Best time to cruise · Good time to go
Japan cruises in September
The peak month for typhoons, which can cancel or swap calls in Okinawa, Kyushu and even Tokyo, so flexibility helps. Heat lingers early, then eases. In the high mountains of Hokkaido’s Daisetsuzan, the first autumn color appears late in the month, and crowds are lighter than in spring.
- Good time to go
- Avg high 81°F
- 12 hrs daylight
Photo: Alpsdake, CC BY-SA 4.0, via Wikimedia Commons
Japan in September: Good time to go
The peak month for typhoons, which can cancel or swap calls in Okinawa, Kyushu and even Tokyo, so flexibility helps. Heat lingers early, then eases. In the high mountains of Hokkaido’s Daisetsuzan, the first autumn color appears late in the month, and crowds are lighter than in spring.
Across Japan cruise ports, September brings average highs around 81°F (27°C) and lows near 71°F, with about 8.6 inches of rain over the month and roughly 12 hours of daylight.
- Verdict
- Good time to go
- Season
- Late March to May and September to November are peak; limited sailings in summer and winter
- Average high / low
- 81°F / 71°F
- Rainfall (month)
- 8.6 in
- Daylight
- About 12 hours
- Typical cruise length
- 7 to 14 nights, usually round trip from Tokyo (Yokohama), Kobe or Osaka
What to pack: light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms. It's one of the wetter months, so bring a compact umbrella or rain jacket.
How September compares with the rest of the year
- Jan: Shoulder season
- Feb: Shoulder season
- Mar: Best time to go
- Apr: Best time to go
- May: Best time to go
- Jun: Shoulder season
- Jul: Good time to go
- Aug: Good time to go
- Sep: Good time to go
- Oct: Best time to go
- Nov: Best time to go
- Dec: Shoulder season
- No regular sailings
- Shoulder season
- Good time to go
- Best time to go
Japan weather in September
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F (°C) | 499 | 5010 | 5714 | 6518 | 7323 | 7825 | 8429 | 8630 | 8127 | 7222 | 6317 | 5312 |
| Low °F (°C) | 394 | 394 | 457 | 5211 | 6015 | 6719 | 7424 | 7725 | 7122 | 6116 | 5211 | 436 |
| Rain in (mm) | 3.486 | 3.280 | 4.7119 | 5.6143 | 6.6167 | 10.3261 | 9.9252 | 9.0228 | 8.6219 | 5.8147 | 4.2106 | 3.793 |
| Daylight (hrs) | 10 | 11 | 12 | 13 | 14 | 15 | 14 | 14 | 12 | 11 | 10 | 10 |
September weather port by port
| Port | Avg high | Avg low | Rain | Daylight |
|---|---|---|---|---|
| Tokyo (Yokohama) | 83°F | 70°F | 9.8 in | 12 h |
| Kobe | 82°F | 73°F | 8.0 in | 12 h |
| Osaka | 84°F | 70°F | 10.1 in | 12 h |
| Hiroshima | 83°F | 69°F | 8.3 in | 12 h |
| Nagasaki | 83°F | 75°F | 9.9 in | 12 h |
| Shimizu (for Mount Fuji) | 82°F | 74°F | 10.6 in | 12 h |
| Kagoshima | 84°F | 76°F | 14.9 in | 12 h |
| Hakodate | 73°F | 63°F | 5.0 in | 12 h |
| Otaru | 73°F | 58°F | 5.0 in | 12 h |
| Kanazawa | 83°F | 70°F | 9.2 in | 12 h |
| Aomori | 75°F | 64°F | 5.2 in | 12 h |
| Naha, Okinawa | 85°F | 83°F | 6.8 in | 12 h |
| Fukuoka (Hakata) | 84°F | 70°F | 9.3 in | 12 h |
| Busan | 77°F | 75°F | 9.3 in | 12 h |
Average daily highs and lows, 2015–2024, from NASA POWER, adjusted to sea level. Rain is the average monthly total.
Other great cruise destinations in September
- Hawaii in September
- Canada & New England in September
- Pacific Coastal in September
- Mediterranean in September
- Western Mediterranean in September
- Eastern Mediterranean & Adriatic in September
- Greek Isles in September
- Western Europe in September
- Tahiti & the South Pacific in September
- Danube River in September
See every destination for September, with a port weather map →
Japan in September: FAQs
Is September a good time to cruise Japan?
Yes, it's a good month. The peak month for typhoons, which can cancel or swap calls in Okinawa, Kyushu and even Tokyo, so flexibility helps. Heat lingers early, then eases. In the high mountains of Hokkaido’s Daisetsuzan, the first autumn color appears late in the month, and crowds are lighter than in spring.
What is the weather like on a Japan cruise in September?
Across Japan cruise ports, September brings average highs around 81°F (27°C) and lows near 71°F, with about 8.6 inches of rain over the month and roughly 12 hours of daylight. Conditions vary from port to port and day to day.
What should I pack for a Japan cruise in September?
Pack light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms. It's one of the wetter months, so bring a compact umbrella or rain jacket. Check your cruise line's dress code for evenings.
When is the best time to cruise Japan?
Late March to May and September to November are peak; limited sailings in summer and winter. The best months are usually March, April, May, October, November.
Where else can I cruise in September?
September is also a top month for Hawaii, Canada & New England, Pacific Coastal, Mediterranean, Western Mediterranean.
Updated November 2026 by the BookMyDreamCruise editorial team. How we research and fact-check.
Sources: NASA POWER climate data.