Boondelbah Island Weather Forecast

    • 13
    • 30

    Sunny

    • 15
    • 21

    Showers increasing

    • 12
    • 20

    Shower or two

    • 11
    • 22

    Partly cloudy

    • 10
    • 25

    Sunny

    • 12
    • 27

    Sunny

    • 13
    • 29

    Possible shower

Today 26 Sep Hunter

Partly cloudy. Slight chance of a shower during this afternoon and evening. The chance of a thunderstorm during this afternoon and evening. Winds northwest to southwesterly 15 to 20 km/h tending southeast to southwesterly in the late evening. Daytime maximum temperatures 28 to 33.

Hunter Coastal Waters

Seal Rocks to Broken Bay
Wind
Northerly 15 to 25 knots. Winds shifting southerly 20 to 25 kts in the evening, and reaching up to 30 knots offshore south of Norah Head. Squalls possible with the wind change.
Seas
1 to 1.5 metres, increasing to 1.5 to 2 metres offshore.
1st Swell
Southerly below 1 metre.
Weather
Sunny day. The chance of a thunderstorm south of Port Stephens this evening.
Weather Situation
A high pressure system over the Tasman Sea directs a northeasterly flow through the coastal waters. A cold front and trough will pass through the Tasman Sea during the weekend, bringing a southerly change that will track northward along the NSW coast during Saturday and Sunday. Another high crossing Tasmania early next week will then extend a new ridge into the coastal waters.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Boondelbah Island Temperature Statistics View More

September Temperature

Williamtown RAAF Base (37km)

  • Lowest 9 September, 2026

    4.4 °C

  • Average September

    17.4 °C

  • Highest 21 September, 2026

    35.4 °C

Climate (2021–2026)

Williamtown RAAF Base (37km)

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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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