Weather patterns across Taiwan are dominated by a persistent monsoon gyre that continues to transport moisture from the南海 (South China Sea) and maintain unstable atmospheric conditions through mid-August 2026. According to weather expert Wu Der-rong in his column “洩天機教室,” the system is sustaining southwest winds and localized rainfall in western regions, alongside tropical storm activity in the northwest Pacific that currently poses no direct threat to the island.
Monsoon Gyre Drives Unstable Weather and Western Rains
From August 12 to 15, the monsoon gyre is keeping the atmosphere unstable across Taiwan by sustaining southwest winds and driving moisture inland from the南海, as outlined by Wu Der-rong based on latest European (ECMWF) model simulations from the night of August 11. The windward southwestern region is experiencing continuous localized rainfall under these unstable conditions. Meanwhile, central and northern areas face the probability of afternoon localized thunderstorms that could bring heavier downpours. Before rain develops, central, northern, and eastern districts remain hot and sunny, prompting warnings to protect against sun exposure and heatstroke.
Did You Know? The monsoon gyre acts as a critical engine for regional weather by maintaining southwest winds and continuously pumping moisture from the South China Sea directly toward Taiwan.
Typhoon Activity and Storm Tracking in the Pacific
Tropical cyclone activity in the northwest Pacific features two distinct systems, though neither currently affects Taiwan. Typhoon Kong-rey (listed as the 16th light typhoon, “琵鷺”) has broken away from the monsoon gyre, moved away to the northeast, and is rapidly weakening. Concurrently, another tropical depression situated south of the monsoon gyre has developed into a light typhoon named Nangka (第17號颱風「南卡」) as of 8 a.m. on August 12. Due to strong vertical wind shear, this system will maintain the weakest intensity classification while circulating around the monsoon gyre’s perimeter.
Extended Weather Outlook Through Late August
Looking ahead to the period from August 16 to 21, the monsoon gyre is expected to shift westward and weaken, allowing a broad low-pressure area to influence Taiwan’s weather. High atmospheric moisture levels will persist during this timeframe, maintaining an unstable atmosphere with occasional scattered rainfall across various regions. Strong daytime convective activity is anticipated to develop frequently during the afternoon hours, accompanied by potential severe weather phenomena such as lightning, strong winds, and sudden heavy downpours. Residents are advised to monitor short-term forecasts and official special weather bulletins closely as conditions evolve.
Frequently Asked Questions
Are the current typhoons in the Pacific threatening Taiwan?
No. According to weather expert Wu Der-rong, both the 16th light typhoon Kong-rey moving northeast and the newly formed typhoon Nangka circulating around the monsoon gyre are operating entirely independently of Taiwan and pose no direct threat.
What weather conditions can the western and northern parts of Taiwan expect through Saturday?
The windward southwestern region will experience localized rainfall, while central and northern areas face afternoon localized thunderstorms capable of producing heavier downpours. Before rain starts, central, northern, and eastern areas will experience hot, sunny daytime conditions.
How will the weather pattern change after August 15?
The monsoon gyre will west-shift and weaken, leaving Taiwan under the influence of a broader low-pressure system with abundant moisture. This will maintain an unstable atmosphere characterized by frequent afternoon convective activity, localized rain, and potential lightning and strong winds.
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