Live Weather & Forecast
Weather in Karatsu
Saga, Japan · Real-time conditions & 3-day outlook
17°C
Feels like 17°C
63°F / Feels 63°F
Overcast
Karatsu, Saga
🌞 Daytime
Updated: 2026-04-15 15:00
Humidity
77%
Wind
18.4 km/h NNE
Wind Gust
23.5 km/h
Pressure
1010 mb
Visibility
10 km
UV Index
1.3
(Low)
Precipitation
0.03 mm
Cloud Cover
100%
Dew Point
13.8°C
Wind Degree
11°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (3)
CO
436.9 μg/m³
NO₂
24.7 μg/m³
O₃
52 μg/m³
SO₂
9.1 μg/m³
PM 2.5
25.2 μg/m³
PM 10
27.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for Karatsu, Saga
12 AM
16°
Light rain
1 AM
16°
Light rain shower
2 AM
16°
Light rain shower
3 AM
16°
Light rain shower
4 AM
16°
Light drizzle
5 AM
16°
Light drizzle
6 AM
16°
Light rain shower
7 AM
15°
Light rain shower
8 AM
15°
Light rain shower
9 AM
15°
Light rain shower
10 AM
15°
Patchy rain nearby
11 AM
15°
Patchy rain nearby
12 PM
15°
Patchy rain nearby
1 PM
15°
Patchy rain nearby
2 PM
15°
Patchy rain nearby
3 PM
17°
Overcast
4 PM
15°
Patchy rain nearby
5 PM
15°
Patchy rain nearby
6 PM
15°
Partly Cloudy
7 PM
14°
Partly Cloudy
8 PM
14°
Partly Cloudy
9 PM
14°
Cloudy
10 PM
14°
Cloudy
11 PM
14°
Partly Cloudy
3-Day Forecast
Daily overview for Karatsu, Saga
Today
Moderate rain
16°
/
14°
🌧️ 89% chance of rain
💧 Avg. humidity: 95%
💨 Max wind: 21.6 km/h
🌧️ Total precip: 5.42 mm
☀️ UV Index: 0.5
🌅 Sunrise: 05:51 AM
🌇 Sunset: 06:51 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Patchy rain nearby
17°
/
12°
🌧️ 89% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 0.35 mm
☀️ UV Index: 2.1
🌅 Sunrise: 05:49 AM
🌇 Sunset: 06:51 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Partly Cloudy
18°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 12.6 km/h
🌧️ Total precip: 0.03 mm
☀️ UV Index: 1.2
🌅 Sunrise: 05:48 AM
🌇 Sunset: 06:52 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Karatsu
Plan your trip to Karatsu, Japan around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Karatsu?
Current conditions in Karatsu: Overcast, temperature 17°C, humidity 77%.
What is the best time to visit Karatsu?
The best time to visit Karatsu is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Karatsu?
Karatsu is located at approximately 33.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Karatsu?
The wettest period in Karatsu is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Karatsu?
For visits to Karatsu during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Karatsu in 2026?
View the 2026 public holidays for Karatsu on our Holidays page.
What are the GPS coordinates used for the weather forecast in Karatsu?
The weather forecast for Karatsu uses coordinates 33.4503, 129.9679.