[1] American Songwriter's Lee Zimmerman scored Skellig a 4.5 out of 5 stars, stating that it "hews to the haunting delivery and ethereal atmospherics that have characterized his work practically since day one" and "it represented a certain solace and escape from the increasing distraction of the noise and intrusion that always seems so overwhelming in today’s modern world" due to the Irish character of the music.

[5] Tony Clayton-Lea of The Irish Times scored this album 4 out of 5 stars, characterizing the music as "sublime calm" and "a serene career highlight".

[2] Ben Hogwood rated Skellig 4 out of 5 stars for musicOMH, calling it "a searching piece of work" that could "provid[e] solace for those who need it".

[6] Writing for RTÉ, Alan Corr scored Skellig 3 out of 5 stars, noting "a distinctly restless and yearning quality" and recommended listeners to try the album with headphones.

[7] Neil McCormick called this album "not for the faint-hearted" due to its "lyrically dense and musically spartan songs" and gave it 4 out of 5 stars in The Daily Telegraph.