Enter the year, month and day:
   (years 2023...2034)
Year Month Day
Enter the time (in UTC):
Hour Minute
Time before/after High-Water Dover:
High Water at times (UTC):
Status of tide:
Moon phase, day.month.[time]: Full/New=
Tidal Currents, Channel and North-Sea


This program calculates time-difference to High-Water near Dover. The Dover-tides were calculated with WXtide32.c (copyright: see below). If the actual time is close to midnight, the nearest HW-Dover may be on the day before or after, as should be obvious from the times indicated. Moon phases follow Jean Meeus: "Astronomical Algorithms". All times given in UTC. Date-format is
Year = -4712 here corresponds to conventional "Year 4713 BC", while in conventional BC/AD-counting year 0 does not exist. The Gregorian calender starts with 15.Oct.1582, Julian ends with 4.Oct.1582. - The values for ΔT used here seem slightly more actual than those used in, which otherwise is one of the best Moon-references.

For the tidal data from program WXTide32 see:
WXTide32 Copyright (C) 1998-2007 Michael Hopper. Based on XTide 1.6.2 Copyright (C) 1997 David Flater.

Otherwise this program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the license or any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ( for more details. If errors are encountered, kindly inform: - Heiner Müller-Krumbhaar - Last update 20.april.2023.