Nassau County’s Department of Health said Monday it’s OK to swim at 13 North Shore beaches.

An advisory against swimming at the beaches was issued Saturday as a precautionary measure, according to health officials.

Such advisories often are issued for beaches known to have substantial storm water runoff from heavy rainfall. The runoff can raise bacteria levels, which results in the waters failing to meet New York State standards for swimming, health officials said.

The agency said swimming can resume at the following beaches:

* Centre Island Sound in Bayville

* Creek Club in Lattingtown

* Lattingtown Beach in Lattingtown

* Laurel Hollow Beach in Laurel Hollow

* North Hempstead Beach Park in Port Washington

* Piping Rock Beach Club in Locust Valley

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* Pryibil Beach in Glen Cove

* Ransom Beach in Bayville

* Theodore Roosevelt Beach in Oyster Bay

* Sea Cliff Village Beach in Sea Cliff

* Soundside Beach in Bayville

* Stehli Beach in Bayville

* Tappen Beach in Glenwood Landing

Morgan Beach in Glen Cove remains closed to swimming because of elevated bacterial levels, health officials said.

For recorded information on beach closings and openings in Nassau, call 516-227-9700. Health department representatives are available weekdays from 9 a.m. to 4:45 p.m. at 516-227-9717.