[Mont Saint-Michel Tides](https://montsaintmicheltides.com) › [2026 tide calendar](https://montsaintmicheltides.com/2026-tides) › September 2026 Monthly view Mont Saint-Michel September 2026 tides ======================================== Daily high and low water times, tidal coefficients, and the days the Mont becomes a true island, for the whole month of September 2026. Highlights Month at a glance ----------------- 1 Days the Mont becomes an island - Sep 12 Saturday 21:02 · Evening high tide 7 Spring tides in September (coef ≥ 95) 102 Highest coefficient (Sep 12) In September 2026 the Bay of Mont Saint-Michel sees 7 spring tides (coefficient 95 or above) and 1 days where the causeway submerges and the Mont becomes a true island. The strongest tide of the month reaches a coefficient of 102. Plan your visit around the spring cycles to see the bay at its most dramatic. [Read the high tide planning guide](https://montsaintmicheltides.com#plan-high-tide). September 2026 calendar ------------------------- ● Spring tide coef ≥ 95 ★ Mont becomes island 1 2026-09-01 · Coef. 89 · High 10:26 · Low 05:07 2 2026-09-02 · Coef. 81 · High 10:58 · Low 05:37 3 2026-09-03 · Coef. 69 · High 11:32 · Low 06:08 4 2026-09-04 · Coef. 55 · High 12:13 · Low 06:45 5 2026-09-05 · Coef. 48 · High 00:44 · Low 07:37 6 2026-09-06 · Coef. 41 · High 02:14 · Low 09:03 7 2026-09-07 · Coef. 52 · High 04:17 · Low 10:56 8 2026-09-08 · Coef. 68 · High 05:42 · Low 12:20 9 2026-09-09 · Coef. 83 · High 06:41 · Low 00:59 10 2026-09-10 · Coef. 95 · High 07:28 · Low 01:57 11 2026-09-11 · Coef. 101 · High 08:11 · Low 02:46 12 2026-09-12 · Coef. 102 · High 08:49 · Low 03:30 · Mont becomes island ★ 13 2026-09-13 · Coef. 100 · High 09:24 · Low 04:07 14 2026-09-14 · Coef. 93 · High 09:55 · Low 04:38 15 2026-09-15 · Coef. 83 · High 10:24 · Low 05:03 16 2026-09-16 · Coef. 70 · High 10:49 · Low 05:24 17 2026-09-17 · Coef. 56 · High 11:13 · Low 05:43 18 2026-09-18 · Coef. 41 · High 11:40 · Low 06:03 19 2026-09-19 · Coef. 28 · High 12:17 · Low 06:34 20 2026-09-20 · Coef. 24 · High 00:55 · Low 07:35 21 2026-09-21 · Coef. 29 · High 03:26 · Low 10:01 22 2026-09-22 · Coef. 42 · High 04:58 · Low 11:39 23 2026-09-23 · Coef. 57 · High 05:49 · Low 00:06 24 2026-09-24 · Coef. 71 · High 06:30 · Low 00:52 25 2026-09-25 · Coef. 82 · High 07:08 · Low 01:34 26 2026-09-26 · Coef. 92 · High 07:45 · Low 02:15 27 2026-09-27 · Coef. 97 · High 08:20 · Low 02:56 28 2026-09-28 · Coef. 99 · High 08:54 · Low 03:34 29 2026-09-29 · Coef. 98 · High 09:28 · Low 04:10 30 2026-09-30 · Coef. 92 · High 10:01 · Low 04:44 Predictions: SHOM n° 2025-209 · Saint-Malo reference port [ ← Previous month ](https://montsaintmicheltides.com/august-2026-tides#month-calendar) [ Back to 2026 calendar ](https://montsaintmicheltides.com/2026-tides) [ Next month → ](https://montsaintmicheltides.com/october-2026-tides#month-calendar) About the tides How the bay's tides work ------------------------ The Bay of Mont Saint-Michel sees two high tides and two low tides each day, with a tidal range that can reach roughly fourteen metres on the biggest cycles. That puts it among the largest tidal ranges in continental Europe. All times on this site are computed for the Saint-Malo reference port and adjusted for the bay. ### Why the range is so dramatic The bay funnels the Atlantic tide off the English Channel into a shallow, narrowing basin. As the tidal wave compresses, its amplitude grows. When the lunar (M2) and solar (S2) tidal forces line up at full moon and new moon, they reinforce each other and produce spring tides. The strongest spring tides of the year cluster around the equinoxes in March and September, when the Earth, Moon, and Sun align most precisely with the equator. ### How the tide differs from Saint-Malo SHOM publishes its predictions for the Saint-Malo reference port, about thirty kilometres to the west. Mont Saint-Michel tide times come from that data, adjusted for the bay: high water arrives a few minutes later, and the tidal range is amplified further, up to fourteen metres against thirteen at Saint-Malo. The coefficients are identical. Frequently asked questions -------------------------- ### When is the highest tide in September 2026? ▾ The strongest spring tides of September 2026 cluster around the full moon and new moon. Open the calendar above and look for the days marked with a coefficient of 95 or higher; the very highest of the month sits at coefficient 102. ### Which days does the Mont become an island in September 2026? ▾ There are 1 such days in September 2026. The calendar above marks them with a small star icon, and the highlights section above lists each tide cycle when the causeway submerges. ### What is the best day to visit Mont Saint-Michel in September 2026? ▾ Aim for any spring-tide day, where the coefficient is 95 or above, ideally at sunset for the most dramatic light. The bay drains far enough at low water to expose kilometres of seabed, then refills fast enough to make the rock feel cut off again. Today [ Mont Saint-Michel Tides ](https://montsaintmicheltides.com)Tide times for the bay of Mont Saint-Michel, updated yearly. montsaintmicheltides.com Browse -------- - [Today's tides](https://montsaintmicheltides.com#hero-heading) - [Now](https://montsaintmicheltides.com/now) - [Calendar](https://montsaintmicheltides.com/2026-tides) - [About](https://montsaintmicheltides.com/about) - [FAQ](https://montsaintmicheltides.com#faq-heading) - [Terms and Conditions](https://montsaintmicheltides.com/terms) Sources --------- - [ SHOM ↗ ](https://maree.shom.fr/) Source and accuracy. Predictions: SHOM (n° 2025-209), reference port Saint-Malo, distributed by the Office de Tourisme Mont Saint-Michel, Normandie. Times are in legal French time (CET in winter, CEST in summer). Strong onshore winds and low atmospheric pressure can raise actual water levels above prediction. The Tourist Office classifies "Mont becomes an island" days using local bay dynamics, not a simple coefficient threshold. Always verify on site before crossing. © 2026 montsaintmicheltides.com Last updated: 2026-05-16 Built with ♥ by [Orkhan Farmanli](https://github.com/orkhanfarmanli/)