Tidal ranges on the French coasts of the Channel and the Atlantic for a coefficient of 95 : maximal tidal range for average atmospheric conditions. The tidal range is the difference in height between consecutive low tides and high tides.

Tidal ranges on the French coasts of the Channel and the Atlantic for a coefficient of 95 : tidal range for mean spring tides for average atmospheric conditions. The tidal range is the difference in height between consecutive low tides and high tides.

Tidal ranges on the French coasts of the Channel and the Atlantic for a coefficient of 20 : minimum tidal range for average atmospheric conditions. The tidal range is the difference in height between consecutive low tides and high tides.

Tidal ranges on the French coasts of the Channel and the Atlantic for a coefficient of 95 : tidal range for mean neap tides for average atmospheric conditions. The tidal range is the difference in height between consecutive low tides and high tides.

Marnages sur les côtes françaises de La Manche et de l'Atlantique pour le coefficient 20 : marnage minimal pour des conditions atmosphériques moyennes.

Marnages sur les côtes françaises de La Manche et de l'Atlantique pour le coefficient 120 : marnage maximal pour des conditions atmosphériques moyennes.

This product proposes pre-computed tidal predictions (times and heights of high and low tide with tidal coefficients if available). For ports in mainland France, data are provided in local time, i.e. adjusted for summer and winter time. Tide table data are issued in three formats (PDF, XML and TXT) for publishing and reproduction by printers, associations and advertising agencies. A contract must be signed for this purpose. This product mainly covers French coasts, both in mainland France and for French overseas territories.

Marnages sur les côtes françaises de La Manche et de l'Atlantique pour le coefficient 95 : marnage de vives-eaux moyennes pour des conditions atmosphériques moyennes.

Marnages sur les côtes françaises de La Manche et de l'Atlantique pour le coefficient 45 : marnage de mortes-eaux moyennes pour des conditions atmosphériques moyennes

Shom is the national referent for the level of the sea in situ on all areas under French jurisdiction. In this capacity, he assures under the acronym REFMAR different coordination functions in the collection and dissemination of public data related to water level observations, in order to promote their use in multiple applications within the framework of international recommendations.