Dense Fog Advisory Issued for Coastal Areas in San Diego

Coastal highway shrouded in dense fog at night with vehicle headlights illuminating the way.

San Diego, CA, December 20, 2025

A Dense Fog Advisory has been announced for coastal areas of San Diego County, warning of visibility dropping to one-quarter mile or less. This advisory is in effect from 9:08 PM until 8:00 AM the following morning, potentially leading to hazardous driving conditions. Residents are urged to exercise caution while navigating fog-covered roads by slowing down, using headlights, and maintaining safe distances from other vehicles. Local authorities emphasize the importance of staying informed and resolving to adhere to safety recommendations during this period.


San Diego, CA – A Dense Fog Advisory has been announced for coastal areas of San Diego County, starting from 9:08 PM PST on December 18, 2025, and lasting until 8:00 AM PST on December 19, 2025. This advisory indicates that visibility could drop to one-quarter mile or less due to thick fog, potentially leading to hazardous driving conditions. Local residents and travelers are encouraged to exercise caution during this period, adjusting their driving behaviors to enhance safety.

The National Weather Service (NWS) issued this advisory to alert motorists about reduced visibility levels, which can create challenging situations on the roads. The NWS recommends that drivers slow down, utilize their headlights, and keep a safe distance between vehicles while navigating through fog-covered areas. As fog is expected to linger until the morning, the public has been advised to stay vigilant and mindful of the changing road conditions.

Dense fog advisories are significant as they help inform the community about hazardous weather that can dramatically affect travel and safety. Visibilities of one-quarter mile or less are expected during this advisory, and conditions may impair the ability to navigate safely. Thus, residents should remain informed about the weather and adhere to safety recommendations while driving in these conditions.

### Key Facts about the Dense Fog Advisory

#### Understanding the Advisory
A Dense Fog Advisory is declared when widespread visibility challenges are anticipated for three hours or more, indicating unsafe conditions for drivers. The advisory in San Diego is a reminder of the unpredictable nature of weather and its impact on everyday life.

#### Advisory Duration and Expectations
Issued at 9:08 PM PST on December 18, 2025, this advisory remains in effect until 8:00 AM PST on December 19, 2025. It is critical for the community to stay updated as visibility should begin to improve following this period.

#### Safety Recommendations for Drivers
To ensure safety during low visibility conditions, drivers must:
– Slow down their speed.
– Use vehicle headlights.
– Maintain ample distance between cars to avoid potential accidents.

### Conclusion
As San Diego residents prepare to navigate through this dense fog, understanding and adhering to safety protocols is vital. Local entrepreneurs and businesses can also benefit from this awareness, emphasizing the importance of community resilience in the face of nature’s unpredictability. Supporting local safety initiatives and staying informed about weather advisories can foster a stronger, more connected San Diego.

To further our community’s safety and economic fortitude, remember to support small businesses and local initiatives that contribute positively to the San Diego economy.

Frequently Asked Questions

What is a Dense Fog Advisory?

A Dense Fog Advisory is issued when widespread visibilities are expected to be one-quarter mile or less for three hours or more, making driving conditions hazardous. Drivers are advised to slow down, use headlights, and maintain ample distance between vehicles.

When was the Dense Fog Advisory for San Diego County Coastal Areas issued?

The advisory was issued at 9:08 PM PST on December 18, 2025, and was in effect until 8:00 AM PST on December 19, 2025.

What should drivers do during a Dense Fog Advisory?

Drivers should slow down, use headlights, and maintain ample distance between vehicles to ensure safety during low visibility conditions.

Feature Details
Advisory Issued 9:08 PM PST on December 18, 2025
Advisory Duration Until 8:00 AM PST on December 19, 2025
Visibility One-quarter mile or less
Impacts Hazardous driving conditions
Recommendations Slow down, use headlights, maintain ample distance between vehicles

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STAFF HERE SAN DIEGO WRITER
Author: STAFF HERE SAN DIEGO WRITER

The SAN DIEGO STAFF WRITER represents the experienced team at HERESanDiego.com, your go-to source for actionable local news and information in San Diego, San Diego County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Comic-Con International, San Diego County Fair, and San Diego Pride Festival. Our coverage extends to key organizations like the San Diego Regional Chamber of Commerce and United Way of San Diego County, plus leading businesses in biotechnology, healthcare, and technology that power the local economy such as Qualcomm, Illumina, and Scripps Health. As part of the broader HERE network, including HEREAnaheim.com, HEREBeverlyHills.com, HERECostaMesa.com, HERECoronado.com, HEREHollywood.com, HEREHuntingtonBeach.com, HERELongBeach.com, HERELosAngeles.com, HEREMissionViejo.com, and HERESantaAna.com, we provide comprehensive, credible insights into California's dynamic landscape.

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