Updated for Java Edition 26.3 (October 2026).
The lukewarm ocean is a light-blue Overworld ocean between temperate and tropical seas, with a sandy floor, kelp, seagrass and tropical fish. It has no coral in Java; that belongs to the warm ocean. In our sample of 300 Java 26.3 seeds it was the fifth most common surface biome, and every seed had one.
| Dimension | Overworld |
|---|---|
| Where it generates | Mild to warm stretches of sea, usually ringed by deep lukewarm ocean, beaches and stony shores |
| How common | 4.6% of the surface in our sample (about 1 block in 22) |
| Distance from spawn | Median 970 blocks; within 1,000 blocks in 52% of seeds, within 2,000 in 82% (our sample) |
| Mobs | Cod, tropical fish, pufferfish, squid, dolphins, nautiluses and drowned |
| Notable blocks | Sand floor, kelp, seagrass, patches of clay and gravel |
| Structures | Warm ocean ruins, shipwrecks, ruined portals |
| Climate | Temperature 0.5, downfall 0.5 |
| Biome ID | minecraft:lukewarm_ocean (deep version: minecraft:deep_lukewarm_ocean) |
| Added in | Java Edition 1.13 (Update Aquatic, 2018) |
How to find a lukewarm ocean
You rarely need to look hard: half the seeds in our sample had a lukewarm ocean within 1,000 blocks of spawn. In our sample, 30% of a lukewarm ocean’s edge touched deep lukewarm ocean, 21% beach, 9% stony shore and 9% plain ocean. On land, savanna (7%) was the most common neighbour, so a warm, dry coastline is a good sign. From a boat, the water itself tells you: it is a brighter, lighter blue than a normal ocean.
These three Java 26.3 seeds put a lukewarm ocean close to world spawn. Each coordinate is inside the lukewarm ocean, checked at block level.
| Seed | Lukewarm ocean at | From spawn | Map |
|---|---|---|---|
-105605339272732417 |
X -390, Z -218 | 533 blocks | Open on the map |
4436417733091714673 |
X 26, Z -102 | 105 blocks | Open on the map |
-3322950757251350999 |
X 150, Z -202 | 225 blocks | Open on the map |
Already in a world? Type /locate biome minecraft:lukewarm_ocean (cheats on) for the nearest one, or paste your seed into the biome finder to see every ocean type around spawn. These are Java seeds; the same number on Bedrock gives a different world.
Does coral spawn in lukewarm oceans?
No, not in Java. Coral reefs and sea pickles only generate in the warm ocean, and using bone meal underwater only grows new coral in a warm ocean too. The lukewarm ocean floor is sand with kelp and seagrass instead. If you need coral blocks, follow the lukewarm water toward a desert coast: in our sample, 53% of a warm ocean’s edge touched desert, and 15% touched lukewarm ocean.
Lukewarm ocean vs warm ocean
They are different biomes, and the lukewarm ocean is the more common of the two by a wide margin. The table compares them with the deep lukewarm ocean, which has its own page.
| Feature | Lukewarm ocean | Warm ocean | Deep lukewarm ocean |
|---|---|---|---|
| How common (our sample) | 4.6% of the surface | 2.1% | 2.4% |
| Median distance from spawn (our sample) | 970 blocks | 2,361 blocks | 1,361 blocks |
| Coral reefs and sea pickles | No | Yes | No |
| Kelp | Yes | No | Yes |
| Fish | Cod, tropical fish, pufferfish | Tropical fish, pufferfish (no cod) | Cod, tropical fish, pufferfish |
| Ocean monuments | No | No | Yes |
| Warm ocean ruins and shipwrecks | All three | ||
The deep lukewarm ocean is the one to visit for an ocean monument, since monuments need deep water. Our ocean monument finder shows them for any seed.
Mobs in the lukewarm ocean
Cod, tropical fish and pufferfish fill the water, along with squid and small groups of dolphins. Feed a dolphin raw cod and it will swim toward the nearest shipwreck, ocean ruin or buried treasure, and swimming next to one gives you Dolphin’s Grace. Since Java 1.21.11, the nautilus spawns here as in every ocean. You tame it with pufferfish, and the lukewarm ocean has both in the same water.
The hostile mob is the drowned, which can carry a trident. Glow squid show up in dark water deep underground. Salmon and turtles do not spawn in this biome; turtles live on the beaches next to it.
Structures and loot
Warm ocean ruins, built from sandstone, sit on the floor here as well as in warm oceans. Their chests and suspicious sand can give treasure maps and enchanted gear. Shipwrecks are common too; their map chest holds a buried treasure map, which leads to a buried treasure chest with a heart of the sea. Ocean-style ruined portals can turn up on the sea floor.
What changed in 2025-26
In Mounts of Mayhem (Java 1.21.11, December 2025), the nautilus, a neutral aquatic mob you can tame with pufferfish and ride, started spawning in all ocean biomes, the lukewarm ocean included.
In Spring to Life (Java 1.21.5, March 2025), the lukewarm ocean was listed as a warm biome for the new farm animal variants. Pigs, cows and chickens don’t spawn here naturally, but one spawned here (with a spawn egg, for example) comes out as the warm variant.
Source: the official 1.21.11 and 1.21.5 release notes.
How we measured
The numbers on this page come from our own seed map engine, running Java Edition 26.3 world generation. We generated 300 random seeds and sampled every 16th block across a 10,240 by 10,240 block square centered on each world’s spawn. “How common” is the lukewarm ocean’s share of those samples; “distance from spawn” is how far the nearest lukewarm ocean sample was. The seeds above were picked from the same run, and each coordinate was re-checked at block level.
