Just as the height of high tide and low
tide varies from day to day and place to place, we still know that high tide will be higher than low tide on any one day at any one place.
Not exact matches
The timings of tours depends on when low
tide is, this means departure times
vary from day to day.
7.2 The Equipment shall be available outside of lesson time only; lesson time being the time period during which surf lessons take place and which will
vary from day to day depending on weather, surf conditions and
tides.
You seem
to speak with certainty, but «low low
tide»
varies a lot
from day to day.