What is the current water temperature in Nagasaki?

Q: What is the current water temperature in Nagasaki?

As of now, in Nagasaki, the water temperature is 14.74°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

Japan > Nagasaki

Water temperature in Nagasaki

Detailed information about the current water temperature in Nagasaki. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

58.5

°F

February 7, 10:21

Trend:

stable

Yesterday:

58.4°F

Tomorrow:

58.4°F

Sunrise:

07:12

Sunset:

17:58

Day Length:

10 h. 46 min.

Nagasaki in February

Minimum:

59.5°F

Average:

61.1°F

Maximum:

62.8°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 58.5°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is about the same as the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature slightly varies from the average of the past two weeks. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 59.9°F on 2022, while the historical minimum was 57.7°F on 2016.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 58.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Nagasaki

Date	Current Year actual* / forecast**	last year	10 years average
Jan 24	59.4°F	58.4°F	59.5°F
Jan 25	58.3°F	59.1°F	59.4°F
Jan 26	57.6°F	59.5°F	59.4°F
Jan 27	57.7°F	59.6°F	59.3°F
Jan 28	58.8°F	59.6°F	59.4°F
Jan 29	58.2°F	59.6°F	59.3°F
Jan 30	58.4°F	59.3°F	59.2°F
Jan 31	59.4°F	57.9°F	59.0°F
Feb 1	58.9°F	58.0°F	59.0°F
Feb 2	58.9°F	57.6°F	58.7°F
Feb 3	58.6°F	57.7°F	58.8°F
Feb 4	58.4°F	57.8°F	58.6°F
Feb 5	58.7°F	57.8°F	58.7°F
Feb 6	58.4°F	57.8°F	58.5°F
Feb 7	58.5°F	58.0°F	58.7°F
Feb 8	58.4°F	58.0°F	58.5°F
Feb 9	58.4°F	57.8°F	58.5°F
Feb 10	58.4°F	57.8°F	58.6°F
Feb 11	58.2°F	56.1°F	58.4°F
Feb 12	58.0°F	56.4°F	58.2°F
Feb 13	58.2°F	56.7°F	58.4°F
Feb 14	58.2°F	55.4°F	58.3°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Nagasaki by month

In Nagasaki, the months July through October offer comfortable swimming conditions, which amounts to 135 swimming days.

The warmest water in Nagasaki was recorded on August 5, 2024, reaching a 88.0°F. While the coldest temperature occurred on February 27, 2025, dipping to 54.7°F. The average readings by season are 60.8°F in Winter, 62.5°F in Spring, 78.8°F in Summer, and 75.6°F in Autumn.