The National Weather Service predicts large breaking waves of up to 13 feet and life-threatening rip currents even for strong swimmers.

All , New York City and Long Island beaches are closed through Aug. 21 as Hurricane Erin makes its way up the Atlantic coast.

High surf and dangerous rip currents are likely. People are advised to stay out of the water this week, even when a lifeguard is on duty.

The NWS also expects an increase in rip current activity along the New York City and Long Island beaches, along with minor coastal flooding during high tide across the south shores of Queens, Brooklyn and Long Island starting Wednesday and peaking Thursday. The NWS Monday rated the risk of rip current occurring “moderate,” the middle tier level.

NYC anticipates showers, thunderstorms, high rip currents, surf advisories, and potential coastal flooding, with advisories for beach-goers and mariners issued.