San Mateo County coastal waters are experiencing mild summer conditions today with mostly cloudy skies clearing to partial sunshine as coastal temperatures peak near 59°F along the beaches. Light morning winds are shifting out of the west to northwest this afternoon at 10 to 15 knots, generating a light chop across inner marine zones including Half Moon Bay, Pacifica, and the open waters off Pillar Point.
Offshore buoys reveal steady North Pacific ocean energy with the average wave sizes hovering between 3 and 4 feet across the region. Regional instrumentation at the Half Moon Bay Buoy (Station 46012) and San Francisco Buoy (Station 46026) indicates a primary northwest swell running at 3 feet with an 8-second period, which is tightly paired with a secondary long-period southern hemisphere groundswell registering at 2 feet with a 14-second interval.
Tidal movements along the peninsula follow a standard semi-diurnal cycle today. A brief high tide crested earlier this morning at 9:30 AM reaching 3.7 feet, while the subsequent low tide is scheduled to bottom out later this afternoon at 4:15 PM at a depth of 0.8 feet before rising slowly toward a modest late evening high tide.
Tomorrow promises a continuation of this stable July pattern with patchy morning fog giving way to afternoon sun. Marine conditions will remain highly consistent as west winds hold steady around 10 to 15 knots and combined sea heights persist in the 3 to 4 foot range, keeping local beaches and nearshore waters hospitable for regional maritime activity.
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