At 21:17 water level is -0.23m and it will keep falling by 0.17m until the low tide at 23:08
The low tide with -0.4m is 28% of the lowest astronomical tide (-1.4m)
At 21:17 water level is -0.23m and it will keep falling by 0.17m until the low tide at 23:08
The low tide with -0.4m is 28% of the lowest astronomical tide (-1.4m)