QuickLinks -- Click here to rapidly navigate through this document

Exhibit 23.3

CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use in this Registration Statement on Form S-1 of Atlantic Power Corporation of our report dated March 10, 2008 relating to the financial statements of Selkirk Cogen Partners, L.P. as of December 31, 2007 and for the year then ended, which appears in such Registration Statement. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

/s/ PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
September 16, 2010

QuickLinks

Exhibit 23.3

CONSENT OF INDEPENDENT ACCOUNTANTS