SeasonScore
Okinawa, Japan
Photo: 663highland · CC BY 2.5

Japan

Okinawa in September

🌧️ Rainy season

Warm, humid and often rainy. Watch for tropical cyclone risk.

🎒 Pack: compact umbrella or rain jacket · quick-dry fabrics

Best months: Mar (9.2), Nov (9.1), Feb (9.0)

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Why September scores 7.9What goes into the score

How it works
🌡️ 29° / 28°C🌧️ 173 mm💧 dew pt 25°🍃 PM2.5 5
  • Weather comfort6.6
    • ✓Warm (29.2°C highs / 28.1°C lows)
    • !Very humid/sticky (dew point 25.1°C)
    • !Wet: ~173 mm rain, ~4 heavy-rain days
  • Air quality10.0
    • ✓Good (within WHO guideline) (PM2.5 ~5 µg/m³)
  • Seasonal hazards8.5
    • !Tropical cyclone: Peak of the Western Pacific typhoon season
  • Safety baseline9.0
    • ·Normal precautions
Compare monthsPut September side by side with another month
SepMar
Score7.9 Very good9.2 Excellent
Season🌧️ Rainy season☀️ Dry season
High / low29° / 28°21° / 19°
Rain173 mm72 mm
Humiditydew pt 25°dew pt 16°
PM2.55 µg/m³10 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).

Holidays & crowdsSeptember 2027

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Silver Week 18–20 Sep · 3 days off in a row

Other public holidays: Autumnal Equinox Day (23 Sep)

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Nature calendarBlossoms, leaves & seasons in Okinawa

  • Cherry blossom 2026 (what actually happened)2026 actual
    First blooms 18 Jan 2026, full bloom 3 Feb 2026

    Observed by JMA at the city's official sample tree. The 2027 forecast isn't out yet: Japanese weather companies such as the Japan Weather Association usually publish the first one in January, and we add it then.

    Source: Japan Meteorological Agency

  • Cherry blossom (hikan-zakura)Typical dates
    First blooms ~16 Jan, full bloom ~4 Feb

    Typical dates (1991–2020 normal). In 2021–2026 first blooms came between 4 Jan and 18 Jan (18 Jan in 2026). Blossoms last about a week after full bloom. Okinawa's deep-pink Taiwan cherry flowers in winter.

    Source: Japan Meteorological Agency

Explore OkinawaEvents, sights, food & souvenirs

Check event dates locally

Japan's southernmost prefecture, a chain of subtropical islands with coral reefs, beaches, a distinct Ryukyu culture and important Second World War sites.

Events in September
Okinawa Zento Eisa FestivalDate variesUsually late August or September, after Obon

A large festival of Eisa drum dancing.

Why go: One of the best places to see Eisa performed.

Where: Okinawa City

Coming up later

Naha Great Tug-of-WarDate variesUsually a Sunday in October

A tug-of-war with a giant rice-straw rope in which spectators can join.

Why go: Roads in central Naha close for the event.

Where: Kumoji, Naha

Cherry blossom seasonDate variesUsually late January to mid-February

Japan's earliest cherry blossoms, with deep pink Kanhizakura trees.

Why go: Blossoms come weeks before mainland Japan.

Where: Nago Castle Park and Yaedake

Humpback whale seasonDate variesUsually January to March

Humpback whales come to Okinawan waters to breed.

Why go: Whale-watching tours run from Naha.

Where: Kerama Islands and waters off Naha