Port Bonython Weather Forecast
- 21
- 29
Clear
- 21
- 44
Sunny
- 30
- 44
Becoming windy. Partly cloudy
- 22
- 33
Sunny
- 23
- 39
Sunny
- 25
- 38
Mostly sunny
- 22
- 28
Becoming windy. Partly cloudy
Today 25 Jan Whyalla
Clear. Winds southerly 20 to 30 km/h.
Spencer Gulf Coastal Waters
- Wind
- South to southwesterly 15 to 20 knots tending south to southeasterly in the evening.
- Seas
- 1 to 1.5 metres.
- 1st Swell
- South to southwesterly around 1 metre, increasing to 1 to 1.5 metres south of Port Neill to Port Victoria.
- Weather
- Mostly clear. The chance of a thunderstorm with little or no rainfall north of Cowell to Wallaroo.
- Weather Situation
- A high pressure system over waters to the south, extends a ridge over southern SA. On Monday the high moves into the Tasman Sea directing a northerly airstream over SA, ahead of another trough expected to move into the west and across the south on Tuesday. The trough moves into the eastern states on Wednesday as another high pressure system moves into waters south of the Bight to reach the Tasman Sea on Thursday whilst still maintaining a ridge over southern SA.
Port Bonython Temperature Statistics View More
January Temperature
Whyalla Airport (24km)
Lowest 23 January, 2026
12.3 °CAverage January
23.9 °CHighest 8 January, 2026
47.8 °C
Climate (2021–Present)
Whyalla Airport (24km)
Average Low 2021–2026
11.9 °CAverage 2021–2026
17.5 °CAverage High 2021–2026
23.8 °C