The Coast Guard searched through the night for her, and then at 6 a.m. Tuesday, she was spotted.
Cathy Caton was cold and weary after spending 13 hours in the water, but she's expected to be fine.
She went out for a short ride Monday afternoon. When she hadn't returned by 7 p.m., her husband called the Coast Guard.
Caton had experienced a problem with her gear. She has windsurfed for 20 years and was wearing a wet suit.