Sinclair Island Weather Forecast

    • 18
    • 19

    Partly cloudy

    • 18
    • 19

    Windy

    • 17
    • 18

    Cloudy

    • 18
    • 18

    Cloudy

    • 18
    • 18

    Cloudy

    • 18
    • 20

    Partly cloudy

    • 19
    • 23

    Sunny

Today 20 Dec West Coast

Partly cloudy. Slight chance of a shower. The chance of a thunderstorm west of Ceduna in the late morning and early afternoon. Winds southeasterly 15 to 20 km/h tending southeast to southwesterly 15 to 25 km/h in the middle of the day then increasing to 25 to 35 km/h in the late evening. Daytime maximum temperatures 27 to 35.

Upper West Coastal Waters

Fowlers Bay to Elliston
Wind
South to southeasterly about 10 knots increasing to 10 to 15 knots in the middle of the day then decreasing to about 10 knots in the evening.
Seas
Below 1 metre.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1.5 metres by early evening, then tending south to southwesterly around 1 metre later in the evening.
Weather
Partly cloudy. The chance of a thunderstorm in the late morning and early afternoon.
Weather Situation
A broad trough of low pressure lies over east and northern parts of the State. This area of low pressure is expected to linger over the northeast today before moving east Sunday with the next low pressure system that develops south of the bight. A high pressure ridge then extends over the west and south during Sunday, and throughout by Monday. A persistent high pressure ridge remains over the State and Coastal Waters during Tuesday and Wednesday.
Graph Plots Open in Graphs
  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sinclair Island Temperature Statistics View More

December Temperature

Ceduna Airport (66km)

  • Lowest 8 December, 2025

    6.4 °C
  • Average December

    22.2 °C
  • Highest 18 December, 2025

    43.1 °C

Climate (2020–Present)

Ceduna Airport (66km)

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  • Average Low 2020–2025

    10.7 °C
  • Average 2020–2025

    16.8 °C
  • Average High 2020–2025

    23.7 °C
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