Gannons Bay Weather Forecast

    • 15
    • 18

    Cloudy

    • 13
    • 20

    Cloud clearing

    • 13
    • 24

    Sunny

    • 16
    • 28

    Mostly sunny

    • 18
    • 26

    Showers

    • 17
    • 21

    Shower or two

    • 15
    • 21

    Possible shower

Today 28 Sep Sydney

Cloudy. Slight chance of a shower, becoming less likely in the afternoon. Winds east to southeasterly 15 to 20 km/h becoming light in the evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Southeasterly 10 to 15 knots becoming easterly below 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Cloudy.
Weather Situation
Fresh south to southeasterly winds lie over the coastal waters in the wake of a cold front. A ridge of high pressure will build over the coastal waters through the early days of the week, turning winds north to northeasterly.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Gannons Bay Temperature Statistics View More

September Temperature

Sydney Airport (14km)

  • Lowest 18 September, 2026

    9.1 °C

  • Average September

    18.2 °C

  • Highest 26 September, 2026

    33.8 °C

Climate (2021–2026)

Sydney Airport (14km)

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  • Average Low 2021–2026

    15 °C

  • Average 2021–2026

    18.8 °C

  • Average High 2021–2026

    23.5 °C
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