As Fefa turned more to the west, it paralleled the cooler waters, allowing the eye to remain distinct as the hurricane remained well-organized. Despite moving over marginally warm sea surface temperatures and becoming involved with the Stratocumulus cloud field to its north, the hurricane restrengthened on August 4 to reach a secondary peak intensity of 105 mph (170 km/h) while located about 1,265 miles (2,070 km) east-southeast of Hilo, Hawai'i. After maintaining 105 mph (170 km/h) winds for about 18 hours, Fefa weakened slightly due to increasing wind shear from a cold-core trough as it entered the Central Pacific Hurricane Center area of responsibility. As the shear increased, the cyclone weakened more rapidly, and on August 6 it weakened to a tropical storm while located about 650 miles (1,060 km) east of the island of Hawaii. Initially, forecasters predicted Fefa to turn to the northwest to the north of the Hawaiian Islands. However, the storm continued moving almost due westward as it steadily weakened. Aircraft reconnaissance flew into Fefa three times as it neared Hawaii. Late on August 7, Fefa weakened to a tropical depression a short distance of the island of Hawaii, and early on August 8 the depression began dissipating and degenerated into a tropical wave after moving onshore. The remnants tracked west-northwestward and passed south of the Hawaiian Islands until dissipating on August 9 to the northwest of Kauai.