Mosman Bay Weather Forecast

    • 14
    • 18

    Showers

    • 14
    • 20

    Cloudy

    • 12
    • 22

    Cloud clearing

    • 13
    • 25

    Sunny

    • 15
    • 28

    Sunny

    • 18
    • 27

    Showers

    • 15
    • 21

    Showers

Today 27 Sep Sydney

Cloudy. Very high chance of showers, most likely in the late morning and afternoon. Winds south to southeasterly 20 to 30 km/h.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Southerly 15 to 20 knots shifting south to southeasterly 20 to 30 knots in the middle of the day then tending southeasterly 15 to 20 knots in the evening.
Seas
Below 0.5 metres.
Weather
Cloudy. 95% chance of showers.
Weather Situation
A ridge of high pressure will build over coastal waters in the wake of a southerly change. A high pressure centre will move across Tasmania early next week, turning winds east to northeasterly over the Sydney Waters for the early days of the week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mosman Bay Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (3km)

  • Lowest 18 September, 2026

    9.4 °C

  • Average September

    17.9 °C

  • Highest 21 September, 2026

    32.7 °C

Climate (2021–2026)

Sydney (Observatory Hill) (3km)

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  • Average Low 2021–2026

    14.9 °C

  • Average 2021–2026

    18.5 °C

  • Average High 2021–2026

    23.6 °C
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