Okinawa’s Climate
One of the defining features of Okinawa’s climate is its warm weather throughout the year. Days with extreme heat above 35°C (95°F) or cold temperatures below 10°C (50°F) are relatively uncommon compared to many other parts of Japan.
Because annual temperature fluctuations are smaller than on the Japanese mainland, Okinawa remains a popular resort destination in every season. Whether you’re visiting in spring, summer, autumn, or winter, you’ll generally enjoy a mild and pleasant climate.
That said, choosing the right time to visit can make your trip even more comfortable and enjoyable.
In this guide, we’ll take a closer look at Okinawa’s temperatures and humidity levels throughout the year. We’ll also share recommendations on what to wear and what to pack for different weather conditions, helping you prepare for the perfect Okinawa vacation.
Be sure to read on to find the best season for your trip!
Average Annual Temperature in Okinawa
Surrounded by warm ocean waters, Okinawa has a subtropical maritime climate, which is characterized by warm temperatures and relatively high humidity throughout the year.
The average annual temperature is around 23°C (74°F), making Okinawa significantly warmer than most parts of mainland Japan. Its combination of warmth and humidity contributes to the island’s lush natural environment and year-round appeal as a travel destination.
The hottest months are typically July and August, while January is generally the coolest month of the year.
Even during the coldest part of January, however, temperatures in Okinawa are often nearly 10°C (18°F) higher than those in many areas of mainland Japan. As a result, Okinawa rarely experiences the kind of severe winter weather found elsewhere in the country.
Average Annual Temperatures: Naha vs. Other Major Cities in Japan
Next, let’s compare the average annual temperatures of Naha, Okinawa’s capital, with those of other major Japanese cities such as Tokyo and Sapporo.
▼Average Annual Temperatures in Naha and Other Cities
| Average Annual Temperature | Average Temperature (July–August) | Average Temperature (January–February) | |
|---|---|---|---|
| Naha | 23℃ | 29.4℃ | 17.5℃ |
| Tokyo | 16℃ | 27.6℃ | 5.7℃ |
| Sapporo | 9℃ | 22.7℃ | -3.2℃ |
Source: Japan Meteorological Agency (JMA) – Climate Normals
Surrounded by the ocean, Okinawa is known for its consistently high humidity throughout the year.
Even during the relatively “dry” winter season, average humidity levels remain around 70%, while during the rainy season they can exceed 80%.
For comparison, the average humidity during the rainy season in mainland Japan is typically around 70–75%, highlighting just how humid Okinawa can be.
Average Annual Humidity: Naha vs. Other Cities
Below is a comparison of average annual humidity in Naha, Tokyo, and Sapporo.
▼Average Annual Humidity: Naha vs. Other Cities
| Average Annual Humidity | |
|---|---|
| Naha | 74～76% |
| Tokyo | 68～70% |
| Sapporo | 64～66% |
Source: Japan Meteorological Agency (JMA), MLIT, Japan – Climate Normals
Recommended Clothing and Items by Temperature
In Okinawa, cool sea breezes blow during the summer, while cold winds blow in the winter.
Because of these winds, you may sometimes feel a difference between the actual temperature and the perceived (feels-like) temperature.
Next, we’ll introduce recommended outfits based on temperature. We hope this helps you plan your trip!
【Summer (June–September) Clothing & Items] Average temperature: 27°C–29°C】
Sleeveless tops or short sleeves are fine.
However, it’s a good idea to bring a light outer layer.
During the day, temperatures often exceed 30°C, with strong UV rays throughout.
Don’t forget sun protection such as hats, sunglasses, and sunscreen.
Indoors, air conditioning is often set quite high and may feel cold, so bringing a light layer for cooling indoors is also recommended.
【Autumn (October–November) Clothing & Items] Average temperature: 22°C–25°C】
【Winter (December–February) Clothing & Items] Average temperature: 17°C–18°C】
Long-sleeve innerwear or a light hoodie is a good choice.
A windproof outer layer is recommended.
Shoes are better than sandals.
December to February is the coldest season in Okinawa.
In early December, temperatures are still relatively mild at around 17°C, but from late December through February, there are days when it drops to around 10°C.
When the cold Okinawan winds blow, the perceived temperature can feel below 10°C, so be sure to bring windproof outerwear.
【Spring (March–May) Clothing & Items] Average temperature: 19°C–24°C】
Short sleeves are fine during the daytime!
It’s a good idea to bring a cardigan or hoodie for layering.
After Golden Week, don’t forget a foldable umbrella.
Spring in Okinawa sees many days where temperatures exceed 20°C, making short sleeves comfortable during the day.
However, just like in autumn, mornings and evenings can feel cooler, so it’s best to have an extra layer you can throw on.
Although many people associate Okinawa with “beach season” starting in March, there are still days when a short-sleeve outfit alone feels a bit chilly.
Also, after Golden Week, the rainy season begins, bringing more rain and sudden showers, so a foldable umbrella is essential.
Okinawa’s rainy season humidity can exceed 80%, so it may feel quite humid and muggy—light, breathable clothing is recommended for a more comfortable stay.
Enjoy Okinawa to the fullest with GO!GO!TOUR Rent a Car!
Once you understand Okinawa’s climate, the next step is planning your stay.
If you want to fully explore the island, a rental car that lets you travel freely is highly recommended.
If you haven’t arranged one yet, start by checking vehicle availability on “GO!GO!TOUR Rent a Car.”
With “GO!GO!TOUR” you can easily find the best available deals for your preferred dates and times.
Okinawa has many comfortable days throughout the year, but each season comes with its own considerations—UV protection and air-conditioning in summer, wind protection in winter, and sudden showers and humidity during the rainy season.
To ensure a comfortable trip, please choose your clothing and items according to the temperature and humidity.
We hope you create wonderful memories in Okinawa.
