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Showers are scattering across Qld's south, NSW, Vic, Tas & SA as moist air feeds a broad trough. The showers are increasing to heavier rain in Tas's east where easterly winds are moist & unstable. A high is clearing SA's west, the NT & WA. A front is bringing showers to SW WA.
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Today, 1:11AM UTC
Wettest spell of 2026 coming to Perth, southwest WA
Right on cue for the start of winter, a series of cold fronts will deliver a week of consistent showery weather for Perth and southwest WA, with light showers already scooting through the region on Wednesday morning and heavier rain likely to commence this afternoon or evening. While much of eastern Australia has been unseasonably wet and mild this week as a complex series of troughs and upper and lower level low pressure systems interacts with a tropical moisture feed, the southwest can expect a classic winter pattern with repeated cold fronts. Image: Satellite and radar image at 8:30am (AWST) on May 27, 2026, showing a large cloudband with only light shower activity at this stage. Source: Weatherzone. Statistically, the coming rain is overdue May is typically Perth’s fourth-wettest month, with an average rainfall of 85.5mm. To 9am this Wednesday, May 27, the WA capital has had a relatively dry month, with only two rain days and a total of just 11.8mm recorded in the city. Clear skies tend to bring cool nights, which is why Perth’s running average minimum for May 2026 is around two degrees down on average. That includes Perth’s lowest May temperature in seven years on Sunday morning, when the mercury fell to 2.5°C. How much rain is likely in the next seven days? The 7-day predicted rainfall chart (below) reveals a purple zone around Perth, indicating 100mm or more in total. That would be around the upper limit of accumulated rainfall associated with the coming systems. Image: Predicted accumulated rainfall totals for southwest WA for the seven days to Tuesday, June 2, 2026, according to the ECMWF model. Source: Weatherzone. But it appears likely that Perth could see falls in the vicinity of 10 to 20mm later this Wednesday with a similar range expected on both days this coming weekend. Lighter totals are expected on Thursday, Friday, and early next week. Thunderstorms are also a possibility in the southwest this evening, which would obviously cause some heavier rainfall totals over a relatively short duration at some locations. Will it get significantly cooler? The first front doesn’t have a particularly strong bite to it in terms of air temperatures, but the weekend system will definitely drop daytime temperatures by a few degrees, especially in the new week. Perth is expecting maximums a degree or two below the May average of 22.5°C from Thursday through to the end of the month on Sunday, then maximums of 18°C next Monday and Tuesday (June average 19.5°C). But the main story is the wet weather, which is always welcomed by most locals at this time of year. In 2025, Perth exceeded its average monthly rainfall in June, July, August and September – the first time that had happened in all four months for 18 years. There won’t be too many arguments if it’s similarly wet this winter.
Today, 12:36AM UTC
Flooding rain to target Tasmania and New South Wales
Heavy rain will cause flooding in parts of Tasmania on Wednesday, before a developing low pressure system causes further heavy rain and flooding in parts of New South Wales on Thursday and Friday. Slow-moving weather patterns causing rain this week Rain is soaking a broad area of southeastern Australia this week as a slow-moving upper-level low passes over the region, destabilising the atmosphere and creating ideal conditions for rain and thunderstorms. One reason this weather pattern is producing so much rain is because it is being fed by a steady feed of air from the tropics, which is also being boosted by additional moisture evaporating from the abnormally warm Tasman Sea. This setup is creating a conveyor belt of moisture, also known as an atmospheric river. Heavy rain targeting Tasmania on Wednesday Tasmania will experience the result of this atmospheric river on Wednesday as moisture streaming in from the Tasman Sea crashes into the state from the northeast. While this atmospheric river will only make a short pass over Tas, it will still bring enough rain to cause flooding on Wednesday. Image: Modelled precipitable water (a measure of atmospheric moisture) and 850 hPa winds at 10 am AEST on Wednesday, May 28, showing moisture-laden air flowing towards Tasmania from the northeast. Source: Weatherzone. Computer models suggest that around 50-100 mm of rain will fall over parts of northeast Tas on Wednesday, with periods of intense rain possibly delivering around 40 to 80 mm in six hours. Isolated heavy falls are also possible in other areas of eastern and southeast Tas on Wednesday. As of 10am AEST, a severe weather warning had been issued for heavy rainfall in the Furneaux Islands, North East and parts of East Coast Forecast districts. A minor flood warning was also in place for the South Esk River. Hobart will see rain