A water spirit is a kind of supernatural being found in the folklore of many cultures:

African

Some water spirits in traditional African religion include:

Celtic

In Celtic mythology:

Germanic

In Germanic mythology:

Ancient Greek

In Greek mythology:

Japanese

In Japanese folklore:

Turkic

In Turkic mythology:

Mesoamerican

In Aztec belief:

Oceanic

In the mythology of Oceania:

Roman

In Roman mythology:

Slavic

In Slavic mythology:

Thai

Jain

Apakāya ekendriya is a name used in the traditions of Jainism for Jīvas that were reincarnated as rain, dew, fog, melted snow and melted hail.