Jervis Bay Weather Forecast

    • 9
    • 23

    Possible shower developing

    • 14
    • 20

    Sunny

    • 9
    • 21

    Mostly sunny

    • 12
    • 20

    Showers

    • 8
    • 17

    Shower or two

    • 9
    • 20

    Sunny

    • 10
    • 22

    Partly cloudy

Today 19 Sep Illawarra

Sunny morning. Medium chance of showers in the afternoon and evening. Winds west to northwesterly 15 to 20 km/h tending northwest to northeasterly 15 to 25 km/h in the middle of the day then becoming northwesterly 20 to 30 km/h in the early afternoon. Overnight temperatures falling to between 5 and 9 with daytime temperatures reaching the low to mid 20s.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
North to northwesterly 15 to 20 knots tending west to northwesterly before dawn then turning northerly during the morning. Winds reaching up to 25 knots offshore north of Point Perpendicular early in the morning and again in the late evening.
Seas
1 to 2 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres around midday.
1st Swell
Southerly 1 to 1.5 metres, decreasing to around 1 metre during the morning.
Weather
Mostly sunny day. The chance of a thunderstorm offshore in the evening.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Jervis Bay Temperature Statistics View More

September Temperature

Point Perpendicular (8km)

  • Lowest 1 September, 2025

    9.2 °C

  • Average September

    16.1 °C

  • Highest 16 September, 2025

    28 °C

Climate (2020–Present)

Point Perpendicular (8km)

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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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