Mount Martha South Beach Weather Forecast

    • 9
    • 15

    Partly cloudy

    • 3
    • 17

    Sunny

    • 4
    • 20

    Sunny

    • 8
    • 25

    Partly cloudy

    • 15
    • 25

    Possible shower

    • 11
    • 18

    Shower or two

    • 9
    • 21

    Partly cloudy

Today 21 Sep Mornington Peninsula

Slight chance of a shower, most likely in the early morning. Mostly sunny afternoon. Winds westerly 25 to 35 km/h turning south to southwesterly 15 to 25 km/h during the morning and early afternoon.

Port Phillip Local Waters

Wind
Westerly 15 to 20 knots, reaching up to 25 knots in the south early in the morning. Winds turning southerly 10 to 15 knots in the late morning and early afternoon.
Seas
1 to 1.5 metres, decreasing to 1 metre during the afternoon.
Weather
Partly cloudy.
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Mount Martha South Beach Temperature Statistics View More

September Temperature

Cerberus (18km)

  • Lowest 18 September, 2026

    2.4 °C

  • Average September

    13.3 °C

  • Highest 13 September, 2026

    25.6 °C

Climate (2021–2026)

Cerberus (18km)

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  • Average Low 2021–2026

    10.2 °C

  • Average 2021–2026

    14.6 °C

  • Average High 2021–2026

    19.7 °C
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