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

71.2

°F

June 4, 21:28

Trend:

decreasing

Yesterday:

72.2°F

Tomorrow:

71.1°F

Sunrise:

05:13

Sunset:

19:25

Day Length:

14 h. 12 min.

Nagasaki in June

Minimum:

59.4°F

Average:

61.0°F

Maximum:

62.6°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 71.2°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.4°F higher 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling 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 72.8°F on 2022, while the historical minimum was 69.7°F on 2024.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest 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 71.7°F, with minimum temperature starting at 71.1°F, while the maximum might reach 72.5°F.

Daily water temperature in Nagasaki

Date Current Year

actual* / forecast**

last year 10 years average
May 21 69.1°F 66.8°F 67.8°F
May 22 71.2°F 67.8°F 68.3°F
May 23 70.2°F 69.1°F 68.8°F
May 24 71.4°F 69.1°F 68.8°F
May 25 71.6°F 67.7°F 69.2°F
May 26 73.6°F 67.7°F 69.6°F
May 27 73.1°F 67.2°F 69.6°F
May 28 73.1°F 69.1°F 69.9°F
May 29 72.6°F 69.0°F 69.8°F
May 30 73.1°F 68.9°F 69.8°F
May 31 72.4°F 68.4°F 70.0°F
Jun 1 73.6°F 68.3°F 70.3°F
Jun 2 73.6°F 70.9°F 70.4°F
Jun 3 72.2°F 70.4°F 70.6°F
Jun 4 71.2°F 70.1°F 70.8°F
Jun 5 71.1°F 68.8°F 70.7°F
Jun 6 71.2°F 69.8°F 70.8°F
Jun 7 71.4°F 70.0°F 71.0°F
Jun 8 71.6°F 70.1°F 71.2°F
Jun 9 72.0°F 70.3°F 71.6°F
Jun 10 72.4°F 70.4°F 72.0°F
Jun 11 72.5°F 70.5°F 72.1°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, 62.7°F in Spring, 78.8°F in Summer, and 75.6°F in Autumn.