Rosetta Harbor Weather Forecast

    • 16
    • 19

    Windy. Cloudy

    • 14
    • 20

    Mostly sunny

    • 14
    • 32

    Sunny

    • 21
    • 40

    Afternoon cool change. Windy

    • 16
    • 24

    Cloud clearing

    • 15
    • 35

    Sunny

    • 22
    • 32

    Mostly sunny

Today 21 Jan Mount Lofty Ranges

Cloudy. Slight chance of a shower about the southern Fleurieu Peninsula, near zero chance elsewhere. Winds southerly 25 to 40 km/h increasing to 30 to 45 km/h in the late evening.

South Central Coastal Waters

Wind
Southerly 20 to 25 knots, reaching up to 30 knots in the evening. Winds turning southeasterly in the late evening.
Seas
1.5 to 2 metres.
1st Swell
Southwesterly 2.5 metres.
Weather
Cloudy.
Weather Situation
A high pressure system south of WA maintains a ridge over western and southern SA, before it is expected to move eastwards on Thursday to be over the Tasman Sea on Friday. A trough of low pressure approaches from the west on Friday, forecast to move over SA during Saturday, reaching the northeast by early Sunday. Another high pressure system is expected to move over waters to the south over the weekend.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Rosetta Harbor Temperature Statistics View More

January Temperature

Encounter Bay (3km)

  • Lowest 6 January, 2026

    10.1 °C

  • Average January

    19.8 °C

  • Highest 7 January, 2026

    42.1 °C

Climate (2021–Present)

Encounter Bay (3km)

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  • Average Low 2021–2026

    10.4 °C

  • Average 2021–2026

    15.2 °C

  • Average High 2021–2026

    20.6 °C
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