The forests of the ecoregion are sustained by the moisture-bearing monsoon winds from the Bay of Bengal, which lies to the southeast. The ecoregion is bounded on the north and west by tropical dry deciduous forest ecoregions, including the Central Deccan Plateau dry deciduous forests to the southwest and west, the Narmada valley dry deciduous forests to the northwest, and the Chota Nagpur dry deciduous forests to the north and northeast. The drier Northern dry deciduous forests ecoregion, lying west of the Eastern Ghats range, is completely surrounded by the Eastern Highlands moist deciduous forests, in the rain shadow of the Ghats, which partially block the moisture-laden monsoon winds off the Bay of Bengal. The humid Orissa semi-evergreen forests ecoregion lies to the northeast in the coastal lowlands of Orissa.