Miladummadulu Atoll contains about 100 islands and islets lying principally on the E side; over 40 of these were populated in 1970, and almost all are wooded, with palms predominating.
Miladummadulu Atoll lies on the same submarine plateau as Tiladummati Atoll and is the continuation S of it.
The N boundary of this atoll approximately follows the parallel of 6°29'N.
The lagoon can be navigated in daylight with ease as there are few dangers, especially in the N part, but the vessel must be conned from aloft. Depths in the lagoon are moderate; the bottom is sand, with clay in places.
TidesTidal currents at Miladummadulu Atoll set ENE with the flood and WSW with the ebb, attaining a velocity of 1.5 to 2 knots at springs.
The tidal currents are greatly influenced by the prevailing monsoon currents.