UP TO 11 cyclones will threaten Australian waters this summer, with three of those likely to form off the east coast, as long-term forecasts predict a hotter, wetter season with more storms.
Analysis by Sky News Weather released on Monday found Australia is emerging from its hottest winter on record -- going as far back as 1910 -- only to face more hot days over Christmas and into the new year.
Chief meteorologist Tom Saunders said to expect maximum temperatures to be above average "for most parts of the country".
The scorching days are becoming the norm with every Australian capital city copping hotter-than-usual summers for the past five years.
Both Sydney and Brisbane can expect temperatures this year to be a few degrees above average, although there is little chance of heatwaves.
With 11 tropical cyclones predicted to form this year, potentially topping the nine that formed last year, Mr Saunders predicts at least four will make landfall.
Of those, three are expected to take shape off northern Queensland and at least one is likely to batter the east coast.
In March, Cyclone Debbie crossed the Central Queensland coast but delivered flooding rains to inland areas and eventually to northern New South Wales.
"Two to three tropical cyclones are likely off the Queensland east coast with one coastal crossing," he said.
"Last year we saw only one tropically cyclone (Debbie) in the Coral Sea which made landfall as category 4 system."
South-east Queensland and Sydney are both being told to expect more severe thunderstorms and more rain
SEQ can expect up to 28 days with severe thunderstorms -- the average is 20.
Sydneysiders meanwhile are being told they could have 22 days with severe thunderstorms, up from an average of 17.
North-east NSW and SEQ in particular are more likely to cop severe thunderstorms when the weather patterns are neutral like they are at the moment, that is, neither El Nino or La Nina,
Severe thunderstorms can include hail larger than a $2 coin, winds beyond 90kmh, flash flooding or tornadoes.