Ehime Prefecture occupies the northwestern corner of Shikoku island, facing the Seto Inland Sea. Known for Matsuyama Castle, the oldest operating hot-spring bathhouse at Dogo Onsen, the pilgrimage temples of the Shikoku 88-temple circuit, and the nation's finest mandarin oranges, Ehime blends samurai history with coastal scenery and one of Japan's most genuine onsen cultures.
Ehime has a warm temperate maritime climate influenced by the Seto Inland Sea. Matsuyama is among the sunniest cities in Japan, receiving approximately 2,100 hours of sunshine per year. Summers are hot and humid (July–August, 32–36°C / 90–97°F), while winters are mild on the coast (5–12°C / 41–54°F) but snowy at mountain elevations. The Seto Inland Sea moderates rainfall — the Imabari area averages only 1,000 mm/year, one of Japan's driest coastal zones. Higher elevations like Ishizuchi receive heavy snow November–March.
Best time to visit
Best: Year-round
Avoid: None
Month-by-month weather
Typical conditions throughout the year.
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The seasons
What to expect in each part of the year.
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Spring, Summer, Autumn, Winter
Crowds & peak times
When to expect tourists and when to avoid them.
- Items
- Season
- Cherry blossom (late March–early April)
- Level
- Very High
- Notes
- Matsuyama Castle queues; book accommodation 2–3 months ahead
- Season
- Golden Week (late April–early May)
- Level
- High
- Notes
- Domestic holiday crowds; ferries and buses fill up; pre-book transport
- Season
- Summer (July–August)
- Level
- Moderate–High
- Notes
- Beaches and islands busy; mountain trails less crowded in July heat
- Season
- Autumn foliage (late October–November)
- Level
- Moderate
- Notes
- Second peak; more manageable than cherry blossom season
- Season
- Winter (December–February)
- Level
- Low
- Notes
- Quietest period; Dogo Onsen and Matsuyama castle open normally; discounted rates at many hotels
Major events & festivals
Time your visit around what matters.