[Mont Saint-Michel Tides](https://montsaintmicheltides.com) › [2026 tide calendar](https://montsaintmicheltides.com/2026-tides) › August 2026 Monthly view Mont Saint-Michel August 2026 tides ===================================== Daily high and low water times, tidal coefficients, and the days the Mont becomes a true island, for the whole month of August 2026. Highlights Month at a glance ----------------- 1 Days the Mont becomes an island - Aug 14 Friday 21:28 · Evening high tide 4 Spring tides in August (coef ≥ 95) 102 Highest coefficient (Aug 14) In August 2026 the Bay of Mont Saint-Michel sees 4 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). August 2026 calendar ---------------------- ● Spring tide coef ≥ 95 ★ Mont becomes island 1 2026-08-01 · Coef. 83 · High 09:46 · Low 04:21 2 2026-08-02 · Coef. 83 · High 10:19 · Low 04:56 3 2026-08-03 · Coef. 80 · High 10:52 · Low 05:28 4 2026-08-04 · Coef. 74 · High 11:25 · Low 06:00 5 2026-08-05 · Coef. 66 · High 12:00 · Low 06:33 6 2026-08-06 · Coef. 61 · High 00:19 · Low 07:12 7 2026-08-07 · Coef. 52 · High 01:09 · Low 08:03 8 2026-08-08 · Coef. 46 · High 02:25 · Low 09:19 9 2026-08-09 · Coef. 53 · High 04:06 · Low 10:56 10 2026-08-10 · Coef. 66 · High 05:38 · Low 12:20 11 2026-08-11 · Coef. 81 · High 06:48 · Low 01:01 12 2026-08-12 · Coef. 93 · High 07:44 · Low 02:07 13 2026-08-13 · Coef. 100 · High 08:32 · Low 03:04 14 2026-08-14 · Coef. 102 · High 09:15 · Low 03:53 · Mont becomes island ★ 15 2026-08-15 · Coef. 101 · High 09:54 · Low 04:35 16 2026-08-16 · Coef. 95 · High 10:29 · Low 05:11 17 2026-08-17 · Coef. 84 · High 11:01 · Low 05:41 18 2026-08-18 · Coef. 71 · High 11:30 · Low 06:07 19 2026-08-19 · Coef. 57 · High 11:58 · Low 06:28 20 2026-08-20 · Coef. 49 · High 00:10 · Low 06:52 21 2026-08-21 · Coef. 36 · High 00:49 · Low 07:29 22 2026-08-22 · Coef. 27 · High 01:58 · Low 08:39 23 2026-08-23 · Coef. 32 · High 04:04 · Low 10:45 24 2026-08-24 · Coef. 44 · High 05:28 · Low 12:09 25 2026-08-25 · Coef. 57 · High 06:20 · Low 00:37 26 2026-08-26 · Coef. 68 · High 07:02 · Low 01:24 27 2026-08-27 · Coef. 78 · High 07:40 · Low 02:06 28 2026-08-28 · Coef. 86 · High 08:16 · Low 02:46 29 2026-08-29 · Coef. 91 · High 08:50 · Low 03:25 30 2026-08-30 · Coef. 93 · High 09:23 · Low 04:01 31 2026-08-31 · Coef. 93 · High 09:55 · Low 04:35 Predictions: SHOM n° 2025-209 · Saint-Malo reference port [ ← Previous month ](https://montsaintmicheltides.com/july-2026-tides#month-calendar) [ Back to 2026 calendar ](https://montsaintmicheltides.com/2026-tides) [ Next month → ](https://montsaintmicheltides.com/september-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. ### When the Mont becomes an island The submersible passage to the rock is only fully covered on a handful of days each year. The Office de Tourisme classifies these "Mont becomes an island" days using local bay dynamics rather than a flat coefficient threshold; weather, wind, and atmospheric pressure all push the actual water level above or below prediction. The 2014 footbridge replaced the old causeway and let the sea wash all the way around the rock again on the strongest tides. ### How we publish these times Tide times here come from SHOM (n° 2025-209), the official French hydrographic service, with Saint-Malo as the reference port. We compile the entire year of predictions to a static file at deploy time, so each page loads from cache without a live API call. Coefficients use the standard 20 to 120 scale; "Mont becomes an island" days follow the Office de Tourisme classification, which combines coefficient with local bay dynamics. Predictions assume calm weather; check on-site signage before crossing. Frequently asked questions -------------------------- ### When is the highest tide in August 2026? ▾ The strongest spring tides of August 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 August 2026? ▾ There are 1 such days in August 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 August 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/)