Must Checkout: Mont Saint Michel Museums. La Chapelle-Saint-Aubert. Another chapel; another secret treasure has to be the La Chapelle-Saint-Aubert and visiting this chapel is one of the classic things to do in Mont Saint Michel. But this one is even stealthier and more discreet. A 45-minute guided tour from Monday to Friday, at the beginning and end of the day (mandatory booking). A 2-hour conference tour in english, giving access to closed areas, from June to September (mandatory booking). MONT SAINT-MICHEL OPENING HOURS. Mont Saint-Michel itself has no opening hours. The abbey is open from 9:30 am to 18:00 pm in the low season (September to April) and 9:00 am to 19:00 pm May to August. Remember to book your tickets in advance to really enjoy this highlight of Mont Saint-Michel. Opening times of the Abbey of Mont Saint Michel: Between May 19 and August 30, Mont Saint Michel timing is 9 AM to 7 PM. From September 1 and April 30, Mont Saint Michel timing for visitors is 9.30 AM to 6 PM. During Peak Season: From May 1st to August 31st: 09:00 AM to 07:00 PM. During Low Season: From September 1st to April 30th: 09:30 AM to 06:00 PM. Last Entry: Last entry is allowed 60 minutes before closing time. Closed On: Mont Saint Michel remains closed on January 1st, May 1st, and December 25th. 9lbLkGK.