About 100 people have rushed from the water after a school of up to 20 sharks was spotted just metres from shore off Hyams Beach

The popular tourist spot at Jervis Bay on the NSW south coast has been closed for the second day running due to shark sightings, after life savers sounded an alarm just after 2.30pm.

A school of sharks near Hyams Beach on Thursday. The Bendigo Aerial Patrol described the multiple sightings as an "interesting couple of days". Credit:Facebook

Two larger sharks have been shepherded out to sea, but about 12 smaller ones remain "two or three paces" into the water, a Westpac Life Saver Rescue Helicopter spokesman told AAP