Seal Island Weather Forecast
- 12
- 21
Cloudy
- 12
- 19
Cloudy
- 11
- 23
Sunny
- 12
- 33
Sunny
- 17
- 33
Sunny
- 16
- 25
Partly cloudy
- 15
- 24
Mostly sunny
Today 14 Dec Mount Lofty Ranges
Partly cloudy. Slight chance of a shower about the southern Fleurieu Peninsula, most likely this morning. Near zero chance of rain elsewhere. Winds west to southwesterly 20 to 30 km/h turning southerly 25 to 35 km/h in the early afternoon. Daytime maximum temperatures between 19 and 23.
South Central Coastal Waters
- Wind
- Southwesterly 15 to 20 knots turning southerly in the late afternoon.
- Seas
- 1 to 1.5 metres.
- 1st Swell
- Southwesterly 2 to 3 metres, increasing to 3 to 4 metres during the afternoon.
- Weather
- Cloudy.
- Weather Situation
- A high pressure system south of WA extends a ridge over SA. This will persist as the high slowly moves eastwards into the Bight during today, and out to the Tasman Sea by late Tuesday.
Seal Island Temperature Statistics View More
December Temperature
Encounter Bay (4km)
Lowest 3 December, 2025
6.9 °CAverage December
18.5 °CHighest 4 December, 2025
33.4 °C
Climate (2020–Present)
Encounter Bay (4km)
Average Low 2020–2025
10.4 °CAverage 2020–2025
15.1 °CAverage High 2020–2025
20.6 °C