Dee Why Beach Weather Forecast
- 15
- 25
Clear
- 17
- 22
Sunny day. Late shower or two
- 12
- 16
Partly cloudy
- 11
- 17
Partly cloudy
- 10
- 21
Sunny
- 13
- 26
Sunny
- 14
- 28
Sunny
Today 14 Sep Sydney
Clear. Light winds.
Sydney Coastal Waters
Broken Bay to Port Hacking- Wind
- Northerly 10 to 15 knots, reaching up to 25 knots offshore.
- Seas
- Around 1 metre, increasing to 1.5 to 2 metres offshore.
- 1st Swell
- Southerly below 1 metre.
- Weather
- Clear.
- Weather Situation
- Northerly winds will increase during today before a trough brings a southerly change to the far south in the evening. This southerly change will continue to move north along the coast on Tuesday and then strengthen as a cold front reaches the Tasman Sea. After this, southerly winds will persist as a ridge of high pressure extends across from the west.
Dee Why Beach Temperature Statistics View More
September Temperature
Terrey Hills (9km)
Lowest 10 September, 2026
8.1 °CAverage September
16 °CHighest 5 September, 2026
30.8 °C
Climate (2021–2026)
Terrey Hills (9km)
Average Low 2021–2026
13.6 °CAverage 2021–2026
17.1 °CAverage High 2021–2026
21.9 °C