Questions tagged [underwater]

For questions about underwater environments, an often noteworthy or special-case environment in RPGs that frequently involve special rules or modifications to rules.

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142
votes
11answers
35k views

Can you drink a potion one-handed underwater?

I have a player who wants their PC to drink a potion underwater while one-handed, and as a DM I'm not sure how to rule it. Ask for a Dex check? What DC? Is it even possible? I couldn't find anything ...
47
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4answers
47k views

Can spells with a verbal component be cast underwater if the caster can't breathe water?

My party recently tipped over a boat of enemies into what was essentially rapids and trapped the enemies in a cube of force underwater. The warriors inevitably drowned as they had no way out. However, ...
35
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3answers
7k views

Is it possible to rest underwater if you can breathe underwater?

I'm looking at the new Warlock eldritch invocations of XGTE, and the invocation Gift of the Depths gained my curiosity. The eldritch invocation Gift of the Depths states that you can breathe ...
30
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2answers
5k views

Will this series of events work to drown the Tarrasque?

Here's the challenge: I, a level 17 Bard taught by the College of Compulsion (a homebrew subclass), am hired by some random bumpkins to go and get rid of the Tarrasque all by my lonesome, for 5 silver ...
23
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4answers
5k views

How can characters know which weapons to use underwater?

My 5th Edition party is gearing up to take a short trip underwater. They found a friendly spellcaster to cast Waterbreathing on them and they're going to locate a giant octopus lair. In preparation, I'...
22
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4answers
10k views

Is there anything that can create a fire that burns underwater?

Is there any fire-related item or spell in D&D 5e that can create a fire that can burn underwater?
22
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2answers
29k views

What happens when you cast the Fireball spell underwater?

What happens when you cast the fireball spell underwater? And does the water remain? Assume a perfectly spherical pool with a 20 foot radius and hole at the top for you to cast the fireball into the ...
16
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2answers
4k views

Are there rules for falling in water vs. diving vs. just jumping in for various depths of water?

Just realized that in DMing 5e I have unconsciously used a falling-in-water rule-of-thumb that I inherited from somewhere (maybe 2e or AD&D or maybe even Pathfinder). The ruling I've been using is ...
15
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2answers
4k views

Can you use the Fly spell to move underwater at a speed of 60 feet?

If under the effects of a Fly spell, can you move at a speed of 60 feet underwater?
15
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2answers
4k views

Can you cast the Produce Flame cantrip underwater?

Can you cast the produce flame cantrip underwater? All I could find on this subject was on p. 198 of the Player's Handbook: "Creatures and objects that are fully immersed in water have resistance to ...
14
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4answers
11k views

Assuming your PCs can breathe underwater with a spell, what is the maximum depth they can go without assistance?

If a PC has a spell or item that allows them to breathe underwater, gives them gills, or whatever other means they might acquire to not drown, what is the maximum depth they could: Descend to before ...
14
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3answers
6k views

If the Sleep spell is cast on an opponent in water, do they immediately start suffocating?

From the description of the Sleep spell: falls unconscious until the spell ends, the sleeper takes damage, or someone uses an action to shake or slap the sleeper awake. From the rules on suffocating:...
14
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1answer
1k views

Do the Gloves of Swimming and Climbing grant you a swimming speed?

The rules on Underwater Combat (PHB pg. 198) state: When making a melee weapon attack, a creature that doesn't have a swimming speed (either natural or granted by magic) has disadvantage on the ...
13
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2answers
3k views

How do Energy Effects work underwater?

This is similar to this question on fire damage underwater but a little broader. How do other energy types work underwater? I'm plumbing through the underwater level of Castle Whiterock and my ...
13
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4answers
1k views

Does Life Bubble preclude the need to add legs to sharks?

In this answer, it is suggested that the spell Life Bubble would allow a shark to survive out of water, and that the 'tolerable living conditions' would include being underwater. Given that the spell ...
11
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5answers
4k views

What happens if a part of the ocean is zapped by the Witch Bolt spell?

From what I read, the witch bolt spell (PHB, p. 289) will only hit the target. But will it hit anything else - for example, a creature swimming within 10-15 feet of the strike location? The reason for ...
11
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2answers
50k views

How does combat work underwater?

