Muir Beach (Tamalpais Valley)

Coast, Tamalpais Valley, Marin County. We calculate high and low water here from an ocean tide model — accurate to about 5 cm on open coasts, considerably less in tidal flats and river mouths. This spot is not in any official register — there are no water samples and no classification. This is a nudist spot.

• High tide at 21:18, Low tide at 02:37 (Local time at the spot)
• Sea: Pacific Ocean
• Water temperature 16.7 °C — NOAA Geo-Polar Blended (5 km), measured 04/11/2026 04:00

Common questions about this spot

How warm is the water?

Water temperature 16.7 °C — NOAA Geo-Polar Blended (5 km), measured 04/11/2026 04:00.

When is high and low tide?

High tide at 21:18, Low tide at 02:37 (Local time at the spot).

Is nudism allowed?

This is a nudist spot.

Swimming spots in Tamalpais Valley · Marin County · Swimming spots in the United States · Pacific Ocean · On the map