 Mondo Digital.com gave the film a mixed review, complimenting its atmosphere while acknowledging the film's faults, stating, "While watchable even in its shortest version, "Horrors of Spider Island" becomes a delirious experience with the added nude swimming footage.The atrocious dubbing contains some of the more quotable one-liners around, while D'Arcy's weird but decidedly non-threatening monster makes up for the decided lack of actual arachnids on screen".George R. Reis from DVD Drive-In.com gave the film a positive review, commending the film's climax as "moody" and "well-photographed".