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Troughs and developing monsoon flow are bringing storms to the northern tropics. A trough is bringing storms to Vic and southern NSW. A trough is bringing storms to inland Qld. Onshore winds directed by a high is bringing showers to eastern NSW and southeast Qld.
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Today, 2:29AM UTC
Heat in Western Australia could nudge 50°C
The mercury in Perth will rise towards 40°C this Tuesday, while Western Australia’s Pilbara region and some adjacent areas will hit the high 40s, with the potential for a 50-degree day. The extreme midweek heat is part of an ongoing heatwave across a vast area of Western Australia which began last week. Already, around half the state’s 14 official BoM forecast districts have endured heatwave conditions. While maximums in Perth will be hot but not extreme with expected highs of 39°C, 38°C and 37°C on Tuesday, Wednesday and Thursday respectively (the January record is 44.4°C), temperatures will rise rapidly as you head north. Image: Heatwave map for Western Australia for the three days from this Monday, January 19, 2026. The BoM defines a heatwave as "unusually hot maximum and minimum temperatures over 3 days compared to the local climate and past weather.” As you can see on the map above, heatwave conditions extend from the southern Kimberley region all the way down to the South West forecast district. The Northern Interior and Southern Interior forecast districts are also affected. The red zones are areas with an extreme heatwave warning – the highest level of alert. The southern red zone is located in the Gascoyne region. The northern red zone is located near the boundaries of the Pilbara, Kimberly and Northern Interior forecast districts. What’s causing this heatwave? Over the past week or so, a relatively consistent pattern of high pressure systems centred over the Southern Ocean have enabled an easterly circulation of winds across Australia south of the tropics (air circulates anti-clockwise around highs). These winds have brought consistent moisture to much of the east coast. They have then dried and heated rapidly as they crossed the interior of the continent, pushing hot air westwards. Image: Synoptic chart for Australia on January 20, 2026. According to Weatherzone meteorologist Joel Pippard, the persistent monsoon trough across northern Australia has also played a role in warming the atmosphere south of the tropics. "The monsoon is causing convection [rising air] in the tropics. After rainfall in tropical regions, this air is transported out over areas of high pressure, where it slowly makes its way to the surface and warms up again," Pippard explains. What would it take for the temperature to reach 50°C? Essentially, it’s a battle between land breezes and sea breezes. On January 13, 2022, the coastal WA town of Onslow (in the Pilbara) reached 50.7°C at 2:26pm, which equalled Australia’s all-time high temperature record (jointly held by Oodnadatta, SA). Winds were out of the east at the time of the heat record, which meant they were land breezes. An hour later, a westerly sea breeze kicked in, dropping the mercury to 42°C by 5pm. Then the land breeze took hold again, and the mercury surged back up to around 47°C within half an hour. Image: Predicted maximum temperatures for the Pilbara and nearby WA forecast districts on Tuesday, January 20, 2026, according to the ECMWF model. If you note the thin red line along the coast in the map above, you’ll see that areas immediately inland are forecast to get much hotter. For example, Onslow’s forecast maximum is "only" 40°C for Tuesday, while the inland mining towns of Marble Bar and Paraburdoo are both forecast to reach 47°C. Marble Bar reached 47.2°C on that scorching day of January 13, 2022, when Onslow briefly hit 50.7°C. Should the land breeze prove more robust than the sea breeze this Tuesday, there’s the chance that Onslow will get significantly hotter than its forecast maximum of 40°C. Australia has not seen a 50-degree day since 2022. The hottest recorded temperature to date this year in Australia was 49°C at Onslow on January 7. We’ll keep you posted. Image: Daily forecasts for Perth on the Weatherzone app.
