140 ha
Loch na h-Oidhche is a remote freshwater loch lying between Loch Torridon and Loch Maree in the Flowerdale Forest, Wester Ross, Scotland. It is approximately 4.5 mi north of the small village of Torridon and 8 mi southeast of Gairloch. The loch is oblong in shape and trends north by northwest to south by southeast.