Merries Reef Weather Forecast

    • 21
    • 30

    Showers. Storm developing

    • 17
    • 21

    Partly cloudy

    • 17
    • 23

    Partly cloudy

    • 18
    • 29

    Sunny

    • 19
    • 25

    Mostly sunny

    • 20
    • 33

    Shower or two

    • 18
    • 21

    Possible shower

Today 17 Oct Sydney

Partly cloudy. High chance of showers. A thunderstorm likely, possibly severe with damaging winds and large hail. Winds northwesterly 20 to 30 km/h shifting south to southeasterly 25 to 40 km/h in the late afternoon then decreasing to 20 to 30 km/h in the late evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Northerly 15 to 25 knots shifting south to southeasterly in the late afternoon. Winds reaching up to 30 knots in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon, increasing to 2 metres inshore by early evening.
1st Swell
Northeasterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres around midday.
Weather
Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Weather Situation
North to northwesterly remain over NSW waters. Friday a gusty southerly change will move north along the coast as a trough reaching Sydney during the afternoon, and the northern border by Saturday morning. The trough stalls over the northern waters during while a high pressure system settles over the remainder of the coast, become the dominant feature by Sunday.
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  • Temperature Forecast Bureau of Meteorology

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Merries Reef Temperature Statistics View More

October Temperature

Sydney Airport (11km)

  • Lowest 4 October, 2025

    13.2 °C

  • Average October

    21.3 °C

  • Highest 12 October, 2025

    32.8 °C

Climate (2020–Present)

Sydney Airport (11km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.6 °C

  • Average High 2020–2025

    23.3 °C
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