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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47
votes
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, ...
22
votes
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 ...
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 ...
16
votes
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
votes
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 ...
15
votes
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?
9
votes
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 ...
11
votes
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 ...
13
votes
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 ...
11
votes
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 ...
23
votes
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'...
14
votes
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 ...
8
votes
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 ...
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
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 ...
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 ...
3
votes
1answer
17k views

What happens to lightning spells underwater?

As the old adage goes "water and electricity don't mix" because in real life water has impurities in it that make it super conductible. So what would happen in D&D if, for instance, a sorceress ...
3
votes
2answers
292 views

Underwater Druidic Spellcasting

I've recently started building an underwater campaign, where most of the action will take place underwater. One of my players has brought to my attention the druidic spell list. They start at level 10,...