San Diego, Calif. – The coastal dawn breaks in soft amber light, the air still and mild as the Pacific glows silver offshore. It’s another picture-perfect fall morning across San Diego County, and the warmth will keep building through midweek. By Wednesday, inland valleys could brush the upper 80s — a gentle reminder that even at the doorstep of November, Southern California still has summer left to spend.
According to the National Weather Service in San Diego, Tuesday will bring highs near 78°F downtown, rising to around 87°F Wednesday before a slow cooldown begins Thursday. Winds remain light, with gentle west and northwest breezes up to 10 mph each afternoon. Clear skies will dominate, though coastal fog may redevelop late at night and linger briefly through early mornings. Drivers along I-5 and Highway 78 should watch for reduced visibility near Encinitas and Carlsbad around dawn.
Halloween week looks dry, mild, and nearly ideal for outdoor events. Trick-or-treaters across San Diego, Chula Vista, and Escondido can expect light winds and evening temperatures in the upper 60s — perfect for walking the neighborhoods without the chill common this time of year.
By Saturday, the pattern begins to ease toward more typical November conditions as ocean breezes strengthen and daytime highs slide into the mid-70s. Models hint at a slight marine push early next week — perhaps the first whisper of late-fall change along the Southern California coast. After all, even paradise cools a bit by November’s open.
Five-Day Forecast for San Diego, CA:
Tue: 78/63 – Sunny; light west breeze.
Wed: 87/62 – Warm and clear; near-record heat inland.
Thu: 81/60 – Mostly sunny; patchy morning fog.
Fri: 75/59 – Mild, breezy; clear Halloween evening.
Sat: 76/61 – Sunny; cooler air builds into Sunday.
