SAN DIEGO – A soft gray fog rolls over the bay this morning, swallowing the harbor lights and muting the hum of traffic along I-5. But by late morning, the marine layer will burn off, revealing that signature California blue sky — the start of a warm, sunny stretch that will carry through Halloween week.
According to the National Weather Service in San Diego, patchy fog lingers into midmorning before giving way to clear skies and mild temperatures near 71°F. Inland valleys warm faster, reaching the mid-70s under light westerly breezes. Visibility could drop below a mile along coastal routes early today, so drivers should slow down and use headlights until late-morning clearing.
By Monday, warmth spreads across San Diego County. Highs climb into the upper 70s and lower 80s, with gentle winds and low humidity creating ideal fall conditions. Tuesday and Wednesday stay bright and steady, hovering near 81°F — great for outdoor plans, late-season gardening, or early Halloween decorations.
The marine layer drifts back briefly late Wednesday into Thursday, bringing another round of early fog before clearing to sunshine by midday. Halloween Friday looks pleasant, with light breezes and evening temperatures in the upper 60s — just cool enough for costumes.
Looking beyond, forecasters hint that the first chilly November air could arrive the following week. Until then, San Diego basks in a golden stretch of calm, coastal perfection.
Five-Day Outlook for San Diego, CA:
Sun: 71/59 – Fog early, then sunny.
Mon: 74/60 – Bright and mild.
Tue: 81/62 – Warm; light breeze.
Wed: 81/62 – Mostly sunny.
Thu: 78/60 – Fog early, then clear.
