These agencies include the Tropical Storm Risk (TSR) Consortium of University College London, PAGASA, and Taiwan's Central Weather Bureau.

[2] During the same day, the PAGASA issued their second and final outlook for the season for the period of July–December, where six to nine tropical cyclones were expected to develop or entered their area of responsibility between July and September, while three to five were forecast during October to December.

Torrential rainfall and strong winds from the cyclone itself and from the stormy weather that persisted for a number of days were responsible for major damage and 41 fatalities across mainland Japan.

Severe Tropical Storm Talas formed during mid-July near the Paracel Islands in the South China Sea, and traveled generally westwards.

[27] On the following day, the agency reported that "Crising" slightly intensified while moving near the Samar provinces; the intensification of the storm would prove only momentarily and weakened again.

[34] On June 12, Merbok reached its peak intensity with 10-minute winds of 100 km/h (60 mph) and a minimum pressure of 985 hPa, shortly before making landfall in Eastern Shenzhen.

[40] Nanmadol reached peak intensity at about 06:00 UTC on July 3,[40] and maintained this strength until making landfall on the western coast of Kyushu several hours later.

[40] Evacuation advisories were issued to at least 20,000 residents due to fears of possible flooding and landslides, especially in the prefectures of Niigata, Toyama and Nagano, which had experienced rainfall accumulations of up to 300 mm (12 in) in the preceding hours.

[54][34] During the next day, Kulap briefly reached its peak intensity with 1-minute sustained winds of 95 km/h (60 mph) after imagery depicted some convection over near its compact center.

[55] After moving westward in a marginally favorable environment, the JMA had reported a minimum pressure of 1002 hPa with peak 10-minute winds of 75 km/h (45 mph) during the early hours of July 24.

[56] Due to strong shear and an interaction with Typhoon Noru to its south, Kulap had rapidly weakened; therefore, both agencies issued their final advisory on July 26.

[34][58] After moving westward for a couple of days, the system strengthened into a tropical storm by both agencies while nearing the island province of Hainan, receiving the name Sonca.

Nalgae reached its peak intensity with 10-minute sustained winds of 85 km/h (55 mph) and a minimum barometric pressure of 988 hPa during August 5 for a brief time, as it was beginning to transition into an extratropical cyclone.

Banyan reached its peak strength of 150 km/h (95 mph) on August 13, without harming any land, as a Category 3 equivalent system in a high latitude, like Typhoon Songda (2016).

Sanvu did not cause any significant damage in the Northern Mariana Islands, though a 33-year-old woman drowned at Obyan beach in Saipan due to large waves on August 29.

[104] Later that day, Mawar weakened to a tropical depression and the JTWC issued their final advisory while making landfall over in Southeastern China between the cities of Shanwei and Shantou.

[107] Chinese authorities activated a natural disaster alert and response to help local civil affairs departments in areas such as the provinces of Fujian and Guandong to prepare for relief work.

[112] Several hours later, deep convection was depicted and despite moderate to high shear, the JTWC re-initiated advisories,[113] while the JMA had upgraded the system to a tropical storm, naming it as Guchol early on the next day.

[34] The remnant low would then make landfall over Pingtan County of Fujian in China late on the following day before it transitioned into an extratropical storm near Zhejiang as it merged with the cold front on September 8.

[120] Talim began to curve eastward as it rapidly weakened to a tropical storm thereafter, making landfall in Kyushu on September 17, with a path of heavy rainfall up to the region east of Tokyo.

[123] On September 9, the Joint Typhoon Warning Center (JTWC) began monitoring on a tropical disturbance that had developed about 836 km (519 mi) west-northwest of the province of Eastern Samar.

[153] After the slow consolidation, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert to the elongated system early on October 14,[154] shortly after the Japan Meteorological Agency (JMA) started to monitor it as a low-pressure area.

[156][157] In the afternoon, the JTWC also upgraded it to a tropical depression assigning the designation 25W, which formative but shallow convective bands had become more organized, and symmetrically wrapped into a defined low-level circulation center.

[158] About three hours later, the JMA upgraded it to the twenty-first Northwest Pacific tropical storm in 2017 and assigned the international name Lan, when it was located approximately 310 km (190 mi) to the northeast of Palau.

[159] Early on October 16, the JTWC upgraded Lan to a tropical storm too, based on T-number 2.5 of the Dvorak technique,[160] shortly before it entered the Philippine Area of Responsibility and received the name Paolo from PAGASA.

[166] Initially, its forecast stated that 26W would intensify into a weak tropical storm, although due to a disorganized center with strong shear, the JTWC issued their final advisory on October 19 as it was being absorbed by the outflow of nearby Typhoon Lan.

Initially forecast to intensify to a tropical storm, the system rapidly deteriorated and degenerated to a remnant low on November 3 as it tracked into the Gulf of Thailand.

[192] It entered the Philippine Area of Responsibility nine hours later, receiving the name Urduja[193] On 21:00 UTC of that same day, the JTWC upgraded the system to a tropical depression and also began issuing advisories, giving the identifier 32W.

[198][123] During December 16, the JMA reported that a tropical depression had developed about 950 km (590 mi) to the southeast of Guam, before they reclassified it as an area of low pressure during the following day.

[218] A tropical depression formed about 700 km (435 mi) northeast of Wake Island late on July 25, though the JTWC indicated it as a subtropical system with estimated recorded winds of 65 km/h (40 mph).