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Beachgoers should be cautious about going into the water during the next two days, warned lifeguards across the Treasure Coast.

The National Weather Service issued a lake wind advisory in effect until 7 a.m. Tuesday and a wind advisory in effect from 7 a.m. to 7 p.m. Tuesday.

Double red flags, which mean people shouldnt enter the water, were flown Monday on guarded beaches in St. Lucie County, said spokesman Erick Gill. Single red flags were flown on guarded beaches in Martin and Indian River counties.

Lifeguards flew the flags because of high surf, beach erosion, dangerous rip currents and lots of wind expected through Wednesday, according to the National Weather Service.

Martin County Ocean Rescue Capt. Emily Hall advised against people going into the water because of rough conditions. She said its not good weather for recreation, and conditions arent even good for surfing.

Indian River County Ocean Rescue Capt. John Frazier said he saw surfers Monday at Wabasso Beach, but he advised beachgoers to swim near lifeguards if they decide to go into the water.

Frazier also saw minimal erosion Monday about 2 to 3 feet in Indian River County compared to Martin County, where Hall saw every beach already experienced erosion, especially Bathtub Reef Beach, because of big waves.

The biggest effect St. Lucie County would see on its beaches is immediately south of the Fort Pierce Inlet, Gill said. South Hutchinson Island from Normandy Beach to the Martin County line was renourished this summer, he said.

When we have heavy winds and surf like this, we typically see escarpments (small cliffs) along the beaches, Gill said. These will take some time to smooth out following the event, with sand being deposited offshore and then replaced back on the beach when conditions return to normal through natural processes.

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Caution urged at Treasure Coast beaches as winds affect surf, erosion