This report is generated on Thursday, May 14, 2026, at 2:26 AM PDT.
Conditions in San Mateo County coastal areas feature cool temperatures around 50-55°F overnight with clear skies transitioning to partly cloudy. Winds blow lightly from the northwest at 5-10 knots early, building to west 15-20 knots by afternoon.[web:1][web:2]
High tide reaches approximately 6.8 feet around 8 AM PDT, while low tide drops to about 0.4 feet near midnight.[web:4]
Nearby NOAA buoy 46012 at Half Moon Bay reports average significant wave heights of 3.0-3.6 feet with dominant periods of 9-12 seconds from the northwest direction.[web:14][page:0]
Seas build to 4-5 feet this afternoon under building west winds, with surf heights along San Mateo beaches averaging 5 to 8 feet, ideal for experienced surfers.[web:2][web:8]
Water temperatures hover near 56°F, and patchy fog may linger in the morning. Average wave sizes remain moderate throughout the day.[web:14]
Raw data from NOAA, curated by Surforecast Pacificwaverider.
Credits and references: NOAA NDBC Buoy 46012 [web:14], NWS Marine Forecast [web:2], Tide data [web:4], Surf forecast [web:8].