Diamond Island Weather Forecast

    • 7
    • 19

    Showers

    • 11
    • 19

    Mostly sunny

    • 8
    • 16

    Shower or two

    • 5
    • 13

    Partly cloudy

    • 5
    • 15

    Partly cloudy

    • 7
    • 18

    Mostly sunny

    • 8
    • 19

    Partly cloudy

Today 7 Sep East Coast

Cloudy. Very high chance of showers. The chance of a thunderstorm in the north in the afternoon and evening. Light winds becoming north to northeasterly 20 to 30 km/h in the morning then tending north to northwesterly 25 to 35 km/h in the early afternoon. Overnight temperatures falling to between 1 and 7 with daytime temperatures reaching between 15 and 19.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
North to northeasterly 15 to 20 knots tending north to northwesterly 20 to 25 knots during the afternoon and evening. Winds reaching up to 30 knots offshore in the evening.
Seas
Around 1 metre, increasing to 1.5 to 2.5 metres around midday.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Diamond Island Temperature Statistics View More

September Temperature

Friendly Beaches (15km)

  • Lowest 6 September, 2025

    3.3 °C

  • Average September

    9.7 °C

  • Highest 1 September, 2025

    17.4 °C

Climate (2020–Present)

Friendly Beaches (15km)

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  • Average Low 2020–2025

    9.5 °C

  • Average 2020–2025

    13.5 °C

  • Average High 2020–2025

    18.7 °C
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