All data are in degrees Fahrenheit

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Water temperature in Nagoya

Detailed information about the current water temperature in Nagoya. 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 Nagoya now

48.9

°F

January 18, 22:26

Trend:

stable

Yesterday:

50.1°F

Tomorrow:

48.9°F

Sunrise:

07:00

Sunset:

17:06

Day Length:

10 h. 6 min.

Nagoya in January

Minimum:

54.9°F

Average:

56.9°F

Maximum:

61.0°F

Sea water temperature in Nagoya today

As of now, in Nagoya, the water temperature is 48.9°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 5.5°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

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 57.9°F on 2016, while the historical minimum was 52.2°F on 2021.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 48.5°F, the minimum temperature may reach 48.0°F, and the maximum might stay at 48.9°F.

Daily water temperature in Nagoya

Date Current Year

actual* / forecast**

last year 10 years average
Jan 4 56.0°F 53.9°F 56.1°F
Jan 5 56.1°F 54.0°F 56.3°F
Jan 6 56.2°F 54.1°F 56.2°F
Jan 7 56.3°F 53.9°F 55.8°F
Jan 8 56.1°F 54.3°F 55.9°F
Jan 9 55.6°F 54.5°F 55.5°F
Jan 10 55.5°F 54.1°F 55.4°F
Jan 11 54.4°F 54.1°F 54.9°F
Jan 12 54.1°F 54.2°F 54.8°F
Jan 13 54.3°F 53.7°F 54.5°F
Jan 14 53.9°F 53.7°F 54.4°F
Jan 15 54.0°F 53.9°F 54.4°F
Jan 16 52.3°F 54.1°F 54.2°F
Jan 17 50.1°F 54.1°F 54.1°F
Jan 18 48.9°F 54.1°F 54.4°F
Jan 19 48.9°F 54.0°F 54.4°F
Jan 20 48.8°F 54.2°F 54.3°F
Jan 21 48.6°F 54.1°F 54.1°F
Jan 22 48.5°F 54.0°F 54.0°F
Jan 23 48.4°F 53.7°F 53.9°F
Jan 24 48.2°F 53.8°F 53.7°F
Jan 25 48.0°F 52.7°F 53.5°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 Nagoya by month

In Nagoya, the months July through October offer comfortable swimming conditions, which amounts to 124 swimming days.
The warmest water in Nagoya was recorded on August 22, 2025, reaching a 89.0°F. While the coldest temperature occurred on February 16, 2018, dipping to 47.6°F. The average readings by season are 56.0°F in Winter, 60.0°F in Spring, 79.3°F in Summer, and 73.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Hekinan 51.0°F 21mi
Tsu 49.4°F 38mi
Hamamatsu 56.5°F 57mi

* current water temperature in this city

** straight line distance from Nagoya