Rosetta Harbor Weather Forecast

    • 14
    • 21

    Mostly clear

    • 13
    • 21

    Morning shower or two

    • 14
    • 23

    Sunny

    • 13
    • 30

    Mostly sunny

    • 14
    • 21

    Partly cloudy

    • 11
    • 22

    Partly cloudy

    • 13
    • 19

    Cloudy

Today 9 Dec Mount Lofty Ranges

Mostly clear. Winds southeasterly 15 to 25 km/h.

South Central Coastal Waters

Wind
Southeasterly 15 to 20 knots.
Seas
Around 1 metre, increasing to 1 to 1.5 metres west of Kangaroo Island.
1st Swell
Southwesterly 3 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system over the Bight extends a ridge of high pressure over most of the state and will persist over southern SA during Wednesday and Thursday. Meanwhile, a trough of low pressure over the far northwest is expected to move along the northern border on Wednesday. The trough will extend further south on Thursday then move eastwards across the west and south of SA on Friday. Another ridge of high pressure will move over the south over the weekend and the trough will move slowly northeastwards.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Rosetta Harbor Temperature Statistics View More

December Temperature

Encounter Bay (3km)

  • Lowest 3 December, 2025

    6.9 °C

  • Average December

    18.7 °C

  • Highest 4 December, 2025

    33.4 °C

Climate (2020–Present)

Encounter Bay (3km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    15.1 °C

  • Average High 2020–2025

    20.6 °C
Get WillyWeather+ to remove ads