Port Bonython Weather Forecast
- 16
- 32
Sunny
- 17
- 35
Sunny
- 20
- 38
Sunny
- 19
- 28
Windy. Partly cloudy
- 17
- 28
Becoming windy. Partly cloudy
- 17
- 29
Partly cloudy
- 18
- 31
Mostly sunny
Today 27 Dec Whyalla
Sunny. Winds south to southeasterly 15 to 25 km/h.
Spencer Gulf Coastal Waters
- Wind
- East to northeasterly 10 to 15 knots, reaching up to 20 knots south of Cowell to Wallaroo in the late morning. Winds tending east to southeasterly in the early afternoon.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre around midday.
- 1st Swell
- South to southwesterly below 1 metre.
- Weather
- Sunny.
- Weather Situation
- A high pressure system maintains a broad ridge over most of South Australia. A low pressure trough enters western parts of the state later today and continues moving east on Sunday, reaching central parts on Monday. The deepening trough moves into eastern parts of SA on Tuesday, while a new ridge builds across the west.
Port Bonython Temperature Statistics View More
December Temperature
Whyalla Airport (24km)
Lowest 2 December, 2025
10.2 °CAverage December
21.8 °CHighest 18 December, 2025
42.6 °C
Climate (2020–Present)
Whyalla Airport (24km)
Average Low 2020–2025
11.8 °CAverage 2020–2025
17.4 °CAverage High 2020–2025
23.7 °C