Table Rolls - 5E Underwater Encounters

"In a depression in amongst the dead coral lie a dozen ogre-like creatures with fins. One keeps watch while it's exhausted companions rest." Why are these creatures fatigued?

Generated from the Underwater Locations (roll of 13) and Underwater Levels 11+ (roll of 5) tables below. Enhanced from an Encounter Activity/State table from a previous article (roll of 16).

Underwater Encounters

Encounters underwater bring visions of murky seas, vast reefs and dark depths. They might occur in a kelp bed, an underwater cave or by a long-forgotten shipwreck.

A totally different place to the surface, it is dominated by maelstroms and currents with vast tracks of open water. It is home to and reptilian sea races, tentacles beasts and primordial ancients

A pdf of these tables with more locations and encounter tables is at the DM's Guild as Table Rolls - Underwater Encounters. Includes support for Volo's and Mordenkainen's monster books.

Table Rolls - Underwater Encounters

More encounters - arctic | coastal | desert | forest | grassland | hill | mountain | swamp | underdark | underwater | urban

Underwater Locations

1d8+1d12Underwater Locations
2A quiet temple to a power of peace
3Several underwater cave entrances
4An area of coral covered in sand
5A mass of rotting seaweed
6A shell-covered shipwreck
7A giant skeleton
8An underwater cave entrance
9A shell-studded kelp bed
10A pretty bed of seaweed
11An area of dead coral
12An underwater sea stack
13An area of dead coral
14An underwater crevasse
15A channel through a coral reef
16A shell-covered line of life-like statues
17A gloomy carved underwater cave
18A damaged forest of seaweed
19An old ancients-made tomb
20A strange coral-carved hall

Underwater Levels 1-4

1d8+1d12Underwater Levels 1-4
21 Giant Shark
31d4 Sahuagin with 1 Sahuagin Priestess
41 Sea Hag and 1d2 Swarms of Quippers
51d2 Merrow
61d3 Hunter Sharks
71 Swarm of Quippers
81d3 Giant Octopi
91d4+1 Reef Sharks
102d6 Merfolk
112d6 Giant Seahorses
122d4 Sahuagin
132d6 Giant Crabs
141d2+1 Killer Whales
151d4+1 Sahuagin and 1d4 Reef Sharks
162d4 Steam Mephits
171 Giant Constrictor Snake
181d2+1 Plesiosauri
192d4 Merfolk with 2d4 Giant Sea Horses
201 Water Elemental

Underwater Levels 5-10

1d8+1d12Underwater Levels 5-10
21 Marid
32d6+2 Sahuagin led by a Sahuagin Baron
41 Aboleth
51d4+1 Giant Constrictor Snakes
64d6 Merfolk with 3d6 Giant Seahorses
71d3 Water Elementals
82d6 Sahuagin and 1d4+1 Hunter Sharks
91d4+1 Killer Whales
103d6 Sahuagin with 1d3+1 Sahuagin Priestesses
11Roll on Underwater Levels 1-4 table
124d6 Reef Sharks
132d6 Merrow
142d4 Hunter Sharks
151 Sea Hag and 2d4 Merrow
162d6 Plesiosauri
171d3+1 Giant Sharks
181 Mage and 1d4+1 Veterans with waterbreathing
19A coven of 3 Sea Hags
201 Young Black Dragon

Underwater Levels 11+

1d8+1d12Underwater Levels 11+
21 Adult Black Dragon
31 Archmage and 2d4 Gladiators with waterbreathing
42 Young Black Dragons
54d6 Merrow
61d3 Storm Giants
73d6 Killer Whales
83d6 Hunter Sharks
91 Storm Giant with 1d3 Killer Whales
102d4 Giant Sharks
11Roll on Underwater Levels 5-10 table
124d6 Sahuagin and 1d4+2 Sahuagin Priestesses led by a Sahuagin Baron
132d4 Water Elementals
142d4+2 Sahuagin Priestesses each with a Hunter Shark
151d3 Marids
161 Dragon Turtle
171 Marid and 1d4 Water Elementals
181 Sahuagin Baron and 1d4+2 Giant Sharks
191 Storm Giant and 1d2 Water Elementals
201 Kraken

More Encounters

These tables are inspired from my 5E Encounters Generator at EN World. You can find out more on Patreon and find me on Twitter @ChaosGenerators

For a PDF version of coastal encounters with more tables check out Table Rolls - Underwater Encounters on DM's Guild.