I understand a Tidal Cycle (new moon to new moon) averages about 29 Days 12 Hours 44 Minutes and 2.8 Seconds.

Question

It would therefore be reasonable to assume that the average time from Spring Tide to Neap Tide and vice versa will be 25% of the above (about 7 days 9 hours.

As all the above refers to "averages" what I would really like to know is what is the shortest and longest possible time of a tidal cycle. Also what is the shortest possible time from Spring Tide to Neap Tide and from Neap tide to Spring Tide.

I have been unsuccessful searching the internet.

Look forward to reply.

Thank You

Mike