Tidewater (TDW) 8-K Tidewater to Present at the Johnson Rice & Company 2011 Energy Conference

Exhibit 99.1

Tidewater to Present at the Johnson Rice & Company 2011 Energy Conference

NEW ORLEANS, September 27, 2011 – Tidewater Inc. (NYSE: TDW) announced today that Dean E. Taylor, Chairman, President and Chief Executive Officer, and Joseph M. Bennett, Executive Vice President and Chief Investor Relations Officer, will present at the Johnson Rice & Company 2011 Energy Conference in New Orleans, Louisiana, on Tuesday, October 4, 2011, at approximately 10:45 a.m. Central time. The presentation will be available via real-time webcast athttp://www.tdw.com. Playback will be available on October 4, 2011, at approximately 11:45 a.m. Central time. Upon completion of the presentation, the company will also file a Form 8-K with the SEC which will include a transcript of the presentation and a copy of the slides used by the presenters.

Tidewater Inc. owns 358 vessels, the world’s largest fleet of vessels serving the global offshore energy industry.

CONTACT: Tidewater Inc., New Orleans

Joe Bennett, Executive Vice President and Chief Investor Relations Officer

504-566-4506