BOM predicts that Port Stephens in for a drenching on Queen's public holiday: weather

The Queen's public holiday on Thursday is expected to be a wet one with a "near 100 per cent" chance of rain thanks to a low pressure system along the state's southern inland border, combined with a weak high pressure system in the Tasman Sea.

The BOM has forecast a "very high" chance of rain for Port Stephens on Wednesday afternoon and evening, as well as a "chance of a thunderstorm" in the Upper Hunter.

For the National Day of Mourning in honour of Queen Elizabeth II on Thursday, the BOM has also forecast a "very high" chance of rain - between 20 and 35mm of rainfall - and of a thunderstorm.

Showers have been predicted up until Saturday, with the sun set to make an appearance again on Sunday.

A strong wind warning is in place for the Hunter coast.

It comes as the BOM declared a third La Nina event in a row last week.

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