Around 20 truckloads of sand will be delivered each day, the council said.
While the work was carried out there was likely to be some disruption to the Freyberg carpark, and access to the beach would be restricted at certain times due to safety reasons.
The council would have traffic controls in place to manage truck movements and minimise impact to the carpark and road users.
Wellington City Council's acting parks sport and recreation manager Julian Todd said whatever the weather, Wellingtonians enjoy spending time on Freyberg and Oriental Bay beaches all year round.
"To ensure they have a great experience, it's important for sand levels to be maintained," he said.
The project will cost $400,000.