Boat Harbour Weather Forecast

    • 18
    • 34

    Possible shower

    • 19
    • 32

    Showers. Possible storm

    • 18
    • 32

    Showers. Possible storm

    • 20
    • 28

    Possible shower

    • 16
    • 29

    Shower or two

    • 16
    • 30

    Shower or two

    • 16
    • 23

    Shower or two

Today 19 Dec Illawarra

Partly cloudy. Medium chance of showers, most likely in the late afternoon and evening. The chance of a thunderstorm in the afternoon and evening. Winds west to southwesterly 15 to 25 km/h tending southeast to southwesterly in the middle of the day then becoming light in the late evening. Daytime maximum temperatures 34 to 39.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Variable about 10 knots becoming south to southwesterly 10 to 15 knots in the late afternoon.
Seas
Below 1 metre.
1st Swell
Northeasterly 1 to 1.5 metres, decreasing to around 1 metre during the afternoon.
Weather
Partly cloudy. The chance of a thunderstorm inshore in the afternoon and evening.
Weather Situation
A high in the Tasman Sea is directing northerly winds over Coastal Waters. A weak trough will bring a brief southerly change to much of the coast today, before winds turn northerly again over the weekend. Following this, a cold front will bring a fresh to strong southerly change later on Sunday or Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Boat Harbour Temperature Statistics View More

December Temperature

Point Perpendicular (2km)

  • Lowest 2 December, 2025

    10.3 °C

  • Average December

    20 °C

  • Highest 5 December, 2025

    33 °C

Climate (2020–Present)

Point Perpendicular (2km)

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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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