cloudy

Today 21 Sep Sydney

Becoming cloudy. Medium chance of showers, most likely in the afternoon and evening. The chance of a thunderstorm in the outer west in the afternoon and evening. Winds south to southwesterly 15 to 25 km/h tending south to southeasterly 25 to 40 km/h in the middle of the day then becoming southerly 15 to 25 km/h in the late evening.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southerly 20 to 25 knots, reaching up to 30 knots in the late afternoon.
Seas
1 to 1.5 metres, increasing to 2 to 2.5 metres around midday.
1st Swell
Southerly 1 to 2 metres, increasing to 2 to 3 metres during the afternoon.
Weather
Partly cloudy.
Weather Situation
A high pressure system over the Tasman Sea directs a northwesterly flow over much of the state, with a fresh and gusty southerly change moving across the coastal waters today, reaching the QLD border by Tuesday. A second high pressure system is forecast to slip south and enter the Tasman Sea by mid-week, turning the winds east to northeasterly.
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  • Temperature Forecast Bureau of Meteorology

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Semi-detached Point Temperature Statistics View More

September Temperature

Bellambi (23km)

  • Lowest 16 September, 2026

    9.2 °C

  • Average September

    17.2 °C

  • Highest 5 September, 2026

    30.7 °C

Climate (2021–2026)

Bellambi (23km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18 °C

  • Average High 2021–2026

    21.8 °C
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