/sci/ - Science & Math

I don't want to make an extra thread for this so I'll ask here:
I was wondering how the moon and the tides are linked temporally.
Now, I know HOW the moon creates the tides: water is attracted by the moon (and sun) and thereby gathers in a sort of water hill under which the earth just rotates. I also know that both the arrival of the tides and the rising of the moon both move around an hour out of sync with the solar day each day.
Want I want to know: When I stand at a coastline and the moon is currently above me in its zenith, can I be sure that it is currently high tide or does the water "lag behind".