Random Table PDFs for Fantasy Sea Environments

Here we are looking at pdf and book titles for Fantasy Seas on Drive Thru RPG.

Disclaimer: Rand Roll is an affiliate for DriveThru RPG and DM's Guild.

Starting Points

The Fantasy Seas, home to pirates, kraken, underwater cities and a variety of magical fish. Plus seagulls, shells, seaweed, shipwrecks and many other words beginning with S.

Players love to have a ship or other way to get around the waters to explore coves, wrecks, islands and new shores.

Also of interest will be the Random Tools Guide for Sea, Ships and Pirates. Finally for more PDF titles try Random Table Titles for Fantasy.

July 2025: new titles, added ships and underwater sections; Sept 2024: new titles and sections for islands and ports. Feb 2024, added more titles

Major Titles

Some PDFs are much larger and comprehensive.

From Raging Swan Press there is Campaign Backdrop: Seas and Oceans, , with 125+ pages of tables for pirate ships, ports, ocean voyages and random encounters .
From dicegeeks is The Book of Random Tables: Pirates, with 24 d100 tables for pirate and sea themes. And also there is the Book of Random Tables: Vikings.
For pirates, ship names and water adventures, Grinning Skull has Grinning Skull's High Seas Bundle.
For various scenarios try Ocean's Call from True Mask Games. It has over 100 plothooks and seeds spread over 50 pages.
The Pirate's Treasure Bundle has 30+ PDF Titles relating to pirates, sailors and sea from Fishwife Games.

Solo Titles

For Fantasy solo games at sea with ship or a lone character, there's...

For playing solo rpgs at sea, Larcenous Designs has GamesMaster's Apprentice: Age of Sail. A deck of 120 cards with oracle decisions, scene details and many other bits of information on each card.
Sundered Isles from Shawn Tomkin is an expansion for Ironsworn: Starforged, with random tables and rules for solo games in the islands setting
For a nautical solo rpg, Doppelganger Publishing have Daydreamer solo RPG: Pirates of Low Waters. (it's a 29 page pdf / softcover, the Full-size preview seems to be best way to see what's inside)
The Sidequest Decks: High Seas, Pirates and Ports (55 cards) from Inkwell Ideas is a deck which contains a mini-adventure with sea and coastal themes.
From Double Proficiency is Wayfarer's Deck: Underwater, 52 cards with encounters, puzzles and opportunities for underwater adventures

Free and Pay What You Want Options

If you like pdfs and random tables then there are some options. And where you find one you might find more...

100 Ship Names and 50 Pirate Ship Names is a pwyw title from Pink Dice Bag Publishing for all the ships you might need to name.
Dicegeeks has a free Seafaring Encounters title, with a d100 table of sea-based encounters.
For more pirate ship names Azukail Games has a pwyw Pirate Ship Name Generator with 2 d100 tables
Infinite Archipelago from Piecewise Games is a game of sea exploration, including random tables for creating island chains, ships and sea monsters.
For more encounters Tomas Eriksson has pwyw d100 Encounters at Sea. Along with d100 Things in Shipwrecks and d100 Things on a Desert Island.
Atelier Clandestine offers 100 Bottles in the Sea, to offer answers to a sea adventures trope.

Ships

Smaller titles are easier to digest and often more focused.

For events at sea Lore Wise Games has 1d100 Plus Sailing Events, with several random tables for aquatic environments.
For ship details Healing Fireball have Just Add Dice - 100 Ship Cargos.
For making ships Equipment Maker: Ships from Ennead Games has you covered, including 15+ tables with information about seagoing craft.
Of Ships and Sea is a Advanced Dungeons & Dragons supplement with rules for DMs around ships, nautical travel, encounters and underwater adventures.

Islands

Islands come in all sizes, from barren rocks with a few birds to large isles supporting multiple terrain types.

If you need an island then 100 Fantasy Islands to Encounter from Azukail Games has examples in the title description. Other sea-themed titles include 100 Pirates to Encounter, 100 Encounters for Fantasy Oceans and 100 Encounters for Coastal Regions.
The Tropical Islands - Map-Tile Set from Black Scrolls Games is a printable or card-verision set that can make various tropical island maps.
Encounters by Environment - Islands by Troy McConnell has advice on running island encounters as well as d20 island encounters including some battlemaps. There is also Encounters by Environment - Ocean.
For ship details Healing Fireball have Two Bit Tables: Tropical Island Animal Encounters
From the Lore Observer is pay-what-you-want 5 Customizable Blank Vintage Maps Vol. 2: Scattered Archipelagos. Blank maps to fill in!

In and Under the Sea

A bit different is a catalogue of fish, from Happicat Creations is The Aquatic Explorers Handbook (An Extensive Compendium of 150 Fantasy Fish from Cold Ocean, Warm Ocean, Temperate Ocean, and Freshwater Environments). 15 d10 tables with details of fantasy fish..
The Globetrotter's Guide to Greenery: Seas & Oceans from Double Proficiency is a set of cards with interesting aquatic plants.
For under the sea, Fantasy Underwater Encounters - 1 PageTables from Chaos Gen (me) has quick options. Coastal Encounters also available.

Ports and Docks

To find more related titles by a particular publisher the "Customers Who Bought This Title also Purchased" bar at the bottom of product description is useful.

Raging Swan Press has a book of tables to describe docks and port town adventures with Urban Dressing: Port Town.
The Docks and Canals Map-Tile Set from Black Scrolls Games is a printable or card-verision set that can make various tropical island maps. There is also one for.
The Sidequest Decks: Coastal Town Quests (72 cards) from Inkwell Ideas is a deck which contains a mini-adventure with sea and coastal themes.
From dicegeeks is a pay-what-you-want title, Port Master’s Office - 1D100 Fantasy Search List

Other Titles

Things that don't fit in the other categories.

Pocket Lands: High Seas from Alexey Aparin is a 68 sea geomorphs (a deck of cards with maps that fit together). Many include arrows indicting currents.
For double-sided water tiles you have Water Tiles Without Grid from Handiwork Games, with 30 tiles as cards or digital files.
When Sea Is Calling: A Guide for Nautical Adventures from, Atelier Clandestine has random tables for creating nautical adventures and encounters. For OSR but system neutral.
From MediaStream Press is Gamemaster's Guide to Seasides and Shorelines, with over 1000 ideas for gaming in coastal areas in d100 tables
Fishwife Games has 100 Inhabitants of a Naughty Sea Side Tavern from their Pirate Lists category