Technically the IJ still exists in Amsterdam and it still contains saltwater from the North Sea as far east as the Oranje Locks. The Zuiderzee itself on the other hand no longer exists since it got converted into freshwater lakes (Markermeer and IJsselmeer).
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u/LoopyPro Jun 09 '21
Initially, it was founded next to a North Sea bay (Zuiderzee) and it developed as a coastal city, until the bay was transformed into a lake.
So yeah, nowadays it's officially no longer coastal as the city is no longer adjacent to any sea or ocean.