Blackwattle Bay Marina Weather Forecast

    • 19
    • 31

    Mostly sunny

    • 18
    • 23

    Shower or two

    • 16
    • 22

    Cloudy

    • 16
    • 24

    Partly cloudy

    • 16
    • 25

    Partly cloudy

    • 18
    • 26

    Partly cloudy

    • 16
    • 28

    Partly cloudy

Today 24 Dec Sydney

Mostly sunny. Slight chance of a shower along the coastal fringe later tonight. Near zero chance of rain elsewhere. Winds north to northwesterly 15 to 20 km/h shifting southerly 20 to 30 km/h during the afternoon and evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
North to northwesterly below 10 knots tending northeasterly 15 to 20 knots in the middle of the day then tending southeast to southwesterly in the late evening.
Seas
Below 0.5 metres.
Weather
Mostly sunny.
Weather Situation
Moderate to fresh southeasterly winds lie over Sydney local waters today in the wake of a trough. Winds will briefly turn northerly before a high pressure system builds in the Bight, directing another, stronger, southerly change over Sydney local waters late tonight.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Blackwattle Bay Marina Temperature Statistics View More

December Temperature

Sydney (Observatory Hill) (2km)

  • Lowest 2 December, 2025

    13.3 °C

  • Average December

    23.1 °C

  • Highest 19 December, 2025

    42.2 °C

Climate (2020–Present)

Sydney (Observatory Hill) (2km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.3 °C

  • Average High 2020–2025

    23.5 °C
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