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.
Graph Plots Open in Graphs
  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Swan Island Temperature Statistics View More

September Temperature

Williamtown RAAF Base (18km)

  • Lowest 1 September, 2026

    5.4 °C
  • Average September

    18 °C
  • Highest 5 September, 2026

    32.8 °C

Climate (2021–2026)

Williamtown RAAF Base (18km)

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  • Average Low 2021–2026

    13.5 °C
  • Average 2021–2026

    18.2 °C
  • Average High 2021–2026

    24 °C
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