Hunter Water says record rainfall in November has given dam storage levels in the Hunter a good boost.
Last month 365 millimetres of rain fell at Maitland, Williamtown received 250 mills, while Newcastle got 289 mills.
Total storage levels for the Chichester and Grahamstown dams are now approaching 100 per cent capacity.
Hunter Water chief operating officer Darren Cleary says after a dry spring, the rain has put storage levels in a good position for the summer months.
"Our storage levels have increased from 86 per cent total storage on the 14th of November to just under 95 per cent," he said.
"So that's an increase of nine per cent, which is around 38 billion litres of water."
Mr Cleary says a boost to the storage levels was needed.
"This year we've had very high storage levels," he said.
"The wet weather we had earlier in the year, particularly in February and leading into March we had quite a few wet weekends, that period meant our storage levels did get up to over 95 per cent.
"We then had a very dry period in September October, which meant storage levels dropped down to 86 per cent.
"But this rainfall has filled them back up again putting us in a great position for summer."
© ABC 2013
11:20 EST Since the the royals stepped off the plane on Wednesday afternoon, Sydney has turned on the great weather.