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Japan > Niihama

Water temperature in Niihama

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

59.1

°F

December 24, 19:00

Trend:

decreasing

Yesterday:

59.2°F

Tomorrow:

59.0°F

Sunrise:

07:09

Sunset:

17:03

Day Length:

9 h. 54 min.

Niihama in December

Minimum:

51.4°F

Average:

55.1°F

Maximum:

56.9°F

Sea water temperature in Niihama today

As of now, in Niihama, the water temperature is 59.1°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 0.9°F higher 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 slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 59.7°F on 2016, while the historical minimum was 55.4°F on 2021.

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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 58.5°F, the minimum temperature may reach 58.1°F, and the maximum might stay at 59.0°F.

Daily water temperature in Niihama

Date Current Year

actual* / forecast**

 last year 10 years average
Dec 10 61.1°F 61.7°F 61.6°F
Dec 11 61.3°F 61.5°F 61.4°F
Dec 12 61.8°F 61.6°F 61.5°F
Dec 13 62.0°F 61.7°F 61.4°F
Dec 14 62.3°F 61.9°F 61.3°F
Dec 15 59.9°F 60.1°F 60.7°F
Dec 16 59.8°F 60.6°F 60.7°F
Dec 17 59.8°F 59.2°F 60.2°F
Dec 18 58.8°F 59.3°F 59.7°F
Dec 19 58.3°F 59.5°F 59.6°F
Dec 20 57.3°F 59.7°F 59.2°F
Dec 21 59.1°F 57.9°F 58.9°F
Dec 22 59.2°F 58.2°F 58.5°F
Dec 23 59.2°F 58.3°F 58.5°F
Dec 24 59.1°F 58.4°F 58.2°F
Dec 25 59.0°F 57.9°F 58.1°F
Dec 26 58.8°F 57.3°F 57.8°F
Dec 27 58.7°F 57.4°F 57.8°F
Dec 28 58.4°F 57.5°F 57.5°F
Dec 29 58.1°F 58.2°F 57.2°F
Dec 30 58.3°F 58.1°F 57.4°F
Dec 31 58.3°F 56.1°F 57.4°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 Niihama by month

January

February

March

April

May

June

July

August

September

October

November

December

In Niihama, the months July through October offer comfortable swimming conditions, which amounts to 123 swimming days.
The warmest water in Niihama was recorded on August 3, 2024, reaching a 88.8°F. While the coldest temperature occurred on February 26, 2022, dipping to 48.0°F. The average readings by season are 56.1°F in Winter, 58.7°F in Spring, 78.6°F in Summer, and 74.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Saijō 59.8°F 8mi
Matsuyama 61.7°F 32mi
Marugame 58.1°F 35mi
Fukuyama 57.8°F 36mi
Takamatsu 57.7°F 50mi
Kurashiki 57.3°F 50mi
Hiroshima 59.9°F 58mi
Okayama 57.1°F 60mi

* current water temperature in this city

** straight line distance from Niihama