Tumby Bay Weather Forecast
- 5
- 25
Sunny
- 8
- 19
Shower
- 8
- 16
Cloudy
- 9
- 18
Shower
- 9
- 17
Partly cloudy
- 7
- 18
Cloudy
- 7
- 20
Cloudy
Today 18 Sep Lower Eyre Peninsula
Sunny. Winds northerly 25 to 40 km/h turning westerly 25 to 35 km/h in the early afternoon then decreasing to 15 to 25 km/h in the late afternoon. Daytime maximum temperatures in the low to high 20s.
Spencer Gulf Coastal Waters
- Wind
- North to northeasterly 15 to 20 knots shifting west to southwesterly 10 to 15 knots in the late afternoon.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre by early evening.
- 1st Swell
- South to southwesterly 1 to 1.5 metres, decreasing to around 1 metre around midday.
- Weather
- Mostly sunny.
- Weather Situation
- A high pressure system lies over the Tasman Sea with a ridge extending into the east of the state. A weak trough over South Australian waters will continue moving through eastern waters tonight. A cold front will pass over the south during Friday afternoon with a southwesterly flow persisting through the weekend as a ridge of high pressure extends over northern parts of the state.
Tumby Bay Temperature Statistics View More
September Temperature
Port Lincoln Airport (32km)
Lowest 2 September, 2025
4 °CAverage September
12.9 °CHighest 6 September, 2025
27.5 °C
Climate (2020–Present)
Port Lincoln Airport (32km)
Average Low 2020–2025
11.4 °CAverage 2020–2025
15.8 °CAverage High 2020–2025
21.3 °C