Castlecrag Marine Weather Forecast

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    • 29

    Showers increasing

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    • 25

    Showers

    • 20
    • 26

    Showers

    • 20
    • 27

    Possible shower

    • 19
    • 28

    Partly cloudy

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    Mostly sunny

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    Shower or two

Today 7 Mar Sydney

Cloudy. Very high chance of showers, most likely in the afternoon and evening. The chance of a thunderstorm, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding. Light winds becoming south to southeasterly 15 to 20 km/h in the late afternoon then becoming light in the evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Northeasterly below 10 knots tending easterly 10 to 15 knots in the early afternoon then becoming southeasterly below 10 knots in the evening.
Seas
Below 0.5 metres.
Weather
Cloudy. 80% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Weather Situation
A high pressure system over the Tasman Sea is extending a ridge to the state's northeast, maintaining a fresh northeasterly airstream over Sydney Waters. A trough will cross Sydney Waters late today or early Sunday with a fresh southerly wind change in its wake, as a second high pressure system passes to the south enters the Tasman Sea, turning winds southeasterly on Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castlecrag Marine Temperature Statistics View More

March Temperature

Sydney (Observatory Hill) (6km)

  • Lowest 1 March, 2026

    20.1 °C

  • Average March

    23.6 °C

  • Highest 5 March, 2026

    29.5 °C

Climate (2021–Present)

Sydney (Observatory Hill) (6km)

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  • Average Low 2021–2026

    14.7 °C

  • Average 2021–2026

    18.3 °C

  • Average High 2021–2026

    23.5 °C
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