But if it is any consolation, our rain ended up falling west of the ranges with good falls recorded.

Meteorologist with weatherzone Graeme Brittain says the weather modelling often changes as nature takes its course.

"It looks like most of the rain fell on the western side of the ranges of NSW," he said.

"It was similar in Queensland, with the coastal areas not receiving forecast showers and rain while plenty fell west of those ranges.

"Port Macquarie-Hastings received only a few millimetres, if any, of that forecast rain."

Mr Brittain said early modelling showed moisture feeding across the coastal areas but, essentially, that rain fell elsewhere.

"It is the difference between a observation compared to a forecast," he added.

The split off low that was to combine to produce our forecast rain has now moved into the Tasman Sea where it is intensifying.

Behind this low, a high pressure system is building and is likely to produce some cooler nights but more settled daytime conditions.

In terms of temperatures, Wednesday and Thursday mornings will see 1 degree minimums with even cooler conditions further inland.

Tuesday and Wednesday's maximum is 19 degrees.

Temperatures will generally be warming up into the weekend as another frontal system moves in from the west.

There will be warm, north westerly winds across much of the region.

"Friday's maximum is 24 degrees, which is four above the average for this time of the year," he added.

However, there is also more cloud likely to hang around with possible rainfall late Friday or into early Saturday.

Monday should feature swells of around 2 metres before dropping on Tuesday. The low will come into effect on Wednesday and Thursday with swell conditions up to 2 metres expected.

The Bureau of Meteorology has issued a strong wind warning for the Macquarie Coast for Monday, August 27.