Oyster Spit Weather Forecast
- 13
- 25
Partly cloudy
- 11
- 24
Partly cloudy
- 11
- 26
Partly cloudy
- 9
- 26
Partly cloudy
- 10
- 29
Sunny
- 11
- 34
Sunny
- 16
- 38
Sunny
Today 21 Dec West Coast
Partly cloudy. Medium chance of showers south of Streaky Bay in the early morning. Near zero chance of rain elsewhere. Winds southwesterly 25 to 40 km/h turning southerly in the afternoon then decreasing to 20 to 30 km/h in the evening. Daytime maximum temperatures in the low to high 20s.
Upper West Coastal Waters
Fowlers Bay to Elliston- Wind
- West to southwesterly 20 to 25 knots, reaching up to 30 knots south of Streaky Bay early in the morning. Winds turning southerly 15 to 20 knots in the early afternoon.
- Seas
- 1 to 2 metres, decreasing below 1.5 metres around midday.
- 1st Swell
- Southwesterly around 1 metre, increasing to 1 to 2 metres during the morning, then tending west to southwesterly 2 to 3 metres around midday.
- Weather
- Partly cloudy.
- Weather Situation
- A broad trough of low pressure lingers over the east and northern parts of the State. A low pressure system lies south of the bight and moves east to combine with the trough early Sunday. The combined low pressure system and trough then moves east to clear SA by late Sunday. A high pressure ridge then extends over the west and south of the State behind the low pressure system during Sunday. The high pressure ridge extends across the entire State and Coastal Waters by late Sunday and persists from Monday to Thursday.
Oyster Spit Temperature Statistics View More
December Temperature
Streaky Bay (4km)
Lowest 7 December, 2025
2.9 °CAverage December
21.7 °CHighest 18 December, 2025
41.7 °C
Climate (2020–Present)
Streaky Bay (4km)
Average Low 2020–2025
12 °CAverage 2020–2025
16.4 °CAverage High 2020–2025
23.5 °C