What is the current water temperature in Nagasaki?

Q: What is the current water temperature in Nagasaki?

As of now, in Nagasaki, the water temperature is 18.06°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Japan > Nagasaki

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.

64.5

°F

April 29, 18:27

Trend:

increasing

Yesterday:

64.3°F

Tomorrow:

64.7°F

Sunrise:

05:36

Sunset:

19:00

Day Length:

13 h. 24 min.

Nagasaki in May

Minimum:

59.3°F

Average:

61.1°F

Maximum:

62.7°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 64.5°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 0.8°F higher 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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 65.5°F on 2024, while the historical minimum was 60.4°F on 2020.

latest data

last year

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 65.1°F, with minimum temperature starting at 64.7°F, while the maximum might reach 65.5°F.

Daily water temperature in Nagasaki

Date	Current Year actual* / forecast**	last year	10 years average
Apr 15	64.3°F	60.0°F	62.2°F
Apr 16	63.9°F	59.6°F	62.2°F
Apr 17	64.2°F	60.3°F	62.4°F
Apr 18	64.1°F	61.5°F	62.6°F
Apr 19	64.7°F	61.8°F	62.7°F
Apr 20	64.7°F	61.9°F	62.7°F
Apr 21	64.7°F	63.5°F	63.0°F
Apr 22	64.2°F	63.2°F	63.1°F
Apr 23	64.1°F	63.2°F	63.2°F
Apr 24	64.6°F	63.2°F	63.2°F
Apr 25	64.0°F	63.4°F	63.5°F
Apr 26	65.1°F	62.3°F	63.7°F
Apr 27	63.2°F	62.7°F	63.4°F
Apr 28	64.3°F	63.9°F	63.7°F
Apr 29	64.5°F	63.7°F	63.8°F
Apr 30	64.7°F	63.2°F	63.9°F
May 1	65.0°F	63.4°F	64.2°F
May 2	65.3°F	64.5°F	64.6°F
May 3	65.1°F	63.7°F	64.4°F
May 4	65.1°F	63.9°F	64.3°F
May 5	65.2°F	63.5°F	64.4°F
May 6	65.5°F	63.7°F	64.7°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 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, 62.6°F in Spring, 78.8°F in Summer, and 75.6°F in Autumn.