Semi-detached Point Weather Forecast

    • 11
    • 20

    Partly cloudy

    • 11
    • 24

    Shower or two

    • 15
    • 20

    Sunny

    • 9
    • 21

    Partly cloudy

    • 11
    • 22

    Shower or two

    • 11
    • 18

    Shower or two

    • 10
    • 20

    Sunny

Today 18 Sep Sydney

Mostly sunny. Slight chance of a shower along the coastal fringe, near zero chance elsewhere. Light winds becoming northeasterly 15 to 20 km/h in the early afternoon then becoming light in the evening.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southeast to southwesterly 10 to 15 knots tending northeast to southeasterly in the morning then tending north to northeasterly 15 to 20 knots in the middle of the day. Winds reaching up to 25 knots offshore north of Port Kembla in the late evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres offshore by early evening.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
In the wake of a cold front, south to southwesterly winds will tend northerly and strengthen today as a high pressure system drifts across the coastal waters. Winds will shift west to southwesterly again over the weekend as a stronger cold front moves over NSW coastal waters, with southwesterly winds persisting into early next week as a series of fronts brush the south of the state.
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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 1 September, 2025

    9.1 °C

  • Average September

    17.1 °C

  • Highest 8 September, 2025

    28.6 °C

Climate (2020–Present)

Bellambi (23km)

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  • Average Low 2020–2025

    15 °C

  • Average 2020–2025

    17.9 °C

  • Average High 2020–2025

    21.6 °C
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