Check local websites for hours of operation.
We went during the shoulder season (the time between peak and off-peak seasons) and had a great time exploring with little to no crowds, but experienced a good amount of rain. Weather should be better in summer, but also more crowded.
The Brittany region of France is well known for its beautiful and wild coastline. Families with kids will love being surrounded by both nature and history as they take in all the wonderful sights around them. Both the beach at Plage du Môle and the walk to Fort La Latte are great for children to explore and run around and parents will love all the gorgeous photo opportunities! For those who want to explore France outside of Paris, a Saint-Malo family vacation is perfect!