A man who swam across Lake Michigan in 1998 said he's returning 25 years later for a longer splash.

Jim Dreyer will attempt to swim at least 82.5 miles, without getting out of the water, from Milwaukee to Grand Haven, Michigan, beginning on Aug. 1.

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Dreyer, who turns 60 in August, will be raising money for the Chief Petty Officers Association, an independent group that offers a variety of services to enlisted members of the U.S. Coast Guard.

"In conjunction with this milestone swim, I am honored to facilitate a way to give back to these life-saving guardians of Lake Michigan," Dreyer said in a written statement Monday.

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Dreyer, nicknamed "The Shark," swam from Two Rivers, Wisconsin, to Ludington, Michigan, in 1998 without getting out of the water. The 50-mile swim turned into a 65-mile odyssey due to strong currents.

In 2013, Dreyer towed bricks and swam for 51 hours in Lake St. Clair in southeastern Michigan.