from this system on Wednesday, although the city should be shielded from the heaviest falls. Rain to increase over eastern NSW as low develops from Thursday The upper-level low passing over eastern Australia this week will cause rain and thunderstorms to continue over broad areas of NSW and Qld between Wednesday and Friday. Some of this thunderstorm activity is likely to produce heavy rainfall, which may cause localised flash flooding. A more focused area of heavy rain is expected to develop over northeastern NSW on Thursday and Friday as a surface-based low pressure system develops off the state’s north coast. This heavy rain will be falling onto a landscape that is already wet from rain earlier in the week, so flooding is a high risk. While there is still some uncertainty regarding where and how much rain will fall in the coming days, the area most likely to see rainfall that could cause riverine flooding are the Hunter and Mid North Coast districts in NSW. This may change as new forecast model data becomes available over the next few days. Image: Forecast accumulated rain over southeastern Australia during the 72 hours ending at 10 pm AEST on Friday, May 29, 2026. Source: Weatherzone. As of 10 am AEST on Wednesday, a flood watch was in place for parts of the Hunter and Mid North Coast districts in NSW. Sydney and Brisbane will both see a decent amount of rain as this system continues to soak eastern Australia over the next few days. Brisbane’s wettest days will be Thursday and Friday, while Sydney should see rain ramp up on Thursday and continue into Friday based on the low pressure system’s current trajectory.
Today, 12:36AM UTC
Flooding rain to target Tasmania and New South Wales
Heavy rain will cause flooding in parts of Tasmania on Wednesday, before a developing low pressure system causes further heavy rain and flooding in parts of New South Wales on Thursday and Friday. Slow-moving weather patterns causing rain this week Rain is soaking a broad area of southeastern Australia this week as a slow-moving upper-level low passes over the region, destabilising the atmosphere and creating ideal conditions for rain and thunderstorms. One reason this weather pattern is producing so much rain is because it is being fed by a steady feed of air from the tropics, which is also being boosted by additional moisture evaporating from the abnormally warm Tasman Sea. This setup is creating a conveyor belt of moisture, also known as an atmospheric river. Heavy rain targeting Tasmania on Wednesday Tasmania will experience the result of this atmospheric river on Wednesday as moisture streaming in from the Tasman Sea crashes into the state from the northeast. While this atmospheric river will only make a short pass over Tas, it will still bring enough rain to cause flooding on Wednesday. Image: Modelled precipitable water (a measure of atmospheric moisture) and 850 hPa winds at 10 am AEST on Wednesday, May 28, showing moisture-laden air flowing towards Tasmania from the northeast. Source: Weatherzone. Computer models suggest that around 50-100 mm of rain will fall over parts of northeast Tas on Wednesday, with periods of intense rain possibly delivering around 40 to 80 mm in six hours. Isolated heavy falls are also possible in other areas of eastern and southeast Tas on Wednesday. As of 10am AEST, a severe weather warning had been issued for heavy rainfall in the Furneaux Islands, North East and parts of East Coast Forecast districts. A minor flood warning was also in place for the South Esk River. Hobart will see rain from this system on Wednesday, although the city should be shielded from the heaviest falls. Rain to increase over eastern NSW as low develops from Thursday The upper-level low passing over eastern Australia this week will cause rain and thunderstorms to continue over broad areas of NSW and Qld between Wednesday and Friday. Some of this thunderstorm activity is likely to produce heavy rainfall, which may cause localised flash flooding. A more focused area of heavy rain is expected to develop over northeastern NSW on Thursday and Friday as a surface-based low pressure system develops off the state’s north coast. This heavy rain will be falling onto a landscape that is already wet from rain earlier in the week, so flooding is a high risk. While there is still some uncertainty regarding where and how much rain will fall in the coming days, the area most likely to see rainfall that could cause riverine flooding are the Hunter and Mid North Coast districts in NSW. This may change as new forecast model data becomes available over the next few days. Image: Forecast accumulated rain over southeastern Australia during the 72 hours ending at 10 pm AEST on Friday, May 29, 2026. Source: Weatherzone. As of 10 am AEST on Wednesday, a flood watch was in place for parts of the Hunter and Mid North Coast districts in NSW. Sydney and Brisbane will both see a decent amount of rain as this system continues to soak eastern Australia over the next few days. Brisbane’s wettest days will be Thursday and Friday, while Sydney should see rain ramp up on Thursday and continue into Friday based on the low pressure system’s current trajectory.