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 13.75°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

56.8

°F

March 15, 12:01

Trend:

stable

Yesterday:

56.8°F

Tomorrow:

56.9°F

Sunrise:

06:32

Sunset:

18:28

Day Length:

11 h. 56 min.

Nagasaki in March

Minimum:

59.5°F

Average:

60.9°F

Maximum:

62.7°F

Sea water temperature in Nagasaki today

As of now, in Nagasaki, the water temperature is 56.8°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.0°F lower 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 stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 60.2°F on 2022, while the historical minimum was 57.4°F on 2015.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 57.0°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
Mar 1	55.3°F	59.4°F	58.0°F
Mar 2	55.7°F	59.5°F	58.0°F
Mar 3	56.8°F	59.1°F	58.2°F
Mar 4	56.9°F	59.1°F	58.3°F
Mar 5	57.0°F	59.0°F	58.1°F
Mar 6	57.2°F	59.0°F	58.3°F
Mar 7	56.2°F	59.0°F	57.8°F
Mar 8	56.4°F	59.2°F	57.9°F
Mar 9	56.6°F	59.1°F	58.1°F
Mar 10	56.2°F	58.9°F	57.9°F
Mar 11	56.8°F	59.4°F	58.1°F
Mar 12	55.9°F	59.6°F	58.3°F
Mar 13	56.3°F	59.3°F	58.4°F
Mar 14	56.8°F	58.7°F	58.8°F
Mar 15	56.8°F	58.2°F	58.8°F
Mar 16	56.9°F	57.4°F	58.9°F
Mar 17	56.8°F	57.7°F	58.8°F
Mar 18	56.9°F	58.6°F	59.0°F
Mar 19	57.1°F	58.9°F	59.1°F
Mar 20	57.1°F	58.9°F	59.1°F
Mar 21	57.2°F	59.7°F	59.3°F
Mar 22	57.3°F	59.6°F	59.3°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, 62.6°F in Spring, 78.3°F in Summer, and 75.1°F in Autumn.