Brevard County Fire Rescue said on Twitter the incident happened in the area west of Fay Lake Wilderness Park in Port Saint John, located between Titusville and Cocoa.
Fire officials said the woman suffered "significant bite injuries," and had to be flown to an area trauma center.
Photos posted to Twitter show officials loading the woman into a helicopter.
Witnesses told FOX35 the woman was wounded on her side and thigh. Officials told the television station that her injuries were not considered life-threatening.
Aside from roaming farther from their lagoons, warmer temperatures also rev up alligators’ metabolism, making them more active and aggressive as they hunt for prey and mate.
The FWC recommends not swimming during dusk or dawn — an alligator’s most active hours — keeping animals on a leash and away from water and keeping a safe distance if they come into contact with the large creature.
FWC officials told FOX35 that the gator in Saturday's incident will now have to be removed and euthanized.
Fox News' Ann W. Schmidt and Allie Raffa contributed to this report.