Port Bonython Weather Forecast
- 13
- 21
Windy. Mostly clear
- 13
- 26
Possible shower developing
- 17
- 30
Shower or two. Possible storm
- 17
- 31
Sunny
- 17
- 34
Cloud clearing
- 16
- 27
Shower or two
- 15
- 25
Partly cloudy
Today 20 Nov Whyalla
Partly cloudy. Winds southeasterly 25 to 30 km/h tending southerly 25 to 40 km/h in the middle of the day.
Spencer Gulf Coastal Waters
- Wind
- South to southeasterly 15 to 25 knots, reaching up to 30 knots north of Cowell to Wallaroo in the late afternoon.
- Seas
- Around 1 metre, increasing to 1 to 2 metres during the afternoon.
- 1st Swell
- South to southwesterly around 1 metre, increasing to 1 to 2 metres south of Cowell to Wallaroo.
- Weather
- Partly cloudy.
- Weather Situation
- A high pressure system centred well south of Perth extends a ridge over SA with a broad south to southwesterly flow extending across agricultural areas. The ridge will move southeast today as the high centre moves to a position well south of the Bight. The high will pass over Tasmania on Friday and a trough will move over the far west of SA. This trough will move slowly over the state during the weekend to reach eastern districts late Saturday. A second low pressure trough is expected enter the far west of SA on Sunday.
Port Bonython Temperature Statistics View More
November Temperature
Whyalla Airport (24km)
Lowest 12 November, 2025
5.1 °CAverage November
17.7 °CHighest 1 November, 2025
30.3 °C
Climate (2020–Present)
Whyalla Airport (24km)
Average Low 2020–2025
11.9 °CAverage 2020–2025
17.4 °CAverage High 2020–2025
23.8 °C