Today's barometric pressure in San Diego, a 48-hour pressure chart, and a risk score for weather-triggered migraine and headache, based on pressure drops, humidity, and temperature changes.
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San Diego has some of the most stable barometric pressure in the country, making it relatively migraine-friendly. However, Santa Ana events and occasional Pacific storms can still cause notable pressure swings for sensitive individuals.
Worst season for migraines: January through March. San Diego has some of the most stable barometric pressure in the continental US. No month reaches the 35% of days our index uses for a trigger season, and even January sees a 5 hPa drop on only 16% of days. Winter Pacific storms bring the only significant pressure drops, and Santa Ana events occasionally reach the coast.
Common triggers in San Diego: Santa Ana wind events, winter Pacific storm fronts, marine layer transitions. San Diego's protected harbor and consistent Pacific high pressure make it one of the more favorable climates for migraine sufferers. However, the city is not immune to weather triggers, and individuals who relocate here from more volatile climates may find their threshold for pressure sensitivity actually decreases over time.
Typical pressure: San Diego averages 1016 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 1004 hPa. Swings of 3-6 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: San Diego ranks #99 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can San Diego weather trigger migraines?
Yes. San Diego experiences 3-6 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Santa Ana wind events, winter Pacific storm fronts, marine layer transitions.
What time of year are migraines worst in San Diego?
In San Diego the most barometrically volatile stretch of the year falls in January through March. That is when weather is most likely to play a part, if weather is a trigger for you at all. See when migraine weather season starts across the U.S.
Is there a barometric pressure headache forecast for San Diego?
This page works as one. Many people call a headache that arrives with a weather change a barometric pressure headache, and this forecast tracks the pressure drops, humidity and temperature swings behind that idea. The score covers the next 24 hours in San Diego and the chart shows the next 48. It is built on migraine research, so treat it as a rough guide for other headaches. A sudden, severe headache needs urgent medical care, whatever the weather.
Your own forecast
This page shows the weather risk for everyone in San Diego. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether San Diego's swings really line up with your attacks, and alerts you when conditions match your own trigger history.