15-Second Answer
Tsuyu is Japan's rainy season — usually around June to early July in much of mainland Japan. It is not constant heavy rain; it is more like persistent cloud cover with sudden showers. A compact umbrella, quick-dry clothing, and water-resistant shoes cover most situations. It is not as difficult a time to travel as it sounds.
What Is Tsuyu?
Tsuyu (梅雨) is an annual weather pattern that brings extended periods of cloud and rain to much of Japan. It typically arrives in June and eases in early July across mainland Honshu, though timing and intensity vary by year and region. Okinawa enters the rainy season earlier, usually around May. Hokkaido largely escapes it.
The amount of rain and the duration differ significantly from year to year — some years are mild, others bring sustained heavy downpours. Checking a forecast closer to your travel date gives a much more accurate picture than planning around the average.
What's the Weather Actually Like?
Not constant heavy rain. A typical tsuyu day might be overcast with occasional light rain, a brief downpour in the afternoon, and a dry hour in between. Stretches of several dry days are also common within the season.
Temperatures run roughly 20–28°C, but the humidity is high — higher than the thermometer suggests. The combination of warmth and moisture makes it feel more uncomfortable than the number alone implies.
What to Pack
- Compact folding umbrella — essential; rain arrives without much warning and convenience store umbrellas work fine if you forget
- Water-resistant or quick-drying shoes — waterproof trainers or walking shoes that dry fast are the most practical choice for city travel; sandals can work in some situations but leave feet exposed in heavy rain
- Quick-dry clothing — synthetic or linen fabrics dry much faster than cotton; useful for both rain and sweat
- Small towel — for wiping down after getting caught in a shower
Plastic umbrella bags are placed at the entrances of shops and museums across Japan during tsuyu — a small but useful detail that keeps wet umbrellas from dripping inside. Look for them near the door.
Why It's Not as Bad as It Sounds
Tsuyu is off-peak for tourism. Crowds at popular sites are thinner than in spring or autumn, and accommodation prices can be lower than during busier periods — though this varies by destination.
Rain also creates some genuinely good conditions for certain experiences. Hydrangea (ajisai) season peaks during tsuyu, and temple and garden visits in light rain have a quality that clear days do not. If you can build flexibility into your itinerary — outdoor plans on dry days, indoor options when it rains — the season is very manageable.
What Japanese People Actually Do
Keep an umbrella handy and plan around the forecast. Outdoor activities get shifted to better windows in the day; museums, cafes, and covered shopping arcades fill in the rest. The season is an inconvenience, not a reason to stay home — and most people navigate it with a fairly practical attitude.
Bottom Line
Tsuyu is not constant rain — it is persistent cloud and occasional showers. A compact umbrella, quick-dry layers, and water-resistant shoes handle most of it. If you can stay flexible with your plans, the lighter crowds and hydrangea season make it a reasonable time to visit.
