Dee Why Beach Weather Forecast

    • 19
    • 23

    Mostly sunny

    • 19
    • 23

    Becoming cloudy

    • 19
    • 22

    Cloudy

    • 19
    • 25

    Partly cloudy

    • 21
    • 29

    Mostly sunny

    • 22
    • 27

    Partly cloudy

    • 21
    • 26

    Partly cloudy

Today 21 Jan Sydney

Mostly sunny. Slight chance of a shower along the coastal fringe, near zero chance elsewhere. Light winds becoming easterly 15 to 20 km/h in the early afternoon then becoming light in the evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Southerly 10 to 15 knots turning east to southeasterly below 10 knots in the early afternoon then becoming east to northeasterly in the late evening.
Seas
Below 1 metre.
1st Swell
Southeasterly 2 to 2.5 metres.
Weather
Mostly sunny.
Weather Situation
A ridge lies over the NSW coast bringing east to southeasterly winds. This ridge will gradually weaken on Wednesday as winds shift southerly. Winds briefly turn east or northeasterly before another, stronger southerly change moves over the coast with the approach of a trough. Winds gradually turn northeasterly as the ridge re-establishes itself along the coast Friday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dee Why Beach Temperature Statistics View More

January Temperature

Terrey Hills (9km)

  • Lowest 12 January, 2026

    15.5 °C

  • Average January

    21.2 °C

  • Highest 10 January, 2026

    40.5 °C

Climate (2021–Present)

Terrey Hills (9km)

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  • Average Low 2021–2026

    13.4 °C

  • Average 2021–2026

    16.9 °C

  • Average High 2021–2026

    21.8 °C
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