Jeremy Harper, 35, was standing under a tree outside his tent during a thunderstorm. Officials believe the tree was struck by lightning and knocked him to the ground, according to the Navarre Newspaper.
Harper lived in Kentucky, but was camping with family in Okaloosa County.
His death is the fifth this year attributed to lightning and the third in Florida.
Florida traditionally leads the nation in lightning deaths.
Since 2007, there have been 51 people killed in the state by lightning. That's more than double the second leading state of Texas, which totaled 21 deaths.
Lightning forms when strong updrafts in towering cumulonimbus clouds force molecules to collide, creating an electric charge.
Lightning rapidly heats a narrow channel of air to temperatures as high as 54,000 degrees, which prompts the emission of light and a crack of thunder as super-heated air expands rapidly, producing shockwaves.
Although a popular belief is that golfers are the most likely to be struck by lightning, it's not true.
Between 2006 and 2016, fishermen accounted for more than three times as many fatalities as golfers, while beach activities and camping each accounted for at least twice as many deaths as golf, according to a National Weather Service report released in March.
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