Australian Government Bureau of Meteorology
Northern Territory
TOP PRIORITY FOR IMMEDIATE BROADCAST
Heatwave Warning
Issued at 02:43 PM CST on Sunday 14 December 2025
Valid for Sunday 14 December 2025 to Tuesday 16 December 2025
Warning for the following areas:
Arnhem
Cancellation for the following areas:
Simpson
Safety Advice:
Severe heatwaves can be dangerous for many people, especially older people, babies, children, pregnant and breastfeeding women, people with medical conditions and people who are unwell.
Seek a place to keep cool, such as your home, a library, community centre or shopping centre.
Close your windows and draw blinds, curtains or awnings early in the day to keep the heat out of your home.
If available, use fans or air-conditioners to keep cool.
Maximum temperatures over the eastern Top End in the high thirties to low forties and overnight minimum temperatures in the mid twenties. Maximum temperatures over the southeast of the NT have eased to range from the mid thirties to low forties and overnight minimum temperatures in the low to mid twenties.
Severe heatwave conditions over northeastern NT are expected to remain until mid week.
Severe heatwave conditions have eased over the Simpson district, however low intensity heatwave conditions may linger for a day or two. Locations likely to be impacted include Bulman.
The next heatwave warning will be issued by 3:00pm CST on Monday 15 December 2025
Forecast
Mount Isa East (21.4767°S, 137.2295°E, 241m AMSL) set as my default location ›
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7 day forecast
Today: Mostly sunny in the Lasseter and Simpson Districts. A slight to medium chance of showers and thunderstorms elsewhere, increasing to a medium to high chance in the Daly, Gregory, N Tanami and Carpentaria Districts. Very hot in the S Arnhem, SE Barkly and far E Simpson Districts. Light to moderate E/SE winds S of Elliott, tending fresh and gusty S of Barrow Creek during the day, with the fresh winds continuing through the evening in the E Simpson District. Light winds N of Elliott.
Forecast for Mount Isa East (21.4767°S, 137.2295°E, 241m AMSL) Mon Tue Wed Thu Fri Sat Sun Summary 
Minimum 30° 28° 29° 28° 27° 27° 28° Maximum 39° 39° 38° 35° 36° 35° 34° Chance of rain 20% 20% 40% 70% 90% 60% 70% Likely amount < 1mm < 1mm 1-5mm 1-5mm 1-5mm 1-5mm 5-10mm UV index Extreme Extreme Extreme Extreme Extreme Extreme Extreme Fire Danger Rating Moderate Moderate Moderate Moderate - - - Frost risk Nil Nil Nil Nil Nil Nil Nil 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm Wind speed 20
(km/h)17
(km/h)15
(km/h)20
(km/h)14
(km/h)15
(km/h)19
(km/h)15
(km/h)11
(km/h)13
(km/h)6
(km/h)10
(km/h)10
(km/h)11
(km/h)Wind direction S S E SSE E SE NE ENE E ENE SE NE NNW ENE Relative humidity 24% 17% 41% 20% 41% 23% 53% 39% 58% 39% 62% 39% 64% 52% Dew point 10°C 10°C 17°C 12°C 18°C 14°C 21°C 19°C 22°C 20°C 22°C 19°C 23°C 23°C -
Sunrise and sunset times
Sunrise / Sunset for Mount Isa East (21.4767°S, 137.2295°E, 241m AMSL) First light Sunrise Sunset Last light Moon rise Moon set Moon phase New moon First quarter 5:33am EST 5:58am EST 7:25pm EST 7:50pm EST 2:18am EST 3:23pm EST 
Waning crescent
New moon Dec 20 First quarter Dec 28 -
Warnings
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Temperature for next 7 days
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Rain for next 7 days
