All data are in degrees Fahrenheit

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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.
Sea temperature in Nagasaki now

61.5

°F

April 19, 11:28

Trend:

stable

Yesterday:

61.5°F

Tomorrow:

61.5°F

Sunrise:

05:47

Sunset:

18:53

Day Length:

13 h. 6 min.

Nagasaki in April

Minimum:

59.2°F

Average:

60.9°F

Maximum:

62.8°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 61.5°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 0.9°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. 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 64.2°F on 2024, while the historical minimum was 60.4°F on 2015.

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 62.0°F, with minimum temperature starting at 61.5°F, while the maximum might reach 62.6°F.

Daily water temperature in Nagasaki

Date Current Year

actual* / forecast**

last year 10 years average
Apr 5 56.4°F 61.2°F 60.6°F
Apr 6 57.0°F 62.0°F 60.8°F
Apr 7 57.2°F 62.1°F 60.7°F
Apr 8 58.3°F 62.1°F 60.7°F
Apr 9 59.5°F 62.3°F 61.1°F
Apr 10 59.8°F 62.4°F 61.3°F
Apr 11 59.7°F 61.6°F 61.3°F
Apr 12 60.9°F 61.6°F 61.3°F
Apr 13 61.0°F 61.6°F 61.6°F
Apr 14 60.2°F 62.3°F 61.7°F
Apr 15 60.0°F 62.4°F 61.9°F
Apr 16 59.6°F 63.1°F 61.9°F
Apr 17 60.3°F 62.1°F 62.0°F
Apr 18 61.5°F 63.7°F 62.3°F
Apr 19 61.5°F 64.2°F 62.3°F
Apr 20 61.5°F 64.1°F 62.3°F
Apr 21 61.6°F 63.8°F 62.5°F
Apr 22 61.9°F 63.7°F 62.8°F
Apr 23 62.0°F 63.6°F 62.9°F
Apr 24 62.0°F 63.6°F 62.9°F
Apr 25 62.4°F 64.7°F 63.3°F
Apr 26 62.6°F 64.9°F 63.5°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 131 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 60.7°F in Winter, 62.5°F in Spring, 78.3°F in Summer, and 75.1°F in Autumn.