Typhoon Season by Country: When Japan, Korea, Taiwan and the Philippines Actually Get Hit

"Typhoon season" is usually written as though it were one season across one region. It is not. The window that matters is different in every country, and in some of them it is much narrower than the headline suggests.

This is a planning article rather than a forecast one. If you are choosing dates for a trip to East or Southeast Asia, this is the part that is knowable in advance.

The basin, first

Western Pacific typhoons form year-round. That is the first thing that separates this basin from the Atlantic, which has a defined hurricane season with a start and an end date.

There is no month in which a typhoon is impossible in the western Pacific. What changes is the frequency, and where the storms go once they exist.

Activity concentrates roughly from July through October, with a peak that most years sits in August and September. Storms that form outside that window tend to track further south and west, which is why the risk profile by country shifts through the year.

The Philippines

The most exposed country in the basin, and the longest window.

The Philippines sits directly in the path of storms crossing the western Pacific, and it takes more landfalls than anywhere else in the region. Roughly twenty storms enter its area of responsibility in an average year, with a substantial fraction making landfall.

The active period runs from around June to December, which is longer than most travellers expect. The peak is usually July through October.

The regional detail matters here. Northern Luzon takes the most direct hits. The Visayas are exposed particularly in the later part of the season. Mindanao, in the far south, is hit comparatively rarely, which is why it is often the more reliable choice for late-season travel.

Taiwan

A short, intense window.

Taiwan's exposure is concentrated between July and September, with some activity either side. The island sits in the recurve zone, where storms tracking west often turn north, and its mountains mean that even a glancing storm can produce extraordinary rainfall.

The practical consequence for travellers is that Taiwan's disruption is often about rain and landslides rather than wind. Mountain roads close. The east coast and the central mountain areas are the most affected.

Outside that window Taiwan is comparatively reliable, and the autumn from late October onwards is one of the better times to visit.

Japan

Broad exposure, sharply peaked.

Japan's typhoon window runs roughly from July to October, with August and September carrying most of the risk. September is generally the single most active month.

Geography splits the country. Okinawa is exposed for the longest period and takes the most direct hits. Kyushu and Shikoku are next. The Kanto region around Tokyo is affected less often, and storms reaching Hokkaido are usually weakening extratropical systems rather than typhoons in full form.

Japan also has the most developed disruption infrastructure in the region. Planned suspensions of rail and air services are announced in advance and executed precisely, which is a mixed blessing: your plans break earlier, but they break predictably.

Korea

The narrowest window of the four, and the one most often overstated.

Korea's typhoon exposure is concentrated in August and September. A typical year sees a small number of storms affect the peninsula, and many of those are weakening systems that have already crossed Japan or the East China Sea.

The southern coast and Jeju are the most exposed. Seoul is affected less often and usually by rain rather than damaging wind.

The bigger weather disruption for a Korean itinerary is often the summer monsoon rather than typhoons, and that peaks earlier, from late June into July.

Where to check this yourself

Do not take any single blog's word for a storm, including this one. These are the agencies that actually issue the warnings, and they are the sources the numbers in this article come from.

Japan Meteorological Agency (JMA) — the official authority for Japanese waters, warnings and landfall.
Korea Meteorological Administration (KMA) — Korean track guidance and warnings.
Joint Typhoon Warning Center (JTWC) — the US centre behind most Category-equivalent figures quoted for western Pacific storms.
Hong Kong Observatory — clear track maps, and useful because it shows several agencies side by side.
China National Meteorological Center — the authority for any Chinese landfall.

If those five disagree with each other, that disagreement is the story. It is the same spread this article is describing, and no blog resolves it faster than the agencies do.

Choosing dates

If you want the short answer by month.

March to May is the safest window across the whole region, and it is also spring, which is the reason most people choose it anyway.

June brings monsoon rain to Korea and Japan before the typhoon peak arrives.

July to September is the peak everywhere. Not a reason to cancel a trip, but a reason to build flexibility into the last two days of it.

October is a genuine improvement for Japan, Korea and Taiwan, while the Philippines remains active.

November onwards is reliable in the north and still risky in the Philippines.

What about Hong Kong, Vietnam and southern China?

Four countries is a useful frame but not the whole basin, and travellers often combine these destinations.

Hong Kong and the Guangdong coast are exposed from roughly May through November, which is longer at both ends than Japan or Korea. Hong Kong's signal system is worth understanding in advance: business and transport shut down at defined thresholds, and the announcements are precise and widely followed.

Vietnam takes storms along its entire coast, and the timing moves through the year. The north, including Ha Long Bay, is most exposed from around June to August. Central Vietnam, including Hue and Hoi An, takes the later storms from September through November, and that stretch of coast also floods heavily.

Southern China from Guangdong to Hainan carries a long season similar to Hong Kong's.

The general rule across the basin is that the further south you go, the earlier the season starts and the later it ends. Northern destinations have a shorter, sharper window.

What this does and does not tell you

This is climatology, not forecasting. It describes what usually happens, which is useful for choosing dates six months out and useless for deciding what to do next week.

Individual years vary enormously. A quiet season can still produce one severe landfall, and an active season can leave a particular country untouched.

So the sensible use is this: pick your dates using the pattern, then, once the trip is close, stop looking at seasonal averages entirely and start watching the actual forecast.

The short version

There is no single typhoon season in this region.

The Philippines has the longest exposure, June to December, and the most landfalls.

Taiwan is concentrated in July to September, and its problem is rain more than wind.

Japan peaks in September, with Okinawa far more exposed than Tokyo.

Korea has the narrowest window, August and September, and is affected less than its neighbours.

And spring is the reliably calm season across all four.

Photo credits

All photographs come from Wikimedia Commons and are used under their respective licences.

Cyclone Catarina from the ISS on March 26 2004.JPG — Astronaut photograph ISS008-E-19646 was taken March 7, 2004, (Public domain), Wikimedia Commons

2 Arecibo Pueblo from Puerto Arecibo-2.jpg — Ligocsicnarf89 (CC BY 4.0), Wikimedia Commons

4 San Juan from Dorado.jpg — Ligocsicnarf89 (CC BY 4.0), Wikimedia Commons

View of coast of Taitung from a ferry 2008.jpg — Dquai (CC BY-SA 4.0), Wikimedia Commons

Western Japan and the Seto Inland Sea (MODIS 2021-03-27).jpg — MODIS Land Rapid Response Team, NASA GSFC (Public domain), Wikimedia Commons

2010 07 15520 5508, Chintsun Taiwan.JPG — Lord Koxinga (CC BY-SA 3.0), Wikimedia Commons

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