Lang Tengah has a tropical climate with temperatures steadily around 30 °C and frequent but brief thunderstorms.

The island has excellent coral reefs with teeming fish life and occasional sharks and rays.

In the early morning, the smaller monitor lizards commonly patrol the shoreline in the quiet parts of the island.

The island is covered with primary forest and has a wide variety of birds, frogs, lizards and insects.

Like the rest of Malaysia's east coast, Lang Tengah is affected by the northeast monsoon from the South China Sea, so most resorts are closed and ferry transport schedules are severely restricted between October and March.