I’m guessing the land is sinking. It would be VERY odd to have high water there - and NOT a little further up the coast where I live. Look at a glass of water and see the water is ever higher on one side of the glass...
Here’s a link that will shed light on this bullsh*t:
http://www.climatechangefacts.info/ClimateChangeDocuments/NilsAxelMornerinterview.pdf
Definitely a worthwhile read.