Live Weather & Forecast
Weather in Isahaya
Nagasaki, Japan · Real-time conditions & 3-day outlook
18°C
Feels like 18°C
65°F / Feels 65°F
Partly cloudy
Isahaya, Nagasaki
🌙 Nighttime
Updated: 2026-04-15 19:00
Humidity
83%
Wind
12.6 km/h NNE
Wind Gust
17.4 km/h
Pressure
1009 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
14.3°C
Wind Degree
29°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
258.9 μg/m³
NO₂
16 μg/m³
O₃
52 μg/m³
SO₂
7.2 μg/m³
PM 2.5
19.9 μg/m³
PM 10
20.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Isahaya, Nagasaki
12 AM
16°
Fog
1 AM
16°
Fog
2 AM
16°
Fog
3 AM
16°
Fog
4 AM
16°
Fog
5 AM
16°
Fog
6 AM
16°
Fog
7 AM
17°
Fog
8 AM
17°
Mist
9 AM
17°
Mist
10 AM
17°
Mist
11 AM
18°
Patchy rain nearby
12 PM
19°
Patchy rain nearby
1 PM
19°
Patchy rain nearby
2 PM
19°
Patchy rain nearby
3 PM
19°
Patchy rain nearby
4 PM
18°
Patchy rain nearby
5 PM
18°
Patchy rain nearby
6 PM
17°
Patchy rain nearby
7 PM
18°
Partly cloudy
8 PM
16°
Partly Cloudy
9 PM
15°
Partly Cloudy
10 PM
14°
Partly Cloudy
11 PM
14°
Clear
3-Day Forecast
Daily overview for Isahaya, Nagasaki
Today
Patchy rain nearby
19°
/
14°
🌧️ 89% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 13.3 km/h
🌧️ Total precip: 0.61 mm
☀️ UV Index: 1.1
🌅 Sunrise: 05:51 AM
🌇 Sunset: 06:50 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Sunny
23°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 68%
💨 Max wind: 23 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.2
🌅 Sunrise: 05:50 AM
🌇 Sunset: 06:50 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Patchy rain nearby
18°
/
14°
🌧️ 81% chance of rain
💧 Avg. humidity: 73%
💨 Max wind: 22.3 km/h
🌧️ Total precip: 0.62 mm
☀️ UV Index: 1.3
🌅 Sunrise: 05:48 AM
🌇 Sunset: 06:51 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Isahaya
Plan your trip to Isahaya, 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 Isahaya?
Current conditions in Isahaya: Partly cloudy, temperature 18°C, humidity 83%.
What is the best time to visit Isahaya?
The best time to visit Isahaya is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Isahaya?
Isahaya is located at approximately 32.8° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Isahaya?
The wettest period in Isahaya is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Isahaya?
For visits to Isahaya during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Isahaya in 2026?
View the 2026 public holidays for Isahaya on our Holidays page.
What are the GPS coordinates used for the weather forecast in Isahaya?
The weather forecast for Isahaya uses coordinates 32.8434, 130.0531.