Tomorrow's Weather / Nationwide Weather Shift with Heavy Rain! Six Consecutive Days of 'Torrential Downpours' – A New Typhoon Possible After This Day

The Central Weather Administration has released its latest weather alert! For the coming week, Taiwan will continue to be affected by a 'major low-pressure zone,' resulting in significantly increased moisture. Areas south of Yunlin must remain highly vigilant against localized torrential rains. There is also a high probability of heavy rain in regions south of Hsinchu. The administration warns that in addition to intense rainfall, humidity will remain high across all regions even before rain begins, with some areas experiencing localized temperatures above 36°C.

Tomorrow's Weather: Low-pressure zone to affect the entire island—prepare for intense rainfall! 'Localized torrential rains' expected to explode in areas south of Yunlin

Lai Hsin-kuo, a forecaster at the Central Weather Administration, explained that rainfall trends across regions during the low-pressure period can be divided into three major phases. According to the administration, the peak moisture will occur tomorrow, Monday (17th), when areas south of Yunlin must pay special attention to localized torrential rains. Regions south of Hsinchu should prepare for localized heavy rain and afternoon thunderstorms.

Weather for the Coming Week: Full rainfall timeline revealed! These days will see the highest moisture levels, with thunderstorms erupting across Taiwan

· Monday to Tuesday (August 17–18) Weather: Low-pressure zone impact—prepare for localized torrential rains

On Monday and Tuesday (17th–18th), the low-pressure zone will continue to affect the region. Southern and eastern Taiwan will experience localized brief showers. Isolated brief showers are expected along the northern coast of Keelung and in the Greater Taipei area. In the afternoon, localized brief thunderstorms will occur in western and eastern mountainous areas, with a risk of localized heavy rain south of Hsinchu. On Monday (17th), areas south of Yunlin should be especially alert for localized torrential rains.

· Wednesday to Friday (August 19–21) Weather: Rainfall area expands—brief showers or thunderstorms expected

From Wednesday to Friday (19th–21st), moisture will increase further, with localized brief showers or thunderstorms occurring across all regions of Taiwan. The rainfall area will expand, with localized heavy rain expected in central-southern and southeastern Taiwan, and slightly heavier rain possible in other regions.

· Saturday to Sunday (August 22–23) Weather: Localized heavy rain in southern Taiwan

Starting Saturday (22nd), moisture will gradually decrease. Southern Taiwan will still experience localized heavy rain, while other areas will see afternoon thunderstorms (with heavy rain possible in central-northern regions and mountainous areas). On Sunday (23rd), moisture will decrease further, with southern Taiwan seeing localized brief showers or thunderstorms, while other areas shift to afternoon thunderstorms. Rainfall will gradually ease, but afternoon heat convection will remain strong.

Rainfall trends for the coming week. (Image: Central Weather Administration)

Still muggy before rain! Watch for 36°C+ highs in Greater Taipei, Taoyuan, Hsinchu, Changhua, Yunlin, Nantou, and Hualien

Despite increased moisture, high temperatures across Taiwan before rainfall remain significant:

· Regional temperatures: Western Taiwan may reach 34–35°C before rain, while eastern Taiwan will be around 32–33°C.

· High-temperature warning: Localized areas in northern and inland central Taiwan may exceed 36°C.

· Hotspot regions: Greater Taipei, Taoyuan, Hsinchu, Changhua, Yunlin, Nantou, and Hualien should pay special attention to localized temperatures above 36°C.

Temperature trends for the coming week. (Image: Central Weather Administration)

Will there be a new typhoon? Tropical system developing near Guam? Central Weather Administration reveals latest observations

Regarding distant ocean systems, the administration notes that a vast low-pressure zone currently stretches from the South China Sea to the waters east of Guam, bringing increased moisture to Taiwan. Within this low-pressure zone, tropical cloud clusters are continuously forming and dissipating.

Will the tropical system near Guam develop into a typhoon affecting Taiwan?

Latest data suggests a tropical system may develop near Guam by next weekend, potentially moving toward the waters south of Japan. However, due to the distant timeframe, forecast uncertainty remains high. The administration will continue close monitoring.