California – A cool, slightly damp start near the coast quickly gives way to building heat across San Diego County today, with inland neighborhoods climbing toward the upper 80s by afternoon and pushing into the low 90s by Friday. The shift feels abrupt, especially as morning fog clears and strong sunshine takes over.
According to the National Weather Service in San Diego, a Heat Advisory remains in effect until 8 p.m. Friday for coastal and inland areas, including Chula Vista, Oceanside, and Escondido. Temperatures will range from the upper 80s to mid-90s away from the beaches, while coastal zones stay a bit cooler but still warm under full sun. Officials warn that heat illness is possible, particularly during peak afternoon hours.
Communities farther inland, including El Cajon and areas along I-15, will feel the most intense heat. Even typically milder coastal sections will see noticeable warmth by midday. Expect increased foot traffic at beaches as residents look for relief, though cooling may be limited during the warmest part of the day.
Drivers should watch for shifting visibility early as patchy fog lifts, especially along I-5 and coastal roads. By afternoon, glare and heat fatigue become the bigger concern. Limit strenuous outdoor activity to earlier hours, stay hydrated, and check on vulnerable neighbors. Never leave children or pets in vehicles.
This early spring heat peaks Friday before easing into the weekend, when temperatures fall back into the 70s and 80s with returning marine influence. More updates are possible if heat lingers into early next week.
Five Day Outlook for San Diego, California:
Thursday: Patchy fog early, then sunny, high near 88°F.
Friday: Sunny, high near 91°F.
Saturday: Patchy fog early, then mostly sunny, high near 86°F.
Sunday: Patchy fog early, then partly sunny, high near 81°F.
Monday: Patchy fog early, then mostly sunny, high near 78°F.
