Today's barometric pressure in Honolulu, a 48-hour pressure chart, and a risk score for weather-triggered migraine and headache, based on pressure drops, humidity, and temperature changes.
Loading live forecast for Honolulu...
Honolulu's mid-Pacific location means generally stable pressure with trade winds providing consistent conditions. However, Kona storms and tropical systems can bring unexpected pressure drops, and the transition between wet and dry seasons shifts baseline patterns.
Worst season for migraines: January through March. Honolulu has the calmest pressure of the 100 metros in our index. No month reaches the 35% of days our index uses for a trigger season, and even January sees a 5 hPa drop on only 2% of days. Kona storms and cold fronts from the northwest bring what drops there are.
Common triggers in Honolulu: Kona wind storm pressure drops, trade wind disruptions and humidity shifts, volcanic haze (vog) from Kilauea reducing air quality. Honolulu sits on the south shore of Oahu, sheltered from prevailing northeast trade winds by the Ko'olau Range. This mountain barrier creates dramatic weather differences between windward and leeward sides of the island, sometimes within just a few miles. Volcanic haze from the Big Island's Kilauea volcano drifts to Oahu during light wind periods, adding sulfur dioxide and particulate triggers to the already humid tropical air.
Typical pressure: Honolulu 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 1003 hPa. Swings of 2-3 hPa over 24 hours are typical here, mostly below the 5 hPa drops our index counts.
2026 index: Honolulu ranks #100 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Honolulu weather trigger migraines?
It can, though that is rare here. Honolulu usually sees 2-3 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Kona wind storm pressure drops, trade wind disruptions and humidity shifts, volcanic haze (vog) from Kilauea reducing air quality.
What time of year are migraines worst in Honolulu?
In Honolulu 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 Honolulu?
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 Honolulu 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 Honolulu. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Honolulu's swings really line up with your attacks, and alerts you when conditions match your own trigger history.