Seawater on the NSW south coast is sitting at more than 20 degrees celsius, even higher than the average at this time of year.

The Easter long weekend has traditionally been the last hurrah for Canberrans making their way to the coast.

Bureau of Meteorology climate monitoring and prediction manager David Jones said coastal NSW waters were running one to two degrees above than average, particularly in southern areas.

"It's record warm for this time of year," he said.

"Typically we'd see temperatures at 18 or 19 degrees at this time of year, at the moment we're getting to 20 degrees or above."

The extra-warm water may invite more cars onto the roads but some traffic pressure will be eased as Roads and Maritime Services stop work on the Kings and Princes Highways during the Easter holiday.

A Roads and Maritime spokesperson said work on the Kings Highway would stop at the Nelligen upgrade at 6pm on Thursday, March 24, and resume at 7am on Monday, April 4, while work on River Forest Road would stop at 6pm on Wednesday, March 23, and resume at 7am on Tuesday, March 29.

Further north, Princes Highway roadwork on Foxground and Berry bypass would stop at 6pm this Wednesday, March 23, and begin again at 7am on Wednesday, March 30.

Weather-wise, get off work early to catch the sun on Thursday, with temperatures of 24 or 25 around Batemans Bay and the South Coast. Friday will see a front come through bringing rain and cooler weather.

From Saturday through to Monday there are medium chances of showers along the coast and temperatures will be in the mid to low 20s, with Monday being the coolest day at 20 degrees.

Senior forecaster at the Bureau of Meteorology, Neale Fraser, said the weather would be "a bit of a mixed bag – but no doom and gloom".

Mr Fraser said another burst of warm weather could not be ruled out "but the odds are lessening as we get into April, so make the most of it".

Lysanne Cameron, visitor information services and tourism manager for Eurobodalla Shire Council, said visitors could expect the warmest water of the year.

"It's a good time to go swimming, even it looks a little bit gloomy outside," she said.

If the weather sets in, non-beach events would also be available.

These included the Easter Cup at Moruya Racecourse, Tilba Easter Festival, and Cosentino The Grand Illusionist at Merimbula's fitting venue, Magic Mountain.