Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in the Registration Statement (Form S-3) and related Prospectus of Tempest Therapeutics, Inc. for the registration of its common stock, preferred stock, debt securities, warrants, units, and rights to purchase common stock, preferred stock, debt securities or units, and to the incorporation by reference therein of our report dated March 29, 2021, with respect to the consolidated financial statements of Millendo Therapeutics, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2020, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Grand Rapids, Michigan

July 15, 2021