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A broad low and upper-level trough are bringing showers and isolated thunderstorms to southern SA, southwest NSW, Vic and Tas. A trough is triggering showers and isolated thunderstorms from the NT's southeast to southwest Qld. Onshore flow brings showers to eastern Qld and NSW.
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Today, 7:09AM UTC
Unusually persistent low pressure over southeastern mainland
A large, complex system of low pressure is establishing itself over the southeastern mainland this week, in an unusual set-up for the last week of autumn. As Weatherzone meteorologist Ben Domensino wrote on Monday morning, this system will deliver wet, stormy and windy weather to a broad area, and has already begun to do so. Why is this system unusual? This is an unusually persistent pattern of low pressure for this time of year. As winter sets in, low pressure systems associated with cold fronts tend to sweep across the country’s southeast quite rapidly before the next zone of high pressure calms things down for a few days. But this week’s system appears in no hurry to go anywhere fast What is a "cut-off low" and how will it impact this week’s weather? The surface low over eastern Australia is connected to a cut-off low higher up in the atmosphere. As Weatherzone meteorologist Yoska Hernandez explains, a cut-off low forms when a pool of colder air and low pressure in the upper atmosphere becomes separated, or "cut off", from the main belt of strong westerly winds that usually flow across the Southern Ocean, south of Australia. "Once cut off from this fast-moving flow, the low can become slow moving and linger over the same region for several days. This can lead to prolonged periods of cloud, rain, showers and gusty winds," Hernandez added. Words like "vagrant" or "wandering" are often applied to these upper atmospheric cold pools, because their trajectory (and the associated wet and/or severe weather) is notoriously hard to plot due to a lack of strong, consistent steering winds. Image: 500 hPa chart showing predicted pressure about five to six kilometres up into the atmosphere over Australia for this Thursday, May 28, 2026, with the position of the cut-off low evident over southern Qld. Source: Weatherzone. Where will it rain this week? Moderate and even heavy rainfall totals have been recorded in the 24 hours to 9am Tuesday across parts of New South Wales, Victoria, South Australia, Tasmania and the ACT. Further significant rainfall can be expected throughout this week – including in parts of southeast Queensland and central and northeastern New South Wales which have been very dry in recent months – due to a surface low which has formed in response to the upper low. As the week progresses and the weekend approaches, the low will cross the coastline into the Tasman Sea and it likely to produce heavy rain over parts of the NSW coast and nearby ranges, with the help of well-above average sea surface temperatures. Image: Mean sea level pressure and precipitable water for this coming Friday night, showing the position of the low off the NSW coast. Source: Weatherzone. Does this system have snow potential? The official Australian ski season begins in under two weeks, on Saturday, January 6. Currently there is no natural snow cover anywhere in Australia, and that’s highly unlikely to change until the end of this week at the earliest. One feature of cut-off lows is that they don’t usually bring cold temperatures to a large area. Indeed, you’ll often see rain (or no precipitation and mild temperatures) in Australia’s alpine region. On the menu for mainland Australia’s alpine resorts this week is rain, possibly heavy at times. Towards the end of the weekend, winds look likely to swing more westerly, and that’s when the high country could get a dusting of white. Most models are also hinting at the chance of further snowfalls at Australia’s highest elevations during the middle of next week. This much is clear: with low pressure dominating the weather across the southeast for the next week or so, there’s strong potential for wet and possibly stormy weather across the most heavily populated corner of the country.
Today, 1:32AM UTC
Rain for every Australian state and territory this week
A dynamic weather pattern will cause rain and thunderstorms over large areas of eastern, southern and western Australia this week. This wet weather will affect part of every state and territory, with heavy falls and flooding possible in at least two states – most likely New South Wales and Tasmania. This week’s active weather pattern will be driven by a series of slow-moving upper-level troughs and low pressure systems. These are essentially pools of cold upper-level air that cause the atmosphere to become unstable, creating an ideal environment for the development of wet, stormy and windy weather. Week-long soaking for southeastern Australia Arguably the most noteworthy synoptic feature that will affect Australia this week will be a series of slow-moving cut-off upper-level low pressure systems that will sit over or near southeastern Australia for the next 8 days. This slow-moving sequence of upper-level lows will cause rain over parts of SA, Qld, NSW, Victoria, Tasmania, the ACT and the southern NT from Monday to Wednesday. The bulk of the rain is then expected to contract towards eastern Australia on Thursday and Friday, before further showers spread over southeastern Australia over the weekend. The map below shows how much rain one computer model is predicting over southeastern Australia this week. Image: Forecast accumulated rain over southeastern Australia during the seven days ending at 10 pm AEST on Sunday, May 31, 2026. Source: Weatherzone. It’s currently difficult to predict exactly where and how much rain will fall over the coming week due to the dynamic nature of how the upper-level lows will interact with each other. At this stage, eastern and northern NSW and eastern Tas are two areas that have a good chance of seeing heavy rain and flooding this week. Parts of the ACT, eastern Vic and southern Qld also have a risk of heavy falls. In addition to the rain, eastern areas of NSW, Vic and Tas are likely to see an increase in wind and waves towards the end of the week as a surface-based low pressure system develops over the Tasman Sea. Wind, rain and storms coming for Western Australia Two noteworthy systems will impact WA this week. The first will be a cold front that will deliver a burst of rain, thunderstorms and blustery winds to the state’s southwest on Wednesday and Thursday. This will be a typical winter-style cold front, the type most locals will be accustomed to experiencing at this time of year. Later in the week, a complex low pressure system could bring another intense round of rain, thunderstorms and blustery winds to the southwest of WA from Saturday to Monday. This system could cause heavy rain, damaging winds and severe thunderstorms. The map below shows this week’s forecast accumulated rain over southwestern Australia. Image: Forecast accumulated rain over southwestern Australia during the seven days ending at 10 pm AEST on Sunday, May 31, 2026. Source: Weatherzone. Severe weather is possible in multiple Australian states and territories this week. Check the latest forecasts and warnings in your area for the most up-to-date information throughout the week. If you need emergency assistance due to this week’s weather, contact the SES on 132 500. In life-threatening emergencies, call triple zero.
24 May 2026, 6:02AM UTC
Coldest May morning in seven years for Perth
Residents of Perth woke up to unseasonably cold temperatures this morning. The capital city registered a minimum temperature of 2.5C at 6:56am. The last time Perth was this cold in May was about 7 years ago, on 19 May 2019. The combination of calm winds and clear skies overnight contributed to the chilly temperatures in Perth. As shown in the map below, temperatures were quite cold across the Perth Metro, with single-digit temperatures recorded along the coast and some subzero temperatures further inland. Image: Temperature readings across southwest WA at 6:15am 24 May, 2026. Source: Weatherzone. The town of Wandering, located well inland (about 110km southeast of Perth) fell to a frigid -3.2C at 6:59am today, which was the coldest May temperature for that location in 14 years. These will likely be the coldest temperatures for the month of May as mornings will trend warmer from tomorrow. Be sure to check to latest Perth forecast for details about temperatures as well as a significant rain event expected midweek.