A spring tide weekend in Saint-Malo: the full plan

Over a spring tide weekend, the bay of Saint-Malo runs through two high waters and two low waters every twenty-four hours, with twelve metres between them. Forty-eight hours on site is therefore enough to see everything: the sea wall under the waves, the walk to Grand Bé, a foraging session and the ramparts at sunset. What remains is picking the right dates and building the days around the tide table, not the other way round.

Which weekend in 2026

The calendar below lists every episode. Two weekends stand out: 11–13 September (coefficient 102, Friday to Sunday) and 20–22 March (the tail of the spring equinox episode, coefficient 104); the August episode (13–15, coefficient 102) also catches a Saturday. A coefficient of 95 already does the job nicely if those dates are taken.

The season changes the mood more than the show: September gives you the light and a town handed back to its locals, March the low sun and the empty terraces, August a swim between two tides, and winter, outside the “official” spring tide weekends, the best wave lottery of all. The spring equinox and autumn equinox pages cover the two headline dates in detail.

Building the days

Two hours before high water, take up position: the Sillon wall from your window, or the ramparts. The flood rings the Fort National, climbs the beach, comes looking for the dyke. If swell joins in, check our “will the sea leap the wall?” index. Watch the spray from a distance, behind shelter.

Around low water, head out on foot: Grand Bé, foraging towards Rochebonne, or simply the beach grown immense. Count on two useful hours and keep a margin for the way back.

In between: Intra-Muros, a seafood platter, a boat trip around the bay or a thalasso in Paramé. The slack hours fall conveniently.

The shape of a spring-tide day, in tide hours

The exact times shift every day (check the official SHOM tide tables) but the score never changes. Writing HW for high water and LW for low water:

• HW − 1 h → HW + 1 h: the show. The sea at its highest, waves if the swell is in, the best posts filling up fast. The window not to miss, morning and evening.
• HW + 2 h → LW: the ebb. The sea falls, the beach reappears metre by metre, the time for long walks on the Sillon and photographs in the low light.
• LW − 1 h → LW + 1 h: low-tide country. Island crossings, foraging, foreshore to the horizon. Out on the ebb, back at the turn.
• LW + 2 h → HW: the flood. The sea returns at walking pace: you head back up to the wall, warm up, and pick your post for the next high water.

Two full cycles every twenty-four hours: a well-timed weekend lets you play this score four times, changing posts as you go.

The worked example: Friday evening to Sunday

Friday evening. Arrive before the evening high water if the times allow: drop the bags, then a first face-to-face with the tide from the promenade (well back) or from the room. That is the warm-up; dinner can wait for the ebb.

Saturday. The pivot day. Morning high water from the ramparts, facing Fort National; then down to the map of places that low water opens: Grand Bé and Petit Bé if the crossing window is right, the Rochebonne foreshore otherwise. Back up with the flood, a late lunch, an afternoon in the walled city or at the thalasso, and the evening high water from a new post: the breakwater seen from the Alet headland, or Dinard’s Clair de Lune promenade via the sea bus.

Sunday. A variation at sea or on the sands, weather deciding: a boat trip around the bay, a foraging session framed by the midday low water, or the full circuit of the ramparts. One last look at high water, then the evening train. The tide carries on without you.

The whole thing takes ten minutes to set up the night before, SHOM times in hand: note Saturday’s four key hours (HW, LW, HW, and the time of the turn) and the rest follows.

Where to put your bags

For a weekend, the main criterion is wasting no time on travel. Sea-facing on the Sillon, the high waters can be watched from the room, the dawn one included. Intra-Muros gives you the evenings inside the walls. The Grand Hôtel des Thermes adds a heated seawater pool between tides. Either way, book the room early: these weekends are among the most requested dates of the year.