Hazardous conditions are expected to continue through to Tuesday, with Tropical Cyclone Gita - which damaged parts of southern Fiji - moving from the southwest of New Caledonia towards the Tasman Sea, the Bureau of Meteorology says.

Tropical Cyclone Gita is not expected to reach the NSW Coast, but will whip up large swells on both Monday and Tuesday.

The waves on Sunday won't appear high and dangerous, but the length of time between consecutive waves will be fairly long, increasing the power of each wave, bureau duty forecaster Rob Taggart said.

"Because the water appears relatively flat it doesn't look like it will be dangerous but it carries a lot of energy and has the potential to sweep people away," Mr Taggart told AAP on Saturday.