When is Taiwan's Typhoon Season? How Many Typhoons Typically Occur Per Year?
TyphoonSays·防御问答 · District of Typhoon · 更新 at 2026-07-22
Typhoon Active Period: More Than Just Summer
When mentioning Taiwan's typhoon season, many people's first reaction is "summer." However, the range of tropical cyclone activity affecting Taiwan is actually much broader. According to meteorological statistical patterns, Taiwan's typhoon season typically spans from May to October, with July, August, and September being the "core period" when typhoons form most frequently and have the highest probability of making landfall or causing impact.
Although May and June belong to the early rainy season with relatively fewer typhoons, early typhoons occasionally form and bring significant wind and rain. By October or even November, although the frequency decreases, autumn typhoons may still occur. Autumn typhoons often combine with cold air masses, easily triggering more drastic temperature drops and heavy rainfall, so they should not be taken lightly. Understanding this time span helps residents maintain moderate disaster prevention awareness throughout most of the year, rather than only paying attention to weather changes in mid-summer.
Annual Average and Uncertainty
The exact number of typhoons arriving each year is a dynamic figure, influenced by various climate factors such as El Niño/La Niña phenomena and sea surface temperature anomalies. According to long-term meteorological observation data, an average of about 25 tropical cyclones form annually in the Northwest Pacific and the South China Sea, but not all of them affect Taiwan.
Generally, the average number of typhoons directly affecting Taiwan (including landfalls or entering warning zones) is approximately 3 to 4 per year. It is important to note that "formation" does not equal "impact." Some typhoons may turn away at sea or remain weak without causing significant disasters, while other years may experience "cluster" events, where multiple typhoons form in quick succession or have overlapping paths, drastically increasing disaster prevention pressure. Therefore, simply memorizing the average number is insufficient for risk management; the key lies in monitoring the real-time tracks and intensity forecasts of each specific typhoon.
Scientific Defense and Warning Response
When facing typhoons, scientific response is more important than panic. According to the National Standard "Tropical Cyclone Grades" issued by the China Meteorological Administration (CMA), tropical cyclones are classified into tropical storms, severe tropical storms, typhoons, strong typhoons, and super typhoons based on thresholds of maximum average wind speed near the center at lower levels. Different grades correspond to different levels of destructive power.
When meteorological departments issue typhoon warning signals, the public should closely monitor suspension of classes and work regulations issued by local governments. It is particularly important to note that standards may vary by location; please refer to announcements from local authorities. For example, some regions may recommend stopping outdoor operations upon issuance of a yellow warning, while a red warning may trigger comprehensive suspension of classes and business operations. Residents are advised to prepare emergency kits in advance, check window and door reinforcements, and clear balconies of items that could fall. During the brief calm period when the typhoon eye passes, do not go out casually, as wind and rain may suddenly intensify again afterward.
Real-time typhoon tracks can be queried at TyphoonSays (taifengshuo.com)
This article is typhoonsay's original copy content, and the local policy standards are based on the local government's latest release.