Beryl may have left behind plenty of downed trees and flooded streets, but those may not be the only things to be concerned about.

Surfers in central Florida say they have seen an increase in the number of sharks in the water.

As of right now, lifeguards say there have been no sightings at Jacksonville Beach, but there have been some to the south. Surfers say they saw an uptick in the number sharks in the ocean over the weekend.

The increased sightings even forced some beaches in Brevard County to close.

"Bunch of sharks everywhere. There's like, out there surfing, there's just a bunch of sharks bumping into you, like everywhere," Satellite Beach surfer Alec Zappone said.

Experts warn tropical weather can stir up sharks' typical behavior.

"Sharks move in advance of any changes in rainfall or in wind speed, and the conventional wisdom is that the sharks are able to sense measures in the biometric pressure," said Dr. Jim Gelsleichter, assistant professor of biology at the University of North Florida.

Experts say the speed of the storm and the overall pressure determines how the sharks move. Beryl came through the coastline pretty quickly and may not have stirred the pressure up enough for a large number of sharks to migrate close to shore, Gelsleichter said. Regardless, this is the time of year shark activity is the greatest, he said.

"This is definitely -- as learned last week with one of the first shark bites off of our coast -- that again, this is the time where we do have to exercise caution in the water," Gelsleichter said.

That bite resulted in 85 stitches for Chad Renfro. He was bitten on his foot while surfing at Jacksonville Beach.

Hardcore surfers say they aren't letting the predator fish keep them out of the water.