SAN DIEGO, Calif. – Streetlights glowed through a veil of gray before dawn as dense fog blanketed the coast, reducing visibility across interstates and freeways from La Jolla to National City. At 5 a.m., the National Weather Service in San Diego kept a Dense Fog Advisory active until 8 a.m., warning drivers to slow down and use low beams.
The haze should burn off by midmorning as light winds mix out the marine layer, giving way to warm, clear skies. Highs will reach near 87°F inland and mid-70s along the beaches. Air quality remains good, and surf will stay calm—ideal for those finishing outdoor projects or early Halloween decorating.
Patchy fog will return late tonight and Thursday morning, though less dense than today’s event. According to meteorologists, the pattern remains steady into Halloween Friday, bringing mild sun, highs around 72°F, and clear evening air for trick-or-treaters. Light coastal breezes should keep fog at bay through sunset, leaving pleasant, dry walking conditions across the county.
The weekend looks comfortable, with highs in the low to mid-70s and cooler mornings near 60°F. Fog may return in shallow patches late each night, but no rain is expected. To be fair, it’s classic Southern California fall weather—sun by noon, fog by night, and no sign yet of winter chill.
Still, as clocks fall back early Sunday morning, shorter days will begin to hint that November—and cooler Pacific air—aren’t far behind.
Five-Day Forecast for San Diego, CA:
Wed: 87/61 – Dense Fog Advisory until 8 a.m.; sunny and warm later.
Thu: 77/60 – Patchy fog early, then sunny and mild.
Fri: 72/60 – Mostly sunny; perfect trick-or-treat weather.
Sat: 75/60 – Patchy fog, then clear and comfortable.
Sun: 73/61 – Partly sunny; calm and mild.
