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

61.3

°F

January 8, 00:15

Trend:

stable

Yesterday:

61.5°F

Tomorrow:

61.4°F

Sunrise:

07:24

Sunset:

17:31

Day Length:

10 h. 7 min.

Nagasaki in January

Minimum:

59.3°F

Average:

61.3°F

Maximum:

63.0°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 61.3°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 0.7°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 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 62.3°F on 2020, while the historical minimum was 58.9°F on 2023.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 61.1°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 1 62.6°F 60.0°F 61.3°F
Jan 2 61.9°F 59.5°F 61.1°F
Jan 3 62.6°F 60.0°F 61.2°F
Jan 4 62.3°F 60.8°F 61.1°F
Jan 5 62.0°F 60.7°F 61.1°F
Jan 6 61.5°F 61.0°F 61.0°F
Jan 7 61.5°F 60.2°F 60.8°F
Jan 8 61.3°F 60.4°F 60.6°F
Jan 9 61.4°F 60.5°F 60.8°F
Jan 10 61.3°F 60.3°F 60.6°F
Jan 11 61.3°F 60.0°F 60.6°F
Jan 12 61.2°F 60.0°F 60.5°F
Jan 13 60.9°F 59.6°F 60.3°F
Jan 14 60.8°F 58.5°F 60.1°F
Jan 15 60.7°F 58.7°F 60.1°F
Dec 25 63.2°F 61.1°F 62.5°F
Dec 26 63.4°F 60.9°F 62.3°F
Dec 27 62.9°F 60.6°F 62.0°F
Dec 28 63.0°F 60.6°F 61.6°F
Dec 29 62.3°F 60.6°F 61.5°F
Dec 30 62.9°F 60.7°F 61.5°F
Dec 31 63.2°F 60.5°F 61.4°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.