Looking far ahead, here's a listing of the highest vernal, winter and autumnal tides based on astronomical factors only, e.g. nominal. These do not take into account the surges produced by deep barometric lows and strong sustained north to north-westerly gales that cannot be predicted so far in advance.

Further, we must add on to these between six (initially) and ten (in some seven years) millimetres each successive year due to the combined land sink and the sea rise brought about by glacial and icecap melt plus the marine expansion due to escalating Global Warming.

Whilst these are indicative of inland river flooding as well as coastal levels, remember that the greatest factors are those caused by deep barometric lows and strong sustained north to north-westerly gales from late December until the first week in March, which are capable of adding over 2.5 metres on to any nominal tide. Thus the years 2009, 2010, 2014, 2015, 2018, 2019 and 2023 could be very significant.

The tables are based on Felixtowe/Harwich levels, and can be related directly to your a.s.l.


HIGHEST WINTER and SPRING TIDES     

    

4.04m  1/Mar/2006                                                 4.11m  10/Sep/2006  

4.02m  22/Mar/2007                                              4.08m  29/Sep/2007  

3.93m  9/Apr/2008                                                 3.98m  17/Oct/2008  

3.99m  13/Jan/2009                                               4.08m  23/Aug/2009  

4.04m  1/Feb/2010                                                  4.15m  11/Sep/2010  

4.06m  22/Mar/2011                                               4.14m  29/Sep/2011  

4.02m  9/Apr/2012                                                 4.08m  17/Oct/2012  

4.04m  26/Jun/2013                                               4.08m  25/Jul/2013  

4.08m  1/Feb/2014                                                  4.16m  11/Sep/2014  

4.09m  20/Feb/2015                                               4.18m  30/Sep/2015  

4.07m  10/Apr/2016                                                4.14m  18/Oct/2016  

4.02m  28/May/2017                                               4.05m  6/Nov/2017  

4.05m  4/Jan/2018                                                  4.12m  11/Sep/2018  

4.08m  21/Feb/2019                                                4.16m  30/Sep/2019  

4.07m  11/Mar/2020                                                4.12m  19/Sep/2020  

3.98m  30/Mar/2021                                                4.02m  8/Oct/2021  

3.94m  4/Jan/2022                                                 4.04m  14/Aug/2022  

4.02m  21/Feb/2023                                               4.11m  2/Sep/2023  

4.03m  11/Mar/2024                                               4.11m  20/Sep/2024  

4.00m  1/Apr/2025                                                 4.05m  9/Oct/2025

  

10 HIGHEST TIDES - ALL AUTUMNAL EQUINOX  

AUTUMN TIDES  

4.18m  30/Sep/2015  

4.16m  11/Sep/2014  

4.16m  28/Sep/2015  

4.16m  30/Sep/2019  

4.15m  11/Sep/2010  

4.15m  1/Sep/2015  

4.15m  1/Oct/2015  

4.15m  1/Sep/2019  

4.14m  10/Sep/2010  

4.14m  29/Sep/2011  

  



Pat Gowen G3IOR

Tidal Maxima

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