Fort Denison Weather Forecast
- 18
- 28
Clear
- 21
- 35
Shower or two
- 22
- 29
Shower or two
- 22
- 29
Cloudy
- 22
- 31
Mostly sunny
- 21
- 31
Mostly sunny
- 23
- 31
Shower or two
Today 17 Feb Sydney
Clear. Winds northerly 15 to 20 km/h.
Sydney Enclosed Waters
Sydney Harbour, Pittwater and Botany Bay- Wind
- Northerly 10 to 15 knots.
- Seas
- Below 0.5 metres.
- Weather
- Clear.
- Weather Situation
- A high pressure system over the Tasman Sea extends a ridge along the New South Wales coast. The system will slowly drift east and weaken as a cold front and its associated trough enter the state's southwest later today. The trough will then continue heading north, crossing Sydney Waters as a fresh southerly change on Wednesday afternoon, before stalling about the Mid North Coast on Thursday and gradually weakening. Winds will turn northerly later in the week through the weekend, apart from a brief incursion of southerly winds on Saturday, as another high entering the Tasman Sea extends a ridge along the coast.
Fort Denison Temperature Statistics View More
February Temperature
Sydney (Observatory Hill) (2km)
Lowest 3 February, 2026
16 °CAverage February
22.5 °CHighest 5 February, 2026
34.6 °C
Climate (2021–Present)
Sydney (Observatory Hill) (2km)
Average Low 2021–2026
14.7 °CAverage 2021–2026
18.3 °CAverage High 2021–2026
23.5 °C