Annual Tide Tables
for Walton-on-the-Naze, Margate, Southend-on-Sea, Coryton, Tilbury,
North Woolwich and London Bridge can be found here on the Port
of London website.
See below for tidal predictions to 2037 for regatta planning.
As you can see from the table below, Walton is 5 minutes earlier than Harwich.
Tidal Differences on Harwich. 51.9500° N, 1.2833° E
Tide Tables up to 2037 for Regatta Planning
Magic Instinct Software have produced an add-on layer for Google Earth to read the data produced by the University of Udinese to give estimated tidal predictions world wide up to year 2037.
Download the little 220kB file from justmagic.com , page down to 'item 7 - Tide predictions for around the globe' and at the bottom of the section click on 'Open this Placemark' . Once the little file is downloaded, double left click on the file World-Tides.kmz to open it with Google Earth. This will load the add-on to 'Places' on your copy of Google Earth on your computer.
Navigate to the port you require, hover your mouse over a tide icon and you will see a popup box for tidal information. Click on the link and a tidal sine wave will load for todays date. At the bottom of the page is a date box for putting your day/month/year up to 2037
Thanks to Google; JustMagic; XTide; and the University of Udinese (Italy) for the data.