Hurricane Fico was the longest-lived hurricane of the 1978 Pacific hurricane season and became the longest-lasting Pacific hurricane on record, a record broken by Hurricane Tina fourteen years later. The sixth tropical storm, fourth hurricane, and third major hurricane, Fico developed from a tropical disturbance off the Pacific coast of Mexico on July 9. It moved northwestward and then westward, quickly reaching peak winds of 140 mph (230 km/h) on July 12. Moving nearly due westward, the intensity of Fico fluctuated from Category 1 to Category 4 status on the Saffir–Simpson hurricane scale for the following days, and it passed about 170 miles (270 km) south of Hawaii on July 20 with winds of 115 mph (185 km/h). Fico slowly weakened as it turned to the northwest over cooler waters, and became an extratropical cyclone on July 28 to the northeast of Midway Island.

The 1978 Pacific hurricane season was the first Pacific hurricane season to use both masculine and feminine names for tropical cyclones. It also began the modern practice of utilizing naming lists every six years. Despite lacking an El Niño, a common driver of enhanced activity in the East and Central Pacific basins, the 1978 season was active. It featured 19 named storms, 14 hurricanes, and 7 major hurricanes, the latter of which are Category 3 or stronger cyclones on the Saffir–Simpson scale. Within the confines of the Central Pacific basin, located between the International Date Line and 140°W, 13 tropical cyclones or their remnants were observed by forecasters at the Central Pacific Hurricane Center, a record number of occurrences at the time. Seasonal activity began on May 30 and ended on October 21, within the limits of a traditional hurricane season which begins on May 15 in the East Pacific and June 1 in the Central Pacific. The season ends on November 30 in both basins. These dates conventionally delimit the period during each year when most tropical cyclones form.