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.
Dee Why Beach Temperature Statistics View More
May Temperature
Terrey Hills (9km)
Lowest 2 May, 2025
10.8 °CAverage May
15.8 °CHighest 6 May, 2025
25.2 °C
Climate (2020–Present)
Terrey Hills (9km)
Average Low 2020–2025
13.4 °CAverage 2020–2025
16.9 °CAverage High 2020–2025
21.7 °C