The powerful nine metre waves hit Nora Head on Wednesday morning, which was the second straight day of intense weather in the region.

A deep low pressure system, which has been classified as a Tasman low rather than an east coast low, has whipped up the wild weather and is expected to cause showers, strong winds and frosty mornings along the Hunter coastline for the remainder of the week.

However, a Bureau of Meteorology spokesperson said on Wednesday afternoon the ferocious coastal conditions were expected to gradually ease from here onward.

"We've just hit the peak, and it will slowly go down as the week progresses," the spokesperson said.

"The winds are going to persist, but not like we had on Tuesday and there will be the odd shower.

The low pressure system was sitting about halfway between the NSW coast and New Zealand on Wednesday afternoon, the spokesperson said, and was moving east.

Wednesday's winds were not as intense as Tuesday, when Newcastle was lashed by gusts of 93km/h, but maximum gust speeds of 57km/h were still felt at Nobby's on Wednesday morning.

The slight reprieve from Tuesday's severity gave Hunter State Emergency Service units a much-needed quieter day.

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After responding to more than 170 calls for assistance between Friday and Tuesday, only 11 jobs had been logged in the Northern Zone on Wednesday afternoon.

"While there's still been that damaging surf, the winds will start dying off as that low pressure system moves off the coast," NSW SES Northern Zone spokesperson Janet Pettit said.

"Our volunteers have been going out in the cold and wet so it will be good for them to have a break from that and go back to their normal work."

A marine wind warning and hazardous surf warning will remain in place for the Hunter on Thursday.

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