HOME 7-Day Japan Weather Forecast: Tokyo, Osaka, Sapporo, Sendai, Fukuoka, Naha – Plan & Pack Smart for Your Trip
7-Day Japan Weather Forecast: Tokyo, Osaka, Sapporo, Sendai, Fukuoka, Naha – Plan & Pack Smart for Your Trip

7-Day Japan Weather Forecast: Tokyo, Osaka, Sapporo, Sendai, Fukuoka, Naha – Plan & Pack Smart for Your Trip

Last updated: 18 August 2025

Getting ready for a trip to Japan? Whether you're exploring the buzzing metropolis of Tokyo, the streets of Osaka, or enjoying the beaches of Naha, checking the weather ahead of time is key to a smooth journey. This 7-day forecast covers six major cities (Tokyo, Osaka, Sapporo, Sendai, Fukuoka, and Naha), helping you pack wisely and plan each day with confidence, no matter the season.

(Forecast data is as of August 18, 2025 at 8 AM JST)

Table of Contents
  1. Japan Weather Overview
  2. What to Do in August
  3. City-Specific 7-Day Forecasts (August 18–24, 2025)
  4. Seasonal Tips & Current Vibe
  5. Plan Your Trip With LIVE JAPAN!

Japan Weather Overview

Japan 7-Day Forecast (August 18–25, 2025)

Expect mostly clear to cloudy skies across the country, with occasional showers in the north and midweek rainfall possible in central and southern areas. Temperatures stay warm in the north and remain hot and humid across central and southern Japan — summer isn’t over yet!

Typhoon Information

Typhoon Information

According to the latest forecasts, there are no typhoons expected to affect mainland Japan this week.

Japan's typhoon season runs from May through October, with most activity from July to September. During a typhoon, transit delays and cancellations can be expected. Be sure to stay updated on the latest weather and flight information. For real-time updates on railways and airports, visit LIVE JAPAN's transport information page.

What to do in Japan when it's raining? Check these articles out for ideas!

What to Do in August

August is considered the height of Japan’s summer festival season, when the country bursts into color and sound. Nearly every region holds its own celebration, ranging from small neighborhood Bon-odori dances to massive, city-wide spectacles, like the Aomori Nebuta Matsuri.

In Tokyo, you might catch the Asakusa Samba Carnival, a fun parade blending Japanese flair with Brazilian rhythms. In eastern Japan, the Nagaoka Fireworks Festival in Niigata Prefecture is one of the largest in the country, lighting up the night sky with thousands of spectacular bursts. Kyoto hosts the Daimonji Gozan Okuribi on August 16, where giant bonfires shaped like Chinese characters are lit on surrounding mountains to send ancestral spirits back to the afterlife.

At many of the summer festivals, expect to see elaborately decorated floats, yukata-clad dancers moving in unison to folk songs, and food stalls offering a variety of summer street foods.

Especially for first-time visitors, viewing (and even joining) a local festival isn’t just a fun activity; it’s a great chance to connect with Japan on a different level and make a lasting memory.

Tours & Activities to Try This Month

City-Specific 7-Day Forecasts (August 18–24, 2025)

Tokyo

Tokyo

Tokyo will stay hot and mostly sunny, with highs around 34–36°C (93–97°F) and lows around 25–27°C (77–81°F). Clouds may roll in midweek, bringing a slight chance of rain, but overall, the weather should be favorable for sightseeing.

Sapporo

Expect mild temperatures (low to mid-20s°C / 68–77°F), with cloudy skies and frequent rain showers, especially early in the week. Some sunshine is likely toward the weekend.

Sendai

A warm and relatively stable week in Sendai, with daytime highs in the low to mid-30s°C (86–91°F). Skies will be partly cloudy with occasional sun, and only a slight chance of rain.

Osaka

Expect a hot and humid week in Osaka, with highs around 36–37°C (97–99°F) and lows around 27–28°C (81–82°F). The forecast calls for mostly dry, partly cloudy skies with just a chance of showers early on.

Fukuoka

Fukuoka will see mostly clear skies with occasional clouds. Temperatures will stay consistently warm, making it a good week for outdoor activities. Rain chances remain low.

Naha

Early in the week may bring rain, but conditions should become drier and more stable by the weekend. Temperatures will stay steady in the low to mid-30s°C (86–91°F), with high humidity.

Seasonal Tips & Current Vibe

Travel Tips for Visiting Japan This Month
  • Stay well-hydrated by drinking plenty of water and electrolyte drinks like Pocari Sweat.
  • Wear lightweight, loose-fitting, and breathable clothing, and carry a spare t-shirt.
  • Carry sun protection essentials, including a wide-brimmed hat, sunscreen, and sunglasses.
  • Consider taking midday breaks at your hotel for a cool-off and rest, and consider enjoying air-conditioned indoor attractions during the hottest parts of the day.
Japan weather-related resources (Japan Meteorological Agency)

The forecast was AI-generated and then human-edited. Source for forecast and images: Japan Meteorological Agency website (www.jma.go.jp)

Plan Your Trip With LIVE JAPAN!

Whether you're planning to be in Japan this week or later this year, check out these fun things you can add to your itinerary!

Written by:
LIVE JAPAN Editor
LIVE JAPAN Editor

The LIVE JAPAN editorial team is a multinational group made up of native editors who have lived in Japan for over five years and Japanese editors who love to travel. Together, we share the best of Japan, offering cultural insights, historical context, event updates, and travel-friendly deals, to support your journey every step of the way.

*This information is from the time of this article's publication.
*Prices and options mentioned are subject to change.
*Unless stated otherwise, all prices include tax.

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