Agate Beach County Park (Friday Harbor)

Coast, Friday Harbor, San Juan 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 officially monitored, but the responsible authority publishes no annual classification of the water quality.

• High tide at 12:59, Low tide at 16:58 (Local time at the spot)
• Sea: Pacific Ocean
• Water temperature 12.0 °C — NOAA Geo-Polar Blended (5 km), measured 19/09/2026 05:00

Common questions about this spot

How warm is the water?

Water temperature 12.0 °C — NOAA Geo-Polar Blended (5 km), measured 19/09/2026 05:00.

When is high and low tide?

High tide at 12:59, Low tide at 16:58 (Local time at the spot).

Swimming spots in Friday Harbor · San Juan County · Swimming spots in the United States · Pacific Ocean · On the map