Ocean Monument Across the Water from a Forest and Birch Coast — Java 26.3

A forest start with ocean about 64 blocks off and an Ocean Monument about 729 blocks north.

Top-down 2D biome map centred on the spawn marker, with markers for the ruined portal, ocean monument, ancient city and stronghold.
Java 26.3 Edition Java Spawn 136, 296 Biome Forest Structures 3
Ancient CityBamboo JungleBirch ForestForestJungleOceanOld Growth Birch ForestPlainsSnowyOcean MonumentRuined PortalStronghold
Open in the seed map →
Seed -980315403252058263

Copy it into Minecraft 26.3 (Java).

The Ocean Monument sits about 729 blocks north of spawn, so it is a real trip, but the coast is the draw. You start in forest with ocean about 64 blocks away and plains about 91 blocks off. A ruined portal stands about 111 blocks west, and an Ancient City lies about 477 blocks north-east. Old growth birch forest is about 231 blocks out, with jungle and peaks farther on.

Structures near spawn
Ruined Portal ← W 32, 336 111
Ancient City ↗ NE 576, 112 477
Ocean Monument ↑ N 400, -384 729
💎 Diamonds, open to a cave ↘ SE 163, 335 Y -34 47
💎 Diamonds, dig down ↑ N 136, 291 Y -54 5
Biome mix near spawn
Forest 20%
Deep Ocean 13%
Ocean 13%
Lukewarm Ocean 8%
Plains 7%
Old Growth Birch Forest 5%
River 5%