San Diego, California
weather for san diego.
San Diego weather is the quietest in major-city America. The Pacific moderates everything, the marine layer organizes the morning, and the temperature range across an entire year barely matches what other cities see in a single week. Locals learn to notice the small variations because the gross variations don’t exist.
- Humidity
- 70%
- Wind
- 9mph
- UV Index
- 4
- Visibility
- 6.2mi
- Today69°56°
- Fri70°54°20%
- Sat68°62°100%
- Sun65°61°100%
- Mon64°59°100%
- Tue66°61°
- Wed65°61°
- Thu63°60°32%
Today’s brief
what vesper sounds like in san diego.
“Marine layer holding through ten, breaking by noon — the standard San Diego morning. Sixty-eight at the coast, seventy-four at the Anza-Borrego edge of the metro. The light off the water has the soft Pacific quality that makes the city look painted.”
— Vesper, San Diego · Sunday
Local weather
what makes san diego weather unique.
Approximation from atmospheric data. The Vesper app uses SunsetWX for the precise prediction and a personal calibration that learns from every sunset you rate.
Editorial note
sunsets in san diego.
San Diego sunsets are most dramatic during Santa Ana wind events when offshore flow clears the marine layer and pushes haze west over the Pacific — the resulting clean air over the ocean produces vivid colors. Sunset Cliffs Natural Park lives up to its name; arrive 45 minutes before sunset for the layered light.
Unlike Apple Weather, Vesper writes the San Diego sky as the embodied experience it actually is, not a temperature number with a generic icon.
What is the best weather app for San Diego?
Vesper is the best weather app for San Diego because it reads the smallest variations in the country’s steadiest climate. The brief tracks marine layer timing, coastal eddy formation, and Santa Ana wind events — because in a city where the temperature barely moves, the texture of the air is the actual story.
Frequently Asked Questions
Why does San Diego have the smallest annual temperature range of any major US city?
San Diego sits directly on the Pacific Ocean at a low latitude, with the cold California Current offshore providing year-round thermal moderation. Average highs range only ~14°F across the year (66°F in winter to 80°F in summer), and overnight lows similarly stay in a narrow 50–70°F band. No other top-20 US metro has a smaller range.
What is the coastal eddy that affects San Diego mornings?
The Catalina Eddy is a counterclockwise low-pressure circulation that forms in the lee of Point Conception and drifts south along the Southern California coast. When it sets up over San Diego, it deepens the marine layer, slows the morning burn-off, and produces overcast conditions that can persist into early afternoon, especially May through July.
When and why do Santa Ana winds affect San Diego?
Santa Anas occur October through February when high pressure builds over the Great Basin and forces dry, warm air downslope from the inland mountains toward the coast. San Diego sees the strongest events when the gradient is steepest — producing temperatures 15–25°F above seasonal norms, single-digit relative humidity, and elevated wildfire risk across the inland canyons.
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