List of off-season Pacific hurricanes

There have been 23 recorded tropical and subtropical cyclones in the eastern Pacific basin outside the official Pacific hurricane season. The National Hurricane Center (NHC) monitors the area from North America westward to 140°W, while the Central Pacific Hurricane Center is from 140°W to the International date line, north of the equator. The National Oceanic and Atmospheric Administration (NOAA) currently defines the season as starting May 15 in the eastern Pacific and June 1 for the central Pacific and ending on November 30 for both regions in each calendar year. Occasionally, however, storms develop in late November and persist until December, such as Hurricane Nina of 1957.

Few off-season tropical cyclones in the east Pacific have affected land, and none of them have made landfall. Only Hurricane Nina caused both property damage and fatalities. The strongest hurricane between December and May was Hurricane Ekeka in 1992, which reached winds of 115 mph (185 km/h). However, after Tropical Storm Paka crossed the International Date Line, it intensified into a typhoon with winds equivalent to a Category 5 hurricane on the Saffir-Simpson hurricane wind scale. The most recent off-season storm was Tropical Storm Adrian in early-May 2017.

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