The 1965 Pacific typhoon season has no official bounds; it ran year-round in 1965, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.
The scope of this article is limited to the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes; see 1965 Pacific hurricane season. Tropical Storms formed in the entire west pacific basin were assigned a name by the Joint Typhoon Warning Center. Tropical depressions in this basin have the "W" suffix added to their number. Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration or PAGASA. This can often result in the same storm having two names.
40 tropical depressions formed this year in the Western Pacific, of which 35 became tropical storms. 21 storms reached typhoon intensity, of which 11 reached super typhoon strength.
Possibly regenerated into Typhoon Patsy.
A surge in the southern hemisphere indraft developed into Tropical Depression 11W on June 12 to the east of the Philippines. It tracked west-northwestward, quickly strengthening to a tropical storm that day and a typhoon on the 13th. Dinah continued to quickly intensify as it turned to the northwest, and attained a peak of 185 mph on the 17th to the northeast of Luzon. Its southerly inflow was cut off, and Dinah weakened as it turned to the north. It hit southern Taiwan on the 18th as a 140 mph typhoon, and weakened greatly over the island to a tropical storm. At this time, Dinah exhibited a rare false radar eye. Dinah turned to the northeast, where it became extratropical near Japan on June 20. The storm killed 45 people on its path, and destroyed 5000 homes on Taiwan.
160 mph Super Typhoon Freda, which began its life on July 6, hit northern Luzon on the 13th. It crossed the island and the South China Sea, where it hit Hainan Island as a 115 mph typhoon on the 15th. Freda dissipated the next day over China, after causing heavy flooding killing an unknown number of people. In Hong Kong Freda killed 2 people.
Harriet hit Tawian as a Category 3 typhoon.
Super Typhoon Jean, after reaching a peak of 160 mph on August 3, weakened slightly to hit southwestern Japan as a 150 mph super typhoon on August 5. The typhoon brought heavy winds to Southern Japan before becoming extratropical on the 7th. Typhoon Jean killed 28 people throughout Southern Japan.
On August 14 a tropical depression formed and was named Lucy after it became a tropical storm. Lucy became a typhoon and soon into a 175 mph super typhoon. Lucy weakened and struck Japan as a minimal typhoon. Lucy dissipated on August 24.
175 mph Super Typhoon Mary weakened from its peak to hit eastern Taiwan on August 18 as a 105 mph typhoon. The typhoon brought strong winds and heavy rain before dissipating over China on the 20th.
130 mph Typhoon Shirley, after weakening from a peak of 150 mph, hit southern Japan on September 10, causing moderate damage and heavy rain. Resulting floods and landslides killed 67 people and left 6 missing.
Typhoon Trix struck central Honshū Island in Japan just days after Typhoon Shirley. Trix caused heavy rains 98 people were killed and 9 were missing due to the resulting flooding and landslides.
Tropical Storm Agnes struck Hong Kong killing 5 people.
Bess was the strongest storm of the season. The storm formed on September 27 northeast of Palau and dissipated on October 6 north of Japan.
Carmen's central pressure in the vicinity of Agrihan was rapidly falling, sometimes 970 hectopascals at 18:00 UTC on October 5, and rapidly decreased to 914 hectopascals at 18:00 UTC on October 6, and reached a maximum wind speed of 175 miles per hour (282 km/h). On 7 October 1965 seven Japanese fishing vessels capsized in the stormy seas. According to the Japan Coast Guard official confirmed report, 209 crewmen were killed.