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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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36
votes
4answers
28k 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, ...
137
votes
10answers
33k 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
1k 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 ...
14
votes
2answers
3k 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 ...
13
votes
2answers
2k 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 ...
8
votes
2answers
3k 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 ...
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'...
10
votes
2answers
34k 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
votes
2answers
592 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 ...
14
votes
4answers
7k 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 ...
6
votes
2answers
859 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
477 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 ...