Lacy Island Weather Forecast
- 17
- 20
Partly cloudy
- 15
- 15
Cloudy
- 14
- 16
Sunny
- 16
- 20
Partly cloudy
- 19
- 20
Partly cloudy
- 18
- 20
Partly cloudy
- 19
- 20
Partly cloudy
Today 20 Sep West Coast
Mostly sunny. Slight chance of a shower south of Streaky Bay, near zero chance elsewhere. Winds north to northwesterly 25 to 35 km/h shifting south to southwesterly early in the morning then decreasing to 15 to 20 km/h in the late evening. Daytime maximum temperatures in the low to mid 20s.
Upper West Coastal Waters
Fowlers Bay to Elliston- Wind
- North to northwesterly 15 to 20 knots turning west to southwesterly before dawn then tending south to southwesterly in the evening. Winds reaching up to 25 knots south of Streaky Bay early in the morning.
- Seas
- 1.5 to 2 metres, decreasing below 1 metre during the morning, then increasing to 1 to 1.5 metres during the afternoon.
- 1st Swell
- Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres later in the evening.
- Weather
- Becoming cloudy.
- Weather Situation
- A cold front will cross the west of the state this morning and will track across the east of the state during the day. Another high pressure system will move eastwards across waters to the south during Monday then over Victoria and the Tasman Sea on Tuesday. This high will extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday.
Lacy Island Temperature Statistics View More
September Temperature
Ceduna Airport (42km)
Lowest 17 September, 2026
1.8 °CAverage September
14.3 °CHighest 12 September, 2026
29.5 °C
Climate (2021–2026)
Ceduna Airport (42km)
Average Low 2021–2026
10.9 °CAverage 2021–2026
16.8 °CAverage High 2021–2026
23.7 °C