Pacific Northwest Marine Layer

The marine layer, or coastal fog, in the Pacific Northwest is formed when warm, moist air blows over the cold waters of the Pacific Ocean and condenses. This dense fog frequently rolls over the rocky cliffs and beaches, particularly during the summer and early fall months.

The marine layer is essential for coastal redwoods, providing vital summer moisture and cooling shade. Fog supplies 30-40% of the annual water intake and is absorbed directly by the tree’s needles. Condensed fog also drips down to the forest floor like rain, watering roots and understory plants. Here are few shots of this fog.