Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement of Seacoast Banking Corporation of Florida on Form S-3 of our report dated March 15, 2017, relating to the consolidated financial statements and effectiveness of internal control over financial reporting appearing in the Annual Report on Form 10-K of Seacoast Banking Corporation of Florida as of and for the year ended December 31, 2016, and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ Crowe Horwath LLP

Crowe Horwath LLP

Fort Lauderdale, Florida

November 30, 2017