Saint Mary Bay Weather Forecast
- 21
- 36
Partly cloudy
- 21
- 29
Windy
- 16
- 22
Partly cloudy
- 15
- 22
Partly cloudy
- 15
- 22
Partly cloudy
- 13
- 27
Sunny
- 18
- 34
Sunny
Today 11 Dec West Coast
Mostly sunny. Slight chance of a shower south of Streaky Bay, most likely in the morning and early afternoon. Near zero chance of rain elsewhere. The chance of a thunderstorm east of Ceduna in the morning and afternoon. Winds east to southeasterly 20 to 30 km/h tending southeast to southwesterly in the late afternoon. Overnight temperatures falling to between 15 and 22 with daytime temperatures reaching 32 to 41.
Upper West Coastal Waters
Fowlers Bay to Elliston- Wind
- Southeasterly 15 to 25 knots, reaching up to 30 knots south of Streaky Bay early in the morning.
- Seas
- 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
- 1st Swell
- Southwesterly 2 metres, decreasing to 1.5 metres during the morning.
- Weather
- Partly cloudy. The chance of a thunderstorm in the morning and afternoon.
Saint Mary Bay Temperature Statistics View More
December Temperature
Streaky Bay (45km)
Lowest 7 December, 2025
2.9 °CAverage December
20.6 °CHighest 3 December, 2025
36.1 °C
Climate (2020–Present)
Streaky Bay (45km)
Average Low 2020–2025
12 °CAverage 2020–2025
16.4 °CAverage High 2020–2025
23.5 °C