[moonchrome]

I'm a little bit younger than OP (~10 years) - I grew up on an island in Croatia and I noticed no difference in beaches that I visited when I was a kid. The shallow rock peers are all in the same place, beaches are the same size.

Only difference I see is a slew of tourists packing every cm2 where there were far fewer while I was growing up, a lot of them getting off on how they are participating in "sustainable tourism" because their hotel has solar panels or whatever bullshit is trendy these days.

[jacquesm]

If the beach gradient is extremely shallow it will show up, if it steep you won't see any change at all for a really long time.

[foobarian]

Croatia is certainly not a paragon of flat beach terrain like the other side of the Adriatic, or the Atlantic coast in North America.

[ceejayoz]

Not everywhere has the same beaches. Do a GIS for, say, Mont-Saint-Michel in France at low tide, and you'll see the water receeds miles. It'll be more apparent in these locations; a 10cm difference might mean hundreds of feet less beach at low tide.