San Luis Obispo County coastal areas are experiencing mostly clear to patchy morning fog conditions with daytime high temperatures reaching around 63°F to 68°F along the beaches and a low near 55°F tonight. Coastal winds from the northwest are blowing at 10 to 15 knots with gusts reaching up to 20 knots during the afternoon, maintaining a moderate breeze along exposed shorelines.

Nearby offshore buoys including Cape San Martin and Diablo Canyon indicate a primary swell from the northwest averaging 4 to 5 feet at a 7-second period, combined with a secondary southern swell measuring 2 feet at 15 seconds. Average wave sizes along outer beach breaks range between 3 and 5 feet, creating slight to moderate sea conditions across open ocean waters.

At Port San Luis, water level observations record a morning high tide of approximately 3.5 feet occurring around 2:48 AM, followed by a low tide near 0.8 feet at 7:59 AM. A second afternoon high tide will peak near 4.8 feet later in the day, providing typical tidal fluctuations for marine navigation and coastal activities.

Tomorrow's outlook promises persistent northwest winds easing slightly to 5 to 10 knots in the morning before building back to 10 to 15 knots in the afternoon, with combined seas holding steady around 3 to 4 feet under partly cloudy skies.