Australian Weather

21 May 2026, 5:52AM UTC

A change in the weather pattern over Australia will cause a dynamic mix of weather in the country’s southeast and southwest next week, with rain, thunderstorms, snow and potentially damaging winds on the cards. Over the last few days, large areas of Australia have experienced benign weather under the influence of a large and slow-moving high pressure system. This high has acted like a shield in the atmosphere, keeping strong cold fronts and low pressure systems away from Australia. Image: Mean sea level pressure and precipitable water over Australia on Thursday morning this week, showing a large high pressure system centred over the country’s south and southeast. Source: Weatherzone. This pattern is set to change in the coming days as the high moves out over the southern Tasman Sea, making way for more volatile weather over parts of Australia. Upper-level cold pools arriving The driving-force behind the impending wet and stormy weather will be two upper-level pools of cold air passing over southern Australia. The first upper cold pool will move over southern WA and SA between Thursday and Sunday this week, before passing over southeastern Australia early-to-mid next week. A second upper-level system will then reach the country’s southwest in the middle of next week, most likely around Wednesday or Thursday. Image: Mean sea level pressure and precipitable water over Australia on Wednesday morning next week, showing a low pressure system over the country’s southeast and a cold front over the southwest. Source: Weatherzone. While rain won’t be too heavy as the first system crosses WA and SA later this week, there is potential for heavy rain and severe weather over southeastern Australia next week as it causes a low pressure system to develop. Being more than five days away, there is still a lot of uncertainty regarding the development of the low and its impacts next week. However, some forecast models predict that heavy rain could develop over parts of Tasmania, Victoria and New South Wales, most likely around Tuesday and Wednesday. In addition to rain, some areas could also see thunderstorms, snow and blustery winds. The other upper-level cold pool could also bring a burst of rain, wind and storms to the southwest of Australia around Wednesday and Thursday next week. Again, there is uncertainty around the timing and strength of this system. Anyone living in southeastern or southwestern Australia should monitor the latest forecasts and warnings over the coming week to stay up to date with the most accurate information on these developing systems. The Bureau of Meteorology will issue warnings if severe weather or severe thunderstorms are expected to occur.

21 May 2026, 1:32AM UTC

The official 2026 Australian snow season begins on Saturday, June 6, and if natural snow cover is insufficient for skiing and snowboarding on the majority of runs, Australia’s ski resorts will ensure at least some terrain is open thanks to snowmaking. Snowmaking kicked off this week in some Australian resorts this week, notably Perisher and Thredbo in New South Wales. At Perisher, the mercury fell to -5.5°C on Thursday morning, the equal-coldest night of 2026 to date (Perisher's average May minimum is -1.2°C). That made for perfect snowmaking conditions on the resort’s signature Front Valley slope. Image: Front Valley at Perisher after the first significant night of snowmaking for 2026. Source: perisher.com.au. Compare the image above to Wednesday afternoon (below), when after a brief burst of snowmaking snow the previous night had melted, the slopes were completely grassy. Image: Front Valley at Perisher before the first significant night of snowmaking for 2026. Source: perisher.com.au. How does snowmaking work? Snowmaking effectively mimics the way that nature works. It is sometimes called “artificial snowmaking” but in most cases, the term "artificial" is a misnomer. That’s because snowmaking uses the same two ingredients required to make natural snow – air and water. The water is highly pressurised, while the air is compressed. These two key ingredients are pumped out into the atmosphere alongside each other. The water droplets freeze and fall to the ground in a fine mist, landing on the air in a white blanket that forms a denser layer than natural snow. Image: Snowmaking at night on Thredbo’s Friday Flat beginner run. Source: Thredbo.com.au. The reason the layer of snow is more dense is because snow created by snowmaking doesn’t fall as flakes, which form naturally high in the atmosphere and form a lighter blanket on the ground due to air trapped between the flakes. When the mix of air and water is pumped into the air during the snowmaking process, the water freezes into tiny icy pellets rather than flakes. But the result is still much, much closer to “real” snow than ice. In the early days of snowmaking, the process of firing and adjusting air/water mixture settings on the snow guns was all done manually. But that’s all more or less automatically handled inside the operations centre at each resort these days. "Continual improvements and investment from Perisher on our snowmaking system over the last 20 years has resulted in us now having the majority of our snowmaking terrain covered with automated guns," Perisher’s Director of Mountain Operations Andrew Kennedy explains. What conditions are required for snowmaking? Obviously you need cold temperatures, although the equation is not quite that simple. Humidity is also a key factor. Water evaporates more quickly in dry air, and the process of evaporation cools the surrounding air. This means that snowmaking can sometimes take place even if the air temperature is a degree or two above zero. Conversely, it is often not possible to make snow at temperatures below zero when humidity is too high. That’s because the tiny droplets of water won’t evaporate and freeze if the air is saturated. READ MORE: How do 'super' El Niño events affect the Australian snow season? How much terrain can snowmaking cover? Some smaller resorts worldwide which are geared for beginner and intermediate skiers and boarders can cover 100% of their terrain. No Australian resort has that level of overall coverage, but Thredbo and Perisher have the top two largest snowmaking systems in the southern hemisphere. Both resorts can cover between about 10 and 20% of their total terrain with snowmaking Mt Hotham in Victoria has 320 hectares of skiable terrain, with 38 hectares (or roughly 12%) covered by snowmaking. Hotham is also the only major Australian ski resort which clearly shows its snowmaking terrain on its trail map (below). Image: The Mt Hotham trail map, with snowmaking terrain indicated by trails with an array of little snowflake icons. Source: Mthotham.com.au. What are the chances of natural snow before the June 6 ski season opening? At this stage, there are two windows for potential natural snowfalls. The first is next week, when a low pressure system and cooler airmass moves over the southeast of the mainland. There’s also a promising system on the long-range models around the start of June, which could push a series of snow-laden cold fronts towards the mountains just in time for the season opening. However, it’s too early to say much more about the latter system for now.