Moon tonight · San Diego, CA
Moon Phase Tonight in San Diego, CA
Tonight's Moon in San Diego, CA is a first quarter, 44% illuminated, rising Sun, Oct 18, 2:04 PM PDT and setting Sat, Oct 17, 11:21 PM PDT.
Live moon phase and illumination with local moonrise, moonset and transit times for San Diego, CA, plus how tonight's moonlight affects stargazing and aurora viewing.
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First Quarter
44% illuminated · 7.3 days into the lunar cycle
Moonrise
Highest in sky
Moonset
Local time (America/Los Angeles), next events after this page was generated. Calculated with astronomy-engine for 32.72°, -117.16°.
Local sky conditions
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Moon impact on stargazing & aurora
At 44% illumination moonlight is moderate: a strong aurora still shows, but faint activity and dim nebulae are washed out while the Moon is up.
Aurora at 32.7° latitude generally needs about Kp 9.0.
Moon tonight in San Diego: common questions
What is tonight's moon phase in San Diego, CA?
Tonight's Moon in San Diego, CA is a First Quarter, about 44% illuminated and 7.3 days into the lunar cycle, calculated for 2026-10-17 (UTC). The phase is the same worldwide; its tilt and the times it is above the horizon depend on your location.
What time is moonrise and moonset in San Diego, CA tonight?
The next moonrise in San Diego, CA is Sun, Oct 18, 2:04 PM PDT and the next moonset is Sat, Oct 17, 11:21 PM PDT (local time, America/Los Angeles). Times are calculated from the city's coordinates with the astronomy-engine library and refer to the geometric rise and set of the Moon's upper limb.
How does tonight's moonlight affect stargazing and aurora viewing in San Diego, CA?
At 44% illumination moonlight is moderate: a strong aurora still shows, but faint activity and dim nebulae are washed out while the Moon is up. Check clear-sky and aurora conditions for San Diego, CA on the linked aurora and sky-tonight pages before heading out.