Prosper in a dynamic world
Search

Spring heat on the horizon

An unseasonably hot airmass will linger across parts of southern Australia next week, with temperatures set to reach the 40s across Australia’s interior and the low 30s in some capital cities. 

 Heat has been building over northern Australia during the opening weeks of spring, with severe heatwave conditions impacting those living in the north during the past week. This heat is likely to spread south later this week into next as northerly winds ahead of a cold front transport it over the southern states.  

 Temperatures across the interior of WA, SA and the NT should reach around 8 to 10°C above average for several days from Sunday, with Adelaide and Melbourne set to see a run of days 5 to 10°C above average. 

Image: 2m temperature anomaly (°C) for three days beginning on Sunday, October 13, according to GFS. Source:ClimateReanalyzer 

While the peak of the heat will be confined to the interior of the states, Adelaide, Melbourne and Hobart will see a run of warm spring-like days: 

  • Adelaide should see around 5 to 6 days above 24°C starting Sunday, October 13, with temperatures peaking at around 30 to 31°C on Tuesday.  
  • Melbourne should peak at 25°C on Sunday before a cold front cools temperatures on Monday. Temperatures will increase again on Tuesday and Wednesday to around 24 to 26°C. 
  • Hobart will also see some temperature swings this week, with temperatures peaking at around 22 to 23°C Sunday.  
  • Sydney and Brisbane should see temperatures rise from Thursday, October 17. 

The map below shows the maximum temperature forecast for Tuesday, October 15 with temperatures reaching the 40s through the interior of Australia. 

  

 Image: Maximum temperature forecasts for Tuesday, October 15, according to ECMWF 

Looking ahead, temperatures will cool slightly in the south as a low pressure system approaches SA from Thursday. 

Models suggest that this low pressure system could cause a widespread thunderstorm outbreak across southeastern Australia from late next week.  

The map below shows that while the south cools, eastern Australia will begin to see temperatures warm up later next week.  

 

 Image: Maximum temperature forecast for Friday, October 18, according to ECMWF. 

You can see in the map above that the peak once again peaks through Qld and NSW’s interior, meanwhile Sydney and Brisbane’s temperatures reaching the high 20s. 

Weatherzone Business has grown to become the outright leader within the Australian energy market, serving wind, solar, hydro, trading, utilities and network companies.

You can’t control the weather, but you can gain precision insights to optimise your response. What lights us up is providing your energy business with tailored weather information to reduce your risk and keep you moving ahead of the curve. 

Our services cover all aspects – from wind and solar generation to demand forecasts, wholesale markets to retail so, no matter where your company sits, we have solutions for you. We have worked closely with market participants to create products that meet the evolving needs of the sector, aiming to increase safety and profitability for our customers. 

Benefit from the timely delivery of accurate weather information, allowing informed and effective decision-making. For more information, please visit our website or email us at apac.sales@dtn.com.

Latest news

Satisfy your weather obsession with these news headlines from around the nation, and the world.

How Victoria just had its warmest autumn on record

Victoria just experienced it’s warmest autumn on record, but why? Average temperatures across Victoria were 1.90°C above average throughout autumn 2025, which narrowly exceeded the old record set in 2016. Image: Temperature anomalies in Victoria from 1910 to 2025. Source: BoM. Australia as a whole was 1.41°C above average in autumn 2025, which made it […]

Perth’s wettest day in 11 months as thunderstorms slam western WA businesses

Perth just registered its wettest day since July last year and more rain is in the way for Australia’s west coast in the coming days. The first five months of 2025 were unusually dry in Perth. The city only received 96 mm of its 170 mm average for the period from the start of January to […]

Powerful storms lash New Caledonia and South Pacific

Intense rainfall and thunderstorms impacted New Caledonia early this morning, with more to come for other South Pacific islands to the east. Flooding rainfall and intense thunderstorms in New Caledonia The satellite imagery below shows an area of convergence into a low pressure trough moving over New Caledonia early on Wednesday, June 4. This convergence […]

Big wintry week of rain, snow and frost for Australia’s energy market and hydropower

Rain, storms and winds will move over western WA, while two significant lows and cold fronts will send a deep chill, rain and snow driving energy demand across Tasmania and southeastern mainland Australia, in an unmistakeable sign that winter is now here. Southwest WA Perth appears set for its heaviest rain of 2025 to date […]