Tide Times

N°. of week


Day (dd/mm/yyyy)

Information for Users

The times indicated in these tide tables are given in the applicable standard time.

The times shown are therefore:

GMT + 1 hr
until 29th March 2020 at 2 hrs 00 UT + 1

GMT + 2 hrs
from 29th March 2020 at 3 hrs 00 UT + 2
to 25th October 2020 at 3 hrs 00 UT + 2

GMT + 1 hr
from 25th October 2020 at 2 hrs 00 UT + 1

NB: in order to avoid any ambiguity on the days on which the time changes (29th March 2020 and 25th October 2020), the times on those days on which a change occurs are preceded by an *.

Important Notice

In neap tide conditions (tidal coefficients lower than 50), there is a retention phenomenon which results in a high water slack stand of 1 to 3 hours in duration, with a variation in the water level of less than 20 cm. This phenomenon renders the determination of the high tide time imprecise.

Therefore, there may be notable differences in relation to the predictions provided by the Naval Hydrographic and Oceanographic Service (NHOS) for Saint Nazaire, all the more so as for safety reasons, it has been decided to indicate in these tide tables the time at which slack water begins. Such differences are often less than 15 minutes.