18 Jan 2026, 12:00AM UTC
Week of large surf for NSW under active Tasman and Coral seas
An active Tasman is bringing large and unruly surf to southeastern NSW, with the Coral Sea awakening and sending waves into southeast Queensland in the coming week. Ocean conditions across NSW’s South Coast rapidly deteriorated on Friday as a deep feed of easterly winds whipped up large and dangerous surf. The Batemans Bay Surfrider buoy recorded an increase of nearly 3 metres in significant wave heights in the 8 hours to 9pm on Friday. Image: Significant wave height recordings from Surfrider buoys off Sydney and Batemans Bay’s coasts between Friday and Saturday. Source: Manly Hydraulics Laboratory. The surge of large east-to-southeast swell moved up the coast throughout Friday and into the weekend, with maximum wave heights reaching over 9 metres off the Sydney coast on Saturday morning. A Coastal Hazard Warning for Damaging Surf was issued for coastal areas south of Seal Rocks around this peak period of swell activity, but has now been cancelled with a Hazardous Surf Warning remaining in place. Video: 10 metre wind speeds across the Tasman and Coral seas over the coming week showing areas of swell generation directed towards Australia’s East Coast. As seen in the video above, storms in both the Tasman and Coral seas will continue to blow strong easterly winds over much of the coming week, directing persistent swell towards the East Coast of Australia. While the largest waves were experienced on Saturday, the swell is not expected to drop below 2 metres across much of coastal NSW between the weekend and much of next week. Video: Significant wave heights across the Tasman and Coral seas over the coming week. Coasts between Jervis Bay and Seal Rocks, including Sydney, will receive the highest energy across the period, with much of this energy coming from longer period swell from the east to southeast. This combination of size, period and direction is particularly notorious for causing significant coastal erosion, disruption to port, ferry and maritime operations, and bringing deceptively powerful surf and rip currents. Video: Peak wave period across the Tasman and Coral seas over the coming week. From mid-next week, a constant run of east to southeast swell should provide excellent waves across the prime point breaks of northern NSW and southeast Queensland as the tropics awaken.
17 Jan 2026, 9:14PM UTC
Flash floods in Sydney, Illawarra and Central Coast with weekend deluges
Intense and heavy rainfall on Saturday and early on Sunday has brought flash flooding to parts of the Greater Sydney Metropolitan region. Rainfall rates between 80 and 140mm in one to three hours were registered across parts of Sydney’s Northern Beaches and Central Coast on Saturday afternoon and evening. In some areas, these rainfall rates are comparable to the tropics and are equivalent to one in 200-to-500-year events. This intense rainfall was caused by a deep feed of moist easterly winds coming off the very warm Tasman Sea, directed over the region by a coastal trough. Video: 6-hourly rainfall estimates and rain gauge observations since 9am on Saturday morning. Further heavy falls have continued overnight, with many locations experiencing their heaviest rain in one to two years. Notable 24-hour rainfall accumulations to 9am Sunday include: 346mm at Palm Beach Golf Club 264mm at Great Mackeral Beach 260mm at Wattamolla 250mm at Pearl Beach 242mm at Woy Woy 209mm at Ettalong 194mm at Avalon 180mm at Terrey Hills (wettest day on record for the station, with records since 2005) 129mm at Norah Head (wettest January day on record, with records since 1996, and wettest day since October 2020 – 5 years ago) 134mm at Wisemans Ferry (wettest day since March 2021 – nearly 5 years ago) 124mm at Sydney Obs Hill (wettest January day since 1988 – 38 years ago) 103mm at Bankstown (wettest January day since 2001 - 25 years ago) It was the wettest January day on record (records since year) for these stations: Camden Aiport (140mm - since 1943), Penrith (105mm - since 1996), Mount Boyce (142mm - since 1995), Campbelltown (126mm - since 2007) and Gosford (125mm - since 2014) Over 90 locations across NSW with over 100mm Image: Estimated 24-hour rainfall accumulations and rain gauge observations since 9am on Saturday across the Greater Sydney Metropolitan region. Flash flooding across the region has disrupted road and train networks, with Sydney Trains having to halt rail movements between the Central Coast and Sydney. Flooding, combined with strong winds, has caused trees to fall across roads, houses and powerlines, with the SES and power networks responding to thousands of calls for help and outages. Flood prone areas like Narrabeen Lagoon in Sydney’s Northern Beaches have also been evacuated. Over 19,000 lightning strikes have also been recorded within 100km of Sydney since midnight on Friday, most of which were over the northern suburbs and Central Coast areas. Heavy rainfall continues to move into the Sydney Basin this Sunday morning, but conditions are set to improve as the day goes on. As seen in the animation below, the heaviest falls should contract north and offshore into the afternoon, with showers and more isolated heavy rain expected into Monday. Video: 6-hourly rainfall rates and 10m wind speeds according to the high-resolution ACCESS-C Sydney computer model. Keep track of the latest weather warnings on the Weatherzone Weather Warning page.