San Diego Weather Alert: Fog, Cooler Temperatures, And Chance Of Showers

Kenji Nakamura

3 min read

Post on May 30, 2025

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Dense Fog Advisory

Visibility Concerns

Expect significantly reduced visibility, potentially down to less than a quarter mile in some areas of San Diego. This dense fog poses several challenges:

• Driving safety: Drive slowly, use your headlights even during the day, and increase your following distance significantly. Reduced visibility dramatically increases the risk of accidents. Avoid unnecessary travel if possible.
• Outdoor activities: Postpone outdoor activities that require clear visibility, such as hiking, biking, or any activities near the coast.
• Aviation impacts: Potential delays and cancellations are likely at San Diego International Airport (SAN). Check with your airline for flight updates before heading to the airport. The coastal weather in San Diego can significantly affect air travel.

Foggy Areas

Coastal areas and low-lying regions will be most affected by the dense fog. Inland areas may experience some fog, but to a lesser extent.

• Specific locations: Communities along the coast, including La Jolla, Pacific Beach, and Coronado, are expected to experience the most significant fog. Low-lying valleys such as Mission Valley may also see reduced visibility.
• Timing of fog: The densest fog is expected during the morning hours and overnight, typically dissipating somewhat during the midday sun. However, lingering fog is possible in shaded areas throughout the day.

Cooler Temperatures

Temperature Drop

Expect a noticeable drop in temperatures compared to recent days. The high will be significantly lower than the average for this time of year in San Diego.

• Specific temperatures: Highs are predicted to reach only the mid-60s Fahrenheit (around 18-19 degrees Celsius) in coastal areas, with slightly warmer temperatures inland. Overnight lows will dip into the upper 40s Fahrenheit (around 9-10 degrees Celsius) in many areas.
• Wind chill factor: While strong winds are not predicted, the combination of cooler temperatures and any breeze could create a wind chill factor, making it feel even colder.

Overnight Lows

Temperatures will plummet overnight, leading to chilly conditions across San Diego.

• Preparation advice: Layer your clothing, adjust your thermostat accordingly, and ensure you have warm blankets readily available.
• Protecting plants: Residents with sensitive plants should consider bringing them indoors or taking steps to protect them from potential frost.

Chance of Showers

Rainfall Accumulation

While not anticipated to be heavy, there is a chance of showers throughout the day and night. The coastal weather in San Diego can be unpredictable.

• Rainfall amounts: Total rainfall accumulation is expected to be less than a quarter of an inch, but localized higher amounts are possible.
• Timing of showers: Showers are most likely to occur during the late morning and afternoon hours, with a possibility of lingering showers into the evening.

Potential Impacts

Be aware of potential impacts such as slippery roads and reduced visibility due to the rain.

• Driving conditions: Exercise extra caution while driving in wet conditions. Allow extra time for your commute and maintain a safe following distance.
• Flood warnings: While widespread flooding is not anticipated with this amount of rainfall, be aware of potential localized flooding in low-lying areas with poor drainage.

Conclusion

This San Diego weather alert highlights the importance of being prepared for dense fog, cooler temperatures, and a chance of showers. Stay informed by monitoring updated weather forecasts from reliable sources like the National Weather Service. Remember to drive cautiously, dress warmly, and take necessary precautions to protect yourself and your property during this weather event. Check regularly for updated San Diego weather alerts and stay safe!