Dee Why Beach Weather Forecast

    • 18
    • 21

    Showers

    • 17
    • 20

    Rain

    • 17
    • 22

    Rain

    • 14
    • 22

    Partly cloudy

    • 14
    • 21

    Mostly sunny

    • 14
    • 22

    Shower or two

    • 12
    • 18

    Mostly sunny

Today 21 May Sydney

Cloudy. High chance of showers. Light winds.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Easterly 10 to 15 knots, reaching up to 20 knots offshore in the evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres offshore.
1st Swell
Easterly 2.5 to 3 metres.
Weather
Cloudy. 70% chance of showers.
Caution
Large and powerful surf conditions for the rest of the day are expected to be hazardous for coastal activities such as crossing bars by boat and rock fishing.
Weather Situation
A strong high pressure system to the southeast of the state extends a ridge across the south coast while a coastal trough lies off the Mid North Coast, bringing east to southeasterly winds to the coast, fresh and gusty at times along the north coast. The trough will continue to move slowly towards the far north coast today and deepen into a low pressure system late Thursday or early Friday. This system will then move south towards the far south coast by late Friday, bringing fresh to strong east to northeasterly winds ahead of it. The low will then move offshore across the southern Tasman as a series of cold fronts cross the state on the weekend through the early new week, bringing generally westerly winds along the coast.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dee Why Beach Temperature Statistics View More

May Temperature

Terrey Hills (9km)

  • Lowest 2 May, 2025

    10.8 °C
  • Average May

    15.8 °C
  • Highest 6 May, 2025

    25.2 °C

Climate (2020–Present)

Terrey Hills (9km)

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  • Average Low 2020–2025

    13.4 °C
  • Average 2020–2025

    16.9 °C
  • Average High 2020–2025

    21.7 °C
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