At 23:31 water level is 0.18m and it will keep falling by 0.18m until the low tide at 10:23
The low tide with 0.0m is 0% of the lowest astronomical tide (-0.26m)
At 23:31 water level is 0.18m and it will keep falling by 0.18m until the low tide at 10:23
The low tide with 0.0m is 0% of the lowest astronomical tide (-0.26m)