I've been a 5e player for the last 6 months or so and soon I'll be DMing for the first time, as short filler when our main campaign can't go ahead (for example, our paladin is on holidays). My ...
11
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2answers
1k views

What happens when a character puts on a “Ring of Water Walking” while already underwater?

Got into an interesting conversation with a friend about this, and neither of us were quite sure as to what the actual effect of the ring would have on someone if they were already underwater.
11
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2answers
2k views

How do attacks with an underwater target and an attacker on land (and the reverse) work?

The Underwater Combat rules on attacking state: When making a melee weapon attack, a creature that doesn't have a swimming speed (either natural or granted by magic) has disadvantage on the attack ...
10
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2answers
1k views

Do crossbows and other noted exceptions miss past their long range underwater?

The rules is written as A ranged weapon attack automatically misses a target beyond the weapon’s normal range. Even against a target within normal range, the attack roll has disadvantage unless the ...
10
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2answers
1k views

Can you charge underwater if you have a swim speed?

Can a creature with a swim speed charge underwater? I know some creatures specifically state they can run underwater, etc. If a creature is bestowed a magical swim speed, can it treat water as ...
10
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3answers
1k views

How does the Necklace of Adaption's bubble of air work out in practice underwater?

A recent question about the necklace of adaptation reminded me of an old question of my own that I've never been able to answer: Can a character wearing a necklace of adaption swim? It might seem a ...
9
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2answers
2k views

Does drowning count as a condition?

So I know we are going to some kind of underwater place next session. I was wondering if the bard could use Lesser Restoration to "fix" the drowning "condition". That is, if it counts as one.
9
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2answers
3k views

Does throwing a net underwater have disadvantage?

I was looking at the rules for underwater combat, PHB 198, and noticed ...Even against a target within normal range, the attack has disadvantage unless the weapon is a crossbow, a net, or a weapon ...
9
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2answers
5k views

How Do Combat Cantrips Function Under Water?

Underwater combat is never fun but for magic users it can be especially frustrating. Unless a character has Water Breathing or uses Alter Self they may find themselves in a situation where the DM ...
9
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4answers
2k views

Can we explore under the sea using Leomund's Tiny Airlock?

Our group is 5th level: one wizard, one barbarian and and one warlock (old_one/tome). We got one ring of swimming only, and desperately need to find a sunken ship under the moonsea. The barb can swim ...
9
votes
3answers
990 views

How to handle attacking a ship from underwater?

In a campaign I'm running, I have players who want to attack an enemy ship. Their current plan is to use Water Breathing and swim along the bottom of the body of water the ship is in to get under the ...
9
votes
2answers
624 views

Can a bard perform underwater?

We were underwater this past session and ran into an issue with the bard, who is a vocalist, and despite being able to breath underwater via the water breathing spell ran into an issue when we ...
9
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3answers
2k views

Overland Flight underwater?

Can you use a fly speed underwater? How does the spell Overland Flight interact with underwater movement?
9
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3answers
1k views

How powerful is a “Breathe Air” spell?

Land-dwelling druids can figure out a way to use magic in order to breathe underwater (, provided that they are able to cast 3rd-level spells). But what about druids that are already able to breathe ...
9
votes
1answer
840 views

Ruling for Grappling a Creature Underwater While you are on Land?

If a character is on the bank of a river and they want to reach into the water and grapple a creature in the water (assuming that they are within the size limit to be grappled) are there any special ...
9
votes
1answer
371 views

Using Arcane Eye Under Water

I have a player who wants to know if they could use Arcane Eye above and below water (or any other liquids). I initially said yes, however, after reading the spell it says, “A solid barrier blocks ...
9
votes
1answer
408 views

Does a character start drowning if stunned underwater?

