Month-by-month travel weather

Okinawa (Naha) September weather

Okinawa (Naha), Japan · September

Still hot enough for swimming, but with slightly calmer mood

September in Okinawa still feels like summer, with warm sea temperatures and many beach-worthy days, but the overall mood becomes a little quieter.

Daytime highs around 28-30°C and lows of 24-26°C remain warm, while rainfall and typhoon influences are still significant.

Average low

around 24-26°C

Average high

around 28-30°C

Average rainfall

around 150-200 mm

Rainy days

around 10-12 days

Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.

• Summer outfits—T-shirts, tanks, shorts, dresses—are still the main wardrobe.
• Because of insects and sun, having a thin long-sleeve layer for evenings can be helpful.
• Rain-friendly sandals and a light raincoat or umbrella are smart additions.

• Sea and sky are still beautiful, but unstable weather from typhoons can continue, so keep an eye on forecasts.
• If you prioritize both sea time and some relaxation, September offers a good balance of warm water and slightly fewer crowds.
• Use evenings, when temperatures are milder, for open-air dining and strolls, and keep midday for rest and shade.

Q. Is it still very hot in September?

A. Yes, it still feels like summer, but nights tend to be a bit less oppressive than in peak August.

Q. Is September safer from typhoons than August?

A. Typhoons remain possible and sometimes quite strong. Treat September as still part of the typhoon-prone period.

Q. Is the sea still good for swimming?

A. Absolutely—the sea is still warm and pleasant, often with fewer crowds than in July-August.

Authored by Jiheon Bang

Updated: 2025-12-01

Reviewed using Visual Crossing Weather data and reorganized from a traveler’s perspective.

Weather data is designed to be refreshed roughly every 10 minutes.