San Diego, Calif. – A soft marine haze settled over the coast before dawn Monday, a familiar fall sign across San Diego County. The early morning calm will give way to bright sunshine later today, but coastal fog is expected to make a return through midweek — keeping drivers and early commuters on alert along I-5, I-8, and coastal arterials.
According to the National Weather Service in San Diego, patchy fog will form late Monday night into Tuesday morning, especially near the beaches and lower valleys. Visibility could briefly dip below one mile in pockets near La Jolla, Pacific Beach, and Chula Vista. The fog will lift quickly after sunrise, revealing another mild and comfortable afternoon with highs in the mid-70s along the water and upper 70s inland. Winds stay light from the northwest, adding to the region’s stable, late-October pattern.
The onshore flow keeps the marine layer active through Wednesday, with some gradual clearing later in the week. For those planning early-morning flights or coastal drives, expect damp pavement and limited visibility before 9 a.m. each day. Outdoor events and surf conditions remain largely unaffected, though cooler mornings may have a brisk, salty edge.
By Thursday, the region’s steady warmth begins to waver slightly as Pacific moisture edges closer from the west. Models hint at a subtle temperature dip next weekend — possibly the first hint of the seasonal cooling trend that marks the true end of Southern California’s long, golden fall stretch.
Five-Day Forecast for San Diego, CA:
Mon: 76/59 – Mostly sunny; calm winds, mild.
Tue: 73/60 – Patchy fog early; sunny afternoon.
Wed: 70/58 – Partly cloudy; light coastal breeze.
Thu: 71/58 – Mostly sunny; mild and steady.
Fri: 74/59 – Patchy fog early; bright afternoon.