The title says it all; I'm just having trouble finding a definitive answer. I suspect someone who breathes normally would lose the ability to hold their breath when stunned. Sure, they would breathe ...
8
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5answers
1k views

Help with 3D combat

I recently asked this question, in which one of the comments mentioned there might be problems with 3D combat. My campaign will be nearly entirely underwater, in the deep sea where 3 dimensional ...
8
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3answers
510 views

Incorporating smell, taste, and weather underwater

Related to this question and this question. I am interested in building up the atmosphere of my aquatic campaign, and to do so, I would like to incorporate all the players' senses. But I am at a loss ...
8
votes
1answer
432 views

Can you use Wand of Wonder underwater?

Because you can't speak normally while underwater, you can't cast spells with verbal components. So you also can't activate magic items that require command words. (https://rpg.stackexchange.com/a/...
7
votes
2answers
748 views

Does using a crossbow with the Sharpshooter feat change its range in underwater combat?

The "Underwater Combat" section of the Combat chapter (PHB, p. 198) reads: A ranged weapon attack automatically misses a target beyond the weapon's normal range. Even against a target within normal ...
6
votes
3answers
771 views

Does water pressure apply in D&D 4e [duplicate]

I plan on making an adventure, and in it they have to go deep underwater, through a tunnel, and out, but does water pressure apply in D&D 4e?
6
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2answers
303 views

Would a Decanter of Endless Water propel a boat? [closed]

In Pathfinder this magical item was recently purchased by our party member. It says that it can put out of 5 gallons of water per second from a 1ft diameter circle. How would you go about ...
6
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2answers
2k views

Does fighting underwater impair natural attacks?

In a game I'm in we have ventured underwater into the ocean. I play a summoner, my eidolon has gills, a swim speed, a Bite, 2 claws, and a tentacle attack. How would being underwater effect his damage ...
6
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2answers
1k views

What is the outcome of being under the effects of Freedom of Movement while underwater?

I know you don't take penalties to attack/damage with any type of weapon, but I'm actually looking at movement and the like. Are you able to swim freely, by choice? Do you ignore currents? Do you ...
6
votes
1answer
440 views

What effect, if any, do water-creating spells have underwater?

There are a number of spells that produce their effects by conjuring and then manipulating large volumes of water, including Watery Sphere, Tidal Wave, and Tsunami. As far as I can tell, nothing stops ...
6
votes
1answer
105 views

How does the Battle Dancer Rolling Flurry work underwater?

The Brawler archetype Battle Dancer has the Rolling Flurry feature which states : When a battle dancer uses her brawler’s flurry, she must move 5 feet before each melee attack or combat maneuver. ...
5
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2answers
3k views

How long can creatures with no swim speed travel in deep water before they die?

After answering this question about how deep can PCs go underwater, I started wondering how long can you keep swimming before you die. Here are the constraints: You can breathe underwater (ex, via ...
5
votes
1answer
187 views

Storm Kings Thunder Maelstrom Mechanics

Currently running Storm King's Thunder, and my players just got the conch of teleportation. During the next session they will be using it. The module says that you take pressure damage for being at ...
5
votes
1answer
670 views

Invisibility under water

How is invisibility treated underwater? Does the water move around them? Can they be located by displacement? Is there anything that modifies concealment? Does how thick or murky have any effect? What ...
5
votes
1answer
2k views

What happens if I cast Otiluke's Freezing Sphere while entirely submerged in water?

Otiluke's freezing sphere states: A frigid globe of cold energy streaks from your fingertips to a point of your choice within range, where it explodes in a 60-foot-radius sphere. Each creature ...
5
votes
1answer
387 views

Can I use acrobatics underwater to avoid AoOs?

My swashbuckling warblade might be fighting a dragon underwater. Can I use Acrobatics to avoid AoO while swimming underwater? Would there be a penalty, if allowed at all?
4
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2answers
3k views

Is your movement penalized underwater if you have a swimming speed but choose not to use it?

Here are the rules on underwater movement: While climbing or swimming, each foot of movement costs 1 extra foot (2 extra feet in difficult terrain), unless a creature has a climbing or swimming ...
4
votes
3answers
343 views

Can you take the run action underwater?

I have an underwater encounter coming up soon in my D&D 3.5e game. They will be entering a flooded section of dungeon. Rules say PCs can walk on the bottom, at half normal speed. (DMG, p. 92, or ...