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NSW residents sweat as heatwave settles in

AAP logoAAP 7/01/2017 Dan McCulloch

Most of NSW is set to sweat through a stubborn heatwave over the next week, with warm air blown in from central Australia lingering over the state.

Sydney will be spared the worst of the heat, with coastal sea breezes keeping temperatures down to between the high 20s and mid 30s for much of the week.

But inland NSW will bear the full brunt of the punishing heat, with the heatwave expected to intensify to severe or extreme levels as the week wears on.

The mercury will climb to the high 30s and 40s across much of inland NSW on Sunday, according to the Bureau of Meteorology.

"Then it just gets worse all through the week," said senior forecaster Neale Fraser.

"It'll be 40s in the northern inland areas - at least mid-40s on Friday - so it'll be very hot for people inland, especially in the northern half of the state."

Expect sounds of tossing and turning to drown out any nocturnal birdsong this week, with overnight temperatures expected to stay quite high.

And don't be fooled by possible sprinklings of rain in pockets of NSW on Sunday and Monday - the showers aren't sticking around.

The heatwave will persist over much of NSW for the week, first punishing the state's southeast before spreading its scorching wrath further north.

A southeasterly pushing up the coast on Thursday is expected to bring some relief, with temperatures tipped to fall back briefly, before creeping up again on Friday ahead of the weekend.

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