Tumby Bay Weather Forecast
- 12
- 29
Shower
- 13
- 23
Partly cloudy
- 10
- 22
Partly cloudy
- 8
- 29
Sunny
- 13
- 24
Partly cloudy
- 14
- 24
Shower
- 14
- 27
Partly cloudy
Today 5 Dec Lower Eyre Peninsula
Partly cloudy. The chance of fog in the early morning. Medium chance of showers in the late afternoon and evening. The chance of a thunderstorm in the evening. Winds east to southeasterly 15 to 25 km/h turning south to southwesterly 20 to 30 km/h during the morning and early afternoon then becoming light in the late evening. Overnight temperatures falling to around 11 with daytime temperatures reaching 28 to 33.
Spencer Gulf Coastal Waters
- Wind
- South to southeasterly 10 to 15 knots tending south to southwesterly 15 to 20 knots in the middle of the day then tending south to southeasterly 10 to 15 knots in the late evening. Winds reaching up to 25 knots north of Cowell to Wallaroo in the evening.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres by early evening.
- 1st Swell
- South to southwesterly below 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo.
- Weather
- Partly cloudy. The chance of a thunderstorm south of Cowell to Wallaroo.
- Weather Situation
- A low pressure trough over the west and south of SA will move northeastwards during the afternoon and evening then will linger over the northeast and far north on Friday as a ridge of high pressure builds over the south. The trough will clear to the northeast of SA late Saturday. A weak cold front will move across the southern coastal districts on Saturday as the high centre becomes established over the western Bight. The high will move slowly eastwards on Sunday and early next week.
Tumby Bay Temperature Statistics View More
December Temperature
Port Lincoln Airport (32km)
Lowest 2 December, 2025
8.5 °CAverage December
19.6 °CHighest 3 December, 2025
35.3 °C
Climate (2020–Present)
Port Lincoln Airport (32km)
Average Low 2020–2025
11.4 °CAverage 2020–2025
15.7 °CAverage High 2020–2025
21.3 °C