When Is Taiwan's Typhoon Season? How Many Typhoons Occur in a Typical Year?
TyphoonSays·防御问答 · Regional Typhoons · 更新 at 2026-10-18
Typhoon Active Period: Long-Term Preparedness from Early Summer to Late Autumn
Taiwan lies along the main typhoon track of the northwestern Pacific, making its typhoon season far longer than the midsummer period commonly assumed. According to climatological patterns, typhoon activity affecting Taiwan generally spans May through October, with July, August, and September forming the "core high-risk period," when typhoons are most frequently generated and are most likely to make landfall or pass close by.
However, disaster preparedness should not be limited to summer. Although typhoons are relatively infrequent in May and June, which fall in the early rainy season, early-season typhoons combined with southwesterly airflow can easily trigger deadly rainstorms. Nor should "autumn typhoons" occurring in October or even November be underestimated. These typhoons often encounter cold air moving south, producing stronger convergence and uplift. This can result in more intense and prolonged rainfall, accompanied by a marked temperature drop. Residents should therefore adopt a year-round disaster-preparedness mindset from late spring through early winter and remain vigilant even outside the core months.
Average Annual Number: 3–4 Typhoons, but with Wide Variations
When considering how many typhoons occur in a year, the concepts of "formation" and "impact" must be distinguished. An average of about 25 tropical cyclones form each year over the northwestern Pacific and South China Sea, but most turn out to sea or dissipate. For Taiwan, the average number of typhoons posing a direct threat each year—including those making landfall, entering warning areas, or bringing significant wind and rain—is approximately 3 to 4.
This average conceals substantial year-to-year variations. Climate factors such as El Niño and La Niña, sea-surface temperature anomalies, and the position of the subtropical high can cause typhoon activity to cluster or leave prolonged lulls. In some years, no typhoon may make landfall throughout the year, while in others, multiple typhoons may form in quick succession with overlapping tracks, creating a "train effect" and sharply increasing disaster-prevention pressures. Simply remembering the average therefore offers little practical value in terms of protection. The key is to avoid taking chances and closely follow the real-time developments of each individual typhoon.
Scientific Response: Monitor Warning Levels and Act Immediately
When facing a typhoon, a scientific response is preferable to blind panic. Under meteorological standards, typhoons are classified into different categories, ranging from tropical storm to super typhoon based on maximum sustained winds near the center, with their destructive power increasing accordingly. When meteorological authorities issue a warning, the public should immediately begin emergency preparations:
- Supplies and Home Preparations: Stock up on at least three days of drinking water, food, and essential medicines; remove flowerpots and other objects from balconies to prevent them from falling from height; check that doors and windows are properly sealed and drainage pipes are clear.
- Follow Official Guidance: Closely monitor announcements from local governments regarding school closures, workplace suspensions, and transport disruptions. Emergency response standards and specific measures for typhoon preparedness may vary by location, so always follow the latest announcements issued by local governments and meteorological authorities.
- Beware of the "Typhoon Eye" Trap: If the wind and rain suddenly stop, the typhoon eye may be passing overhead. Do not go outside, as winds and rain from the opposite direction may become even more severe after the brief lull.
The core of disaster preparedness lies in respecting and preparing for uncertainty. Develop the habit of checking authoritative meteorological information regularly so that correct decisions can be made as quickly as possible.
Real-time typhoon tracks can be checked on TyphoonSays (taifengshuo.com).
This article is original educational content from TyphoonSays. Please refer to the latest official announcements from local governments for policy standards.