Love Island episodes air with a near-daily schedule, typically six days a week, with Wednesdays usually off. Details you might find useful:

• In the U.S. version (Love Island USA) new episodes typically drop on Peacock at 6:00 PM PT / 9:00 PM ET, six days a week, with Wednesdays as the rest day (premiere week can have an exception) [sources indicate NBC/Peacock coverage and media outlets describing the schedule].
• The UK version follows a different rhythm, often airing almost every night with occasional special episodes or long launches, depending on the season.

If you’re asking about a specific country or season (UK vs US, season numbers), tell me which one and I’ll give you the precise pattern for that run.