What is the current water temperature in Niigata?

Q: What is the current water temperature in Niigata?

As of now, in Niigata, the water temperature is 12.28°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.

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Water temperature in Niigata

Detailed information about the current water temperature in Niigata. 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.

54.1

°F

January 13, 11:48

Trend:

decreasing

Yesterday:

54.5°F

Tomorrow:

53.9°F

Sunrise:

06:59

Sunset:

16:46

Day Length:

9 h. 47 min.

Niigata in January

Minimum:

55.4°F

Average:

56.3°F

Maximum:

57.1°F

Sea water temperature in Niigata today

As of now, in Niigata, the water temperature is 54.1°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 0.3°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 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 55.4°F on 2020, while the historical minimum was 52.6°F on 2025.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 53.4°F, the minimum temperature may reach 53.0°F, and the maximum might stay at 53.9°F.

Daily water temperature in Niigata

Date	Current Year actual* / forecast**	last year	10 years average
Jan 1	55.5°F	56.9°F	56.3°F
Jan 2	55.1°F	56.4°F	55.9°F
Jan 3	55.1°F	56.0°F	55.6°F
Jan 4	55.1°F	55.7°F	55.5°F
Jan 5	55.4°F	55.9°F	55.9°F
Jan 6	55.4°F	55.9°F	55.9°F
Jan 7	55.4°F	55.9°F	55.7°F
Jan 8	55.3°F	55.7°F	55.5°F
Jan 9	55.5°F	55.6°F	55.5°F
Jan 10	54.7°F	55.7°F	55.3°F
Jan 11	54.5°F	55.4°F	55.0°F
Jan 12	54.5°F	54.7°F	54.7°F
Jan 13	54.1°F	52.6°F	54.4°F
Jan 14	53.9°F	52.5°F	54.2°F
Jan 15	53.7°F	52.5°F	54.0°F
Jan 16	53.6°F	53.2°F	53.9°F
Jan 17	53.5°F	53.3°F	53.8°F
Jan 18	53.2°F	53.2°F	53.4°F
Jan 19	53.0°F	53.3°F	53.3°F
Jan 20	53.1°F	53.3°F	53.4°F
Dec 30	55.8°F	57.1°F	56.8°F
Dec 31	55.7°F	56.9°F	56.5°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 Niigata by month

In Niigata, the months July through September offer comfortable swimming conditions, which amounts to 101 swimming days.

The warmest water in Niigata was recorded on August 6, 2023, reaching a 86.6°F. While the coldest temperature occurred on March 3, 2022, dipping to 47.5°F. The average readings by season are 54.7°F in Winter, 53.7°F in Spring, 75.5°F in Summer, and 72.0°F in Autumn.