how deep is the water under the golden gate bridge

The water directly beneath the Golden Gate Bridge is roughly 300–370 feet deep, with the deepest spots just over about 370 feet (around 113 meters).

Quick Scoop

Under the Golden Gate Bridge, the Golden Gate Strait forms a narrow, steep underwater channel where depths rapidly drop from relatively shallow nearshore areas to a deep central trench. Typical figures give an average of about 300 feet (91 meters) under the bridge, with measured maximum depths a bit above 370 feet (around 113 meters) in the main channel.

This depth is much greater than most of the rest of San Francisco Bay, which averages only about 12–15 feet in depth overall, making the strait beneath the bridge one of the bay’s deepest points. Strong tidal currents, the mixing of Pacific Ocean water with bay inflow, and the steep submarine topography all contribute to the impressive depth right under the span.