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

82.9

°F

August 15, 01:14

Trend:

stable

Yesterday:

82.6°F

Tomorrow:

82.8°F

Sunrise:

05:43

Sunset:

19:06

Day Length:

13 h. 23 min.

Nagasaki in August

Minimum:

58.9°F

Average:

60.7°F

Maximum:

62.3°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 82.9°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 0.9°F lower than 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 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 85.8°F on 2016, while the historical minimum was 81.9°F on 2021.

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 82.7°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
Aug 1 84.0°F 84.0°F 83.1°F
Aug 2 84.8°F 84.0°F 83.3°F
Aug 3 85.4°F 85.4°F 83.7°F
Aug 4 86.3°F 84.6°F 84.0°F
Aug 5 85.6°F 84.0°F 84.3°F
Aug 6 85.6°F 85.1°F 84.5°F
Aug 7 85.4°F 84.8°F 84.3°F
Aug 8 85.4°F 84.5°F 84.4°F
Aug 9 85.1°F 84.3°F 84.2°F
Aug 10 84.6°F 83.5°F 83.4°F
Aug 11 83.5°F 83.0°F 83.0°F
Aug 12 83.1°F 83.2°F 83.2°F
Aug 13 82.3°F 83.0°F 83.4°F
Aug 14 82.6°F 83.7°F 83.6°F
Aug 15 82.9°F 83.5°F 83.9°F
Aug 16 82.8°F 84.5°F 83.7°F
Aug 17 82.9°F 86.2°F 83.9°F
Aug 18 82.7°F 85.7°F 83.6°F
Aug 19 82.6°F 85.4°F 83.6°F
Aug 20 82.6°F 85.4°F 83.5°F
Aug 21 82.7°F 86.3°F 83.6°F
Aug 22 82.7°F 85.2°F 83.7°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 137 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, 78.9°F in Summer, and 75.6°F in Autumn.