Australia's main weather information services from the Bureau of Meteorology went down on Friday morning, affecting everything from temperature readings to radar imagery for airports. 
A "major network problem" disrupted services this morning, one bureau staff member said, adding that technicians were working to fix it. 
Temperature readings on the bureau's website were all stuck at 6am AEDT Friday, as were the radar loops.
The disruption of information was affecting other weather services, such as Weatherzone, although its ability to make forecasts was not impacted, Rob Sharpe, a Weatherzone meteorologist, said.
"People are left in the dark," Mr Sharpe said, adding it was fortunate the disruption had come at "one of the most benign points of the day".
The outage may have triggered "a lot more complaints" had it come a couple of days ago when wild weather was sweeping across parts of eastern Australia, with heavy rain and some flooding in the Hunter region of NSW, Mr Sharpe said.
Airports were also affected, with clients telling Weatherzone that they were not getting the usual one-minute weather updates, including the bureau's lightning data.
Fairfax Media has sought comment from the bureau and Sydney Airport.
Fire authorities battling blazes near Perth will also be hoping there is no interruption to the information they receive.
Thunderstorms are also forecast for the city on Friday with another hot day expected, including a maximum of 35 degrees.
Weatherzone is owned by Fairfax Media, publisher of this website.