Seasonality:

Mont Saint Michel welcomes more than 1.2 million visitors each year. Up to 18,000 visitors can cross each other every day in such a small space. So its better to avoid the rush hours!

The months of July, and especially August are the most crowded. Other busy days are during the French school holidays and many typically French extended weekends (Easter, Ascension, Pentecost).

Here is a seasonality chart

Weather:

Due to its geographical position at the edge of the Channel Sea and its relief, Mont Saint Michel is exposed to lots of winds, it is therefore recommended to bring clothes adapted to protect you from the wind or quite frequent rain, particularly from September to mid-April.
During the months of July and August, episodes of hot weather can occur: remember to protect yourself from the sun. Our advice: the most pleasant periods to visit Mont Saint Michel are from mid-April to the end of June, as well as the month of September.

Live weather link

Access:

To reach the foot of Mont Saint Michel, it is expected to take a few hundred meters of walk back and forth and then 80 meters of steep height, dotted with 350 steps of stairs to the abbey. At the end of the visit, you will need to go down, still on foot (no need to look for elevators)! This makes it difficult for people with health concerns to access the site. Especially, for people in wheelchairs, access to the abbey will be very difficult (consult the association Handibaie).
Our advice:  get there well rested, equipped with comfortable walking shoes and a small snack.

More advice:

  •  If you have the chance to spend a night at the Mont Saint Michel, we advise you to discover the site at sunrise and or in the evening for a quieter and romantic atmosphere!

  •  During the months of July and August, a night scenery show will make you rediscover the abbey in a beautiful way.

  • Experiencing the tides at Mont Saint Michel is a beautiful natural spectacle which is worth the trip. During tides with a coefficient greater than 110, Mont Saint Michel becomes an island, which requires arriving at the site at least 2 hours before high tide. 

tides calendar link