UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 25, 2012

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 2.02. Results of Operations and Financial Condition.

On October 25, 2012, West Marine, Inc. issued a press release announcing its condensed consolidated financial results for the 13-week period (third quarter) ended September 29, 2012 and for the 39-week period ended September 29, 2012. A copy of this press release is attached hereto as Exhibit 99.1.

The press release contains disclosure of adjusted net income and adjusted earnings per share for the fiscal third quarter 2011 and the 39-week period ended October 1, 2011. Adjusted net income and adjusted earnings per share are not measures of financial performance calculated in accordance with accounting principles generally accepted in the United States (“GAAP”). The press release contains tabular reconciliations of these non-GAAP measures to net income and earnings per share calculated in accordance with GAAP. We believe the 2011 income tax benefit from the release of substantially all of our valuation allowance is an aberration and, therefore, to provide a more useful comparison with past and future earnings, the non-GAAP measures remove income tax expense (benefit) as reported and apply our 2012 effective tax rate of 39.4% and 40.0% to fiscal third quarter 2011 and the first 39 weeks of 2011 pre-tax income, respectively. Management believes these non-GAAP measures provide a more meaningful view of our year-over-year earnings and per-share performance trends. Management has reconciled these non-GAAP financial measures to the most directly comparable GAAP financial measures in the tables included in the press release filed as Exhibit 99.1 to this report. These non-GAAP measures should be considered as a supplement to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP.

The information required to be furnished pursuant to Item 2.02 and Exhibit 99.1 of this report shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, except if we specifically incorporate it by reference into a filing under the Securities Act of 1933, as amended, or the Exchange Act.

Item 9.01. Financial Statements and Exhibits.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.