The waves could increase the risk of rip currents.
The National Weather Service says swells kicked up by the storm should begin to arrive along the coast early Saturday.
Forecasters say the surf could perhaps remain rough into the middle of next week.
Beachgoers are advised to swim only on beaches where lifeguards are stationed.
Danielle is forecast to pass well east of Bermuda on Saturday night.
Behind Danielle, Tropical Storm Earl is moving west in the Atlantic.