Mornington Island Weather Forecast
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Today 21 Dec Gulf Country
Partly cloudy. High chance of rain in the west, medium chance elsewhere. The chance of a thunderstorm. Heavy rain which may lead to flash flooding possible in the west. Light winds becoming north to northeasterly 15 to 25 km/h in the morning then becoming light in the evening. Daytime maximum temperatures 29 to 35.
South East Gulf of Carpentaria
- Wind
- Northerly 10 to 15 knots, reaching up to 20 knots inshore during the afternoon and evening.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres inshore during the afternoon.
- 1st Swell
- North to northeasterly below 1 metre.
- Weather
- Cloudy. 80% chance of rain. A thunderstorm likely.
- Weather Situation
- Tropical low 07U [1004hPa] lies in a trough near the southwest coast of the Gulf of Carpentaria. The low and trough will slowly move southwards during this weekend, settling over land near the base of the Top End early next week.
Mornington Island Temperature Statistics View More
December Temperature
Sweers Island (69km)
Lowest 2 December, 2025
19 °CAverage December
29.8 °CHighest 13 December, 2025
34.5 °C
Climate (2020–Present)
Sweers Island (69km)
Average Low 2020–2025
23.4 °CAverage 2020–2025
26.7 °CAverage High 2020–2025
30.3 °C