Dagobah was a planet located in the Sluis sector of the Outer Rim Territories. It was a hot and humid world that was a hotbed of life, with the Tash species and numerous non-sentient creatures living on world.

Among the purest locations in the entire galaxy within the energy field known as the Force, Dagobah was a mysterious, mist-shrouded, swampy planet, mostly covered in swamps and bogs, interspersed with countless shallow lakes and lagoons and multiple living caves. It shared a mysterious time-related quality with such locales as Mortis and Ahch-To. The continental and oceanic crusts of Dagobah were only vaguely defined, and there was little in the way of volcanic activity or earthquakes. Dagobah was home to many creatures, such as bogwings, dragonsnakes, butcherbugs, sleens, vine snakes, and swamp slugs. Examples of flora included the lahdia plant, the yoghurt plant, gnarltree, and yarum seed. The planet was devoid of any advanced or indigenous civilization of sentients.

Dagobah had two seasons, a dry season and a wet season. During the peak of the long dry season (over half an orbit after the rains end) the uplands become too hot for most lifeforms to survive, necessitating any that live there to migrate to the lower lands. Beneath the rapidly leafing canopies of the gnarltrees that emerge from the receding green and thick waters, the once-inundated lowlands revert back to a marshy swamp once again. As the air grows more humid, the gray overcast clouds return and before another quarter orbit passes the planet is far enough away from its sun that the dry season ends and the rains return, again flooding the lowlands and covering the trees in water, making the uplands habitable once more.