Understanding the tides at the Mont

Tide times at the Mont are calculated from Saint-Malo, its reference port. The official predictions are those of the SHOM; the Tides page shows its widget.

The coefficient, calculated by the SHOM for Brest and applied to the French coast, measures the tidal range: 100 corresponds to the average equinoctial spring tide.

During spring tides, the Mont becomes an island again for about an hour. Before setting off, check the tides page on the official website.

Sources: SHOM, montsaintmichel.gouv.fr — checked on 15 November 2026.