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# Do You Sleep Worse Around the Full Moon? Here’s What Researchers Found
- URL: https://www.astronaria.com/full-moon-sleep/
- Published: 2026-09-30T18:00:00.000Z
- Updated: 2026-09-30T18:00:00.000Z
- Description: A 2021 study tracked sleep across the lunar cycle in rural communities and a major city. The pattern held in both.
- Author: Astronaria Editors
- Tags: Health, Moon & body, #Import 2026-10-01 19:31

Researchers at the University of Washington followed members of Toba/Qom communities in Argentina and students in Seattle. In both groups, people tended to fall asleep later and sleep less in the days leading up to a full moon, a pattern published in Science Advances in 2021.

The effect was modest but consistent, even under city lights. One explanation is evolutionary: extra evening moonlight once meant extra usable hours. With the Hunter’s Moon on October 26, it’s a good week to protect your bedtime.