Okinawa Weather in September

Season: Autumn

Overview:
1. Okinawa still has a little hot and shining climate in September, requiring sun protective measures.
2. September of Okinawa is also a peak typhoon season, seeing the richest rainfall, and other severe weather phenomena.
3. Late September is a favorable time to visit Okinawa, with fewer tourists, affordable costs and pleasant weather.

Still Hot Temperatures

Okinawa’s weather still remains relatively hot, with average temperature ranging from 26-30°C (79-86°F). On most days, the daily highest temperature easily reaches above 30 degrees Celsius (86 degrees Fahrenheit). But if you encounter a whole rainy day, its daily highest temperature may drop to around 24°C (75°F).

In Early September, the heat lingers throughout the day, while in the second half of the month, mornings and evenings turn a bit cooler, with the lows around 25 degrees Celsius (77 degrees Fahrenheit). If you are sensitive to cool temperatures, it’s wise to pack a thin long-sleeve layer.

Water Exploration

Typhoon Season & Tips

September is the peak typhoon season in Okinawa, bringing heavy rain, strong winds, and rough seas. Your travel plan would be interrupted significantly if you encounter a typhoon: many outdoor scenic spots and water activities would close temporarily; when the wind and rain are quite heavy, it’s even hard to go outside.

Tips: It’s recommended to check the weather forecast in advance to try to avoid encountering typhoons. Plus, for the Okinawa trip in September, book a hotel with hot springs or a wide range of indoor entertainment facilities, to make sure you don’t get bored if the typhoon hits.

Beach Resort in Okinawa

High Humidity

Influenced by heavy rain, Okinawa climate receives a relatively high humidity level, at about 75 %. In the first half of September, there are many continuous hot days, making you feel muggy and sticky. The good news is you would feel much more comfortable in early morning and late afternoon by late September.

Sea Water Temperature

September is still an excellent month for water activities, with warm water temperatures of averaging about 28°C (82°F). Whether you simply want to enjoy swimming in the ocean, or try snorkeling, jet skiing or other water sports, the conditions are ideal.

Banana Boat

Sunshine Hours & Daytime Hours

Sunshine Hours: about 7 hours
Sunrise: 6:09-6:21
Sunset: 18:17-18:49
Daytime Hours: 11 hours 56 minutes - 12 hours 40 minutes

Okinawa in September offers ample sunshine hours and intense UV rays, with the maximum UV index reaching 10, meaning sun protection is essential, especially when you are relaxing on the beach.

Although daytime hours start to shorten, they still remain around 12 hours, allowing for relaxing sightseeing. Sunset viewing is a must-do activity, as Okinawa sunsets are especially enchanting: the sky glows in shades of purple, pink and orange, while the transparent sea reflects those colors, providing a romantic and dream-like scene. It’s best to arrive at viewing spots before 18:00.

Magical Sunset View

Is September a Good Time to Go to Okinawa?

Yes, September is a relatively great time to visit Okinawa.

There is indeed a high chance that Okinawa will suffer typhoons this month, however, aside from that, Okinawa’s weather is just a bit hot with the help of sea winds. Plus, due to warm sea waters, you can fully immerse yourself in various water activities, top things to do during your Okinawa trip. Another advantage is that tourist crowds significantly thin out after the peak travel season of August, meaning lower travel costs and a more relaxing atmosphere. Okinawa’s September is also rich in cultural treasures, with festivals such as the Okinawa All-Island Eisa Festival, offering an opportunity to learn about local heritage.

What to Wear in Okinawa in September?

Top Clothing: It’s totally fine to wear a breathable T-shirt all day long. You are also recommended to pack a light jacket to endure sunshine and possible cool mornings and nights.

Bottom Clothing: Shorts and skirts are recommended. If girls want to snap beautiful photos, try an exquisite dress that goes with the summer beach vibe. But remember to pack light pants to keep comfortable as the weather might turn a bit cool by the end of the month.

Footwear: You can choose sneakers or sandals as long as they are comfortable. Don’t walk barefoot on the beach as the sand might be rough.

Accessories:
Sun protection items: a sun hat, coral-friendly sunscreen, and sunglasses.
Rain gear: an umbrella or a raincoat.
Water activity gadgets: the snorkel and swimming suit.
Mosquito repellent.

Travel Recommendations

1. Pick a day with pleasant weather, and head to a remote island, such as Tokashiki Island. Here, you can enjoy diverse underwater activities or just relax on the tranquil beaches.
2. In the evening, return to the main island and appreciate the stunning sunset view at American Village and Ginowan Beach.
3. If you prefer staying on the main island, spend your day in central Okinawa: admire the dramatic cliffs of Cape Manzamo, watch the scenic Kouri Bridge, and visit Okinawa Churaumi Aquarium for dolphin shows and marine exhibits.
4. For those interested in local traditions, don’t miss the All-Island Eisa Festival in mid-September, 2026. It’s one of Okinawa’s biggest cultural celebrations, featuring powerful drum dances, colorful parades, delicious food, and Orion beer.

Coastal View at Sunset

Travel Tips:

1. Always check the weather forecast frequently. Ferry services to remote islands are often canceled during bad weather, so prepare a Plan B on the main island.
2. Considering the inconvenient transportation and scattered attractions, it’s always a good idea to start your journey early so as to make the most of your day.
3. Mid-September coincides with Japan’s Silver Week public holidays, when domestic travel surges and popular spots can become crowded. If you visit Okinawa during this period, please book flights and hotels early.
4. For a more peaceful experience with comfortable weather and a lower chance of typhoons, it’s best to plan your visit in late September.