Swan Island Weather Forecast
- 6
- 23
Becoming windy. Partly cloudy
- 12
- 18
Shower or two
- 11
- 20
Shower or two
- 10
- 21
Possible shower
- 10
- 24
Sunny
- 11
- 27
Sunny
- 13
- 27
Possible late shower
Today 9 Sep Hunter
Partly cloudy. Slight chance of a shower in the late afternoon and evening. Winds west to southwesterly 15 to 20 km/h turning south to southeasterly 25 to 35 km/h in the late morning. Daytime maximum temperatures between 19 and 23.
Hunter Coastal Waters
Seal Rocks to Broken Bay- Wind
- West to northwesterly 10 to 15 knots shifting southerly 20 to 30 knots in the early afternoon.
- Seas
- Below 1 metre, increasing to 1 to 2 metres during the afternoon, then increasing to 2.5 to 3 metres by early evening.
- 1st Swell
- Southerly 1.5 to 2 metres, decreasing to 1.5 metres during the afternoon, then increasing to 1.5 to 2.5 metres by early evening.
- Weather
- Partly cloudy. 50% chance of showers.
- Weather Situation
- A broad high pressure ridge extends across the state while a cold front crossing the eastern areas on Wednesday, with showers and fresh to strong southerly winds along the coast in its wake. Winds will gradually ease later in the week, then turn east to northeasterly as a high pressure system traverses the state's south and enters the Tasman Sea by the weekend.
Swan Island Temperature Statistics View More
September Temperature
Williamtown RAAF Base (18km)
Lowest 1 September, 2026
5.4 °CAverage September
18 °CHighest 5 September, 2026
32.8 °C
Climate (2021–2026)
Williamtown RAAF Base (18km)
Average Low 2021–2026
13.5 °CAverage 2021–2026
18.2 °CAverage High 2021–2026
24 °C