It will soon be possible to view the water level at La Rochelle port in real time on this page.
In the meantime, here is the estimated water level (in metres) in relation to the tidal range at La Rochelle.
Please note : According to weather situation (wind direction, atmosperical pressure…) this can vary+/- 0.30m
| Coefficient | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 |
| Low waters | 3,20 | 2,90 | 2,60 | 2,30 | 2,00 | 1,70 | 1,40 | 1,10 | 0,80 | 0,50 | 0,15 |
| High waters | 4,30 | 4,50 | 4,80 | 5,00 | 5,20 | 5,45 | 5,70 | 5,90 | 6,10 | 6,40 | 6,70 |
| Tidal basins, Vieux Port | Lock opens: | Lock closes: |
| Basin “Des Yachts” | 2h30 before high waters | 1h00 after high waters |
| Basin “Des Chalutiers” | 2h00 before high waters | 1h30 after high waters |