Port Bonython Weather Forecast
- 14
- 25
Mostly sunny
- 15
- 29
Sunny
- 17
- 31
Mostly sunny
- 20
- 24
Showers
- 19
- 25
Shower or two
- 19
- 27
Partly cloudy
- 19
- 28
Sunny
Today 13 Mar Whyalla
Mostly sunny. Winds south to southeasterly 20 to 30 km/h.
Spencer Gulf Coastal Waters
- Wind
- Southeasterly 15 to 25 knots.
- Seas
- 1.5 to 2 metres, decreasing to 1 to 1.5 metres around midday, then increasing to 1 to 2 metres by early evening.
- 1st Swell
- South to southwesterly around 1 metre, increasing to 1 to 2 metres south of Port Neill to Port Victoria.
- Weather
- Partly cloudy.
- Weather Situation
- A ridge of high pressure extends from a high south of Perth, across waters well south of SA. The high slowly moves eastwards to be centred well south of the Bight later today and over the Tasman Sea by Saturday afternoon, with further high pressure systems building well south of the Bight. A trough over inland WA is expected to move across western SA over the weekend.
Port Bonython Temperature Statistics View More
March Temperature
Whyalla Airport (24km)
Lowest 10 March, 2026
13.2 °CAverage March
20.7 °CHighest 10 March, 2026
34.9 °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