MarineMax (HZO) 10-K 2012 FY Annual report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACTS OF 2002

In connection with the Annual Report on Form 10-K of MarineMax, Inc. (the “Company”) for the year ended September 30, 2012, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William H. McGill Jr., Chief Executive Officer of the Company, certify, to my best knowledge and belief, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/S/ WILLIAM H. MCGILL JR.

William H. McGill Jr.

Chief Executive Officer

Date: December 7, 2012