Moon Mirror received acclaim from critics. Rob Sheffield of Rolling Stone called it Nada Surf's "most musically and emotionally passionate album in years, on the level of gems like Let Go, The Weight Is a Gift, and The Stars Are Indifferent to Astronomy."[9] In a four-star review, John Murphy of MusicOMH dubbed the album "a fine example of just how consistent one of the USA's most overlooked rock bands have been over the decades."[6] Metacritic, an online aggregator that applies a weighted average score of 0 to 100, with 100 being the top score, assigned an average score of 80, based on 9 reviews.[3]