Jervis Bay Harbour Weather Forecast

    • 17
    • 29

    Shower or two. Possible storm

    • 18
    • 25

    Cloudy

    • 17
    • 27

    Partly cloudy

    • 17
    • 32

    Mostly sunny

    • 20
    • 36

    Sunny

    • 20
    • 36

    Sunny

    • 20
    • 38

    Sunny

Today 4 Jan Illawarra

Partly cloudy. High chance of showers, most likely in the afternoon and early evening. A thunderstorm likely, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding inland in the afternoon and early evening. Winds northwest to northeasterly 15 to 20 km/h becoming light before dawn. Overnight temperatures falling to between 14 and 18 with daytime temperatures reaching around 30.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
North to northeasterly 15 to 20 knots, reaching up to 25 knots offshore north of Port Kembla during the morning. Winds tending north to northwesterly 10 to 15 knots in the evening then becoming variable about 10 knots in the late evening.
Seas
1.5 to 2 metres, decreasing below 1.5 metres during the morning, then decreasing to 1 metre around midday.
1st Swell
Northeast to southeasterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore north of Point Perpendicular during the morning.
Weather
Partly cloudy. 50% chance of showers. The chance of a thunderstorm.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Jervis Bay Harbour Temperature Statistics View More

January Temperature

Point Perpendicular (9km)

  • Lowest 1 January, 2026

    16.1 °C

  • Average January

    17.8 °C

  • Highest 1 January, 2026

    19.9 °C

Climate (2021–Present)

Point Perpendicular (9km)

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  • Average Low 2021–2026

    14.7 °C

  • Average 2021–2026

    17.4 °C

  • Average High 2021–2026

    20.7 °C
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