Very heavy surf is likely to develop during today, persisting into Monday, which may lead to localised damage and coastal erosion.
Conditions are expected to ease during Monday afternoon.
Peak wave heights are expected later this evening and may coincide with evening high tides after 10pm.
Areas impacted may include exposed coasts of the Hunter, Metropolitan and Illawarra and Shoalhaven.
Significant wave heights of over 5m are possible with peak periods around 11 seconds.
Wave directions will be from the East and South East.
Beach conditions in these areas could be dangerous and people should stay well away from the surf and surf exposed areas.
Warnings for other phenomena are also current for these areas.
Locations which may be affected include Newcastle, Gosford, Wollongong, Albion Park, Kiama and the Shoalhaven Coast.
Image: Peter Andrea