Port Bonython Weather Forecast
- 16
- 31
Partly cloudy
- 19
- 24
Morning shower or two
- 16
- 24
Mostly sunny
- 16
- 24
Mostly sunny
- 16
- 26
Sunny
- 16
- 29
Partly cloudy
- 18
- 28
Possible shower
Today 31 Mar Whyalla
Partly cloudy. Winds northerly 25 to 40 km/h decreasing to 15 to 20 km/h in the late evening.
Spencer Gulf Coastal Waters
- Wind
- Northerly 15 to 20 knots turning westerly in the late evening.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo.
- 1st Swell
- South to southwesterly around 1 metre.
- Weather
- Partly cloudy. 60% chance of showers.
- Weather Situation
- A trough over western SA, links to a low pressure system well south of the Bight. The low and associated trough continue to move southeastwards, with the trough reaching central parts late Tuesday and then pushing into the northeast of SA on Wednesday. A high pressure system is expected to become established south of the Bight late in the week, after a weak front clips the southeast late Thursday.
Port Bonython Temperature Statistics View More
March Temperature
Whyalla Airport (24km)
Lowest 14 March, 2026
10.8 °CAverage March
20.9 °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