A Crisp and Seasonal Shift: San Diego Settles Into Cooler Tempos Following Windy Weekend

Morning: A Cool and Breezy Start

San Diego residents waking up this Monday, March 9, 2026, will notice a distinct change in the air. Following a weekend characterized by warm Santa Ana winds and high-velocity gusts, the region is transitioning into a much more seasonal and temperate pattern. Early morning temperatures are hovering in the mid-50s, with humidity levels starting high at approximately 81% near the coast.

As the morning progresses, the light and variable winds seen overnight will shift. Expect a southwesterly breeze to pick up between 5 and 10 mph. While the sky may start with some lingering cloud cover from the overnight period, conditions are expected to brighten quickly as we move toward the lunch hour.

Afternoon: Peak Sunshine and Mild Highs

The afternoon outlook for Monday remains pleasant, though notably cooler than the mid-80s experienced just 24 hours ago. For downtown San Diego and the coastal strips, temperatures are projected to peak near 68°F. Inland valleys may see slightly higher reaches, ranging between 70°F and 74°F. Key features of the afternoon include:

• Sky Conditions: Mostly sunny with high-altitude clouds passing through.
• Wind Activity: Southwest winds will persist, with occasional gusts reaching up to 20 mph, particularly in areas near the Interstate 8 corridor and the foothills.
• Precipitation: While some early-week models suggested a potential for light, scattered showers, the most recent data indicates that any moisture will remain light and localized, primarily affecting the mountain communities rather than the coastal basin.

Evening: Clearing Skies and Dropping Digits

As the sun sets on the first full workday of the new week, San Diegans can expect a crisp evening. Temperatures will retreat back into the mid-50s, with a projected low of 53°F overnight. The southwesterly winds will taper off to around 5 mph, leading to a calm and mostly clear night. This cooling trend is a return to seasonal norms for early March, providing a brief respite before a significant warm-up projected for later in the week.

Safety and Advisories

The National Weather Service has confirmed that the Wind Advisory which impacted the valleys and mountains through Sunday has officially expired. While no active wind or rain warnings are in place for San Diego County today, officials remind residents to remain cautious of lower rip current risks at local beaches, with wave heights maintained at 1 to 2 feet. Additionally, with the recent shift to Daylight Saving Time, commuters should be mindful of the changing light patterns during the evening rush hour.