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

75.4

°F

June 21, 17:12

Trend:

stable

Yesterday:

75.5°F

Tomorrow:

75.7°F

Sunrise:

05:13

Sunset:

19:31

Day Length:

14 h. 18 min.

Nagasaki in June

Minimum:

59.4°F

Average:

60.9°F

Maximum:

62.6°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 75.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.6°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 rise a bit.

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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 75.1°F on 2023, while the historical minimum was 70.9°F on 2015.

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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 75.8°F, with minimum temperature starting at 75.5°F, while the maximum might reach 76.1°F.

Daily water temperature in Nagasaki

Date Current Year

actual* / forecast**

last year 10 years average
Jun 7 70.0°F 69.9°F 70.9°F
Jun 8 70.1°F 69.6°F 71.1°F
Jun 9 70.3°F 69.9°F 71.5°F
Jun 10 70.4°F 70.1°F 72.0°F
Jun 11 70.5°F 69.9°F 72.1°F
Jun 12 70.7°F 71.7°F 72.2°F
Jun 13 70.8°F 72.4°F 72.4°F
Jun 14 71.0°F 73.4°F 72.7°F
Jun 15 71.7°F 74.9°F 73.1°F
Jun 16 71.7°F 75.2°F 73.1°F
Jun 17 72.8°F 75.9°F 73.5°F
Jun 18 73.0°F 74.2°F 73.3°F
Jun 19 74.0°F 75.7°F 73.8°F
Jun 20 75.5°F 75.4°F 73.8°F
Jun 21 75.4°F 75.0°F 73.8°F
Jun 22 75.7°F 75.4°F 74.0°F
Jun 23 75.5°F 75.2°F 73.9°F
Jun 24 75.8°F 75.0°F 74.2°F
Jun 25 75.7°F 74.9°F 74.1°F
Jun 26 76.1°F 74.9°F 74.5°F
Jun 27 76.0°F 74.8°F 74.4°F
Jun 28 76.1°F 74.8°F 74.5°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.