Garden Island Weather Forecast
- 12
- 21
Shower or two
- 13
- 19
Shower or two
- 7
- 21
Shower or two. Becoming windy
- 12
- 18
Shower or two
- 10
- 21
Possible shower
- 8
- 21
Mostly sunny
- 9
- 25
Mostly sunny
Today 7 Sep Hunter
Partly cloudy. The chance of fog early this morning. Medium chance of showers about the Lower Hunter, slight chance elsewhere. Light winds becoming northwest to southwesterly 15 to 20 km/h in the late afternoon then tending southeast to southwesterly in the evening. Daytime maximum temperatures in the low to mid 20s.
Hunter Coastal Waters
Seal Rocks to Broken Bay- Wind
- South to southwesterly 10 to 15 knots turning east to southeasterly below 10 knots in the early afternoon then tending southeast to southwesterly 10 to 15 knots in the late evening. Winds reaching up to 30 knots south of Port Stephens in the late evening. Squalls possible with the wind change.
- Seas
- Around 1 metre, decreasing below 0.5 metres around midday, then increasing to below 1 metre during the afternoon.
- 1st Swell
- Southerly 2 to 3 metres, decreasing to 1.5 to 2 metres later in the evening.
- Weather
- Mostly sunny. 70% chance of showers. The chance of a thunderstorm late this afternoon and evening.
- Weather Situation
- A broad high pressure ridge continues to build from the west while a trough lingers over the far northeast of the state. A weak cold front is forecast to cross the far southeast of the state this morning, bringing a gusty southerly change up the NSW coast, followed by another cold front and southerly change mid-week.
Garden Island Temperature Statistics View More
September Temperature
Williamtown RAAF Base (21km)
Lowest 1 September, 2026
5.4 °CAverage September
18.9 °CHighest 5 September, 2026
32.8 °C
Climate (2021–2026)
Williamtown RAAF Base (21km)
Average Low 2021–2026
13.5 °CAverage 2021–2026
18.2 °CAverage High 2021–2026
24 °C