Nepean Bay Weather Forecast

    • 9
    • 14

    Shower

    • 5
    • 15

    Partly cloudy

    • 8
    • 13

    Shower

    • 8
    • 15

    Cloudy

    • 6
    • 15

    Partly cloudy

    • 7
    • 20

    Partly cloudy

    • 11
    • 21

    Shower

Today 7 Sep Central

Cloudy. High chance of showers in the east, medium chance elsewhere. Winds westerly 15 to 20 km/h turning southerly 20 to 30 km/h in the late morning. Overnight temperatures falling to between 5 and 9 with daytime temperatures reaching between 10 and 14.

Port Phillip Local Waters

Wind
Westerly 15 to 20 knots turning southerly 15 to 25 knots in the late morning then decreasing to 10 to 15 knots in the evening. Winds reaching up to 30 knots in the late morning and early afternoon.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing below 1 metre later in the evening.
Weather
Partly cloudy. 70% chance of showers in the morning.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Nepean Bay Temperature Statistics View More

September Temperature

Avalon Airport (35km)

  • Lowest 1 September, 2026

    4 °C

  • Average September

    13 °C

  • Highest 1 September, 2026

    21.8 °C

Climate (2021–2026)

Avalon Airport (35km)

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  • Average Low 2021–2026

    9.8 °C

  • Average 2021–2026

    14.6 °C

  • Average High 2021–2026

    20.6 °C
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