The mercury reached just 14 degrees on Monday and the same temperature is predicted for Tuesday.

Overnight, temperatures hit just five degrees in Albion Park while Moss Vale recorded a freezing -4 degrees; seven below average for this time of year.

The region also got its first sprinkle of rain in almost a month on Monday night, recording 0.5mm at Port Kembla and 2mm at Kiama.

Showers are expected on Tuesday but are set to almost disappear by the evening.

Weatherzone senior meteorologist Brett Dutschke said the region's surfers could expect dangerous conditions for the next 24 hours.

"Southerly winds travelling over thousands of kilometres of the Southern Ocean are hooked up to a low pressure system from New Zealeand, which is driving that dangerous surf," he said.

The swell is expected to reach its peak on Tuesday night but will remain dangerous through most of Wednesday.

Things are set to dry out from Wednesday with sun expected, temperatures in the low teens and only a chance of showers until Saturday.

Mr Dutschke said the rain was set to return on Sunday making for a gloomy, wet day.

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