What is the current water temperature in Niihama?

Q: What is the current water temperature in Niihama?

As of now, in Niihama, the water temperature is 14.11°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 > 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.

57.4

°F

December 22, 14:25

Trend:

decreasing

Yesterday:

57.9°F

Tomorrow:

57.4°F

Sunrise:

07:09

Sunset:

17:02

Day Length:

9 h. 53 min.

Niihama in December

Minimum:

51.4°F

Average:

55.0°F

Maximum:

56.9°F

Sea water temperature in Niihama today

As of now, in Niihama, the water temperature is 57.4°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 1.2°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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 60.4°F on 2016, while the historical minimum was 55.2°F on 2021.

latest data

last year

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 56.7°F, the minimum temperature may reach 56.0°F, and the maximum might stay at 57.4°F.

Daily water temperature in Niihama

Date	Current Year actual* / forecast**	last year	10 years average
Dec 8	61.1°F	61.1°F	62.0°F
Dec 9	61.5°F	60.7°F	62.0°F
Dec 10	61.7°F	60.3°F	61.7°F
Dec 11	61.5°F	60.9°F	61.5°F
Dec 12	61.6°F	61.3°F	61.5°F
Dec 13	61.7°F	61.4°F	61.3°F
Dec 14	61.9°F	60.7°F	61.1°F
Dec 15	60.1°F	60.8°F	60.7°F
Dec 16	60.6°F	62.0°F	60.7°F
Dec 17	59.2°F	61.5°F	60.1°F
Dec 18	59.3°F	61.1°F	59.7°F
Dec 19	59.5°F	61.2°F	59.6°F
Dec 20	59.7°F	60.9°F	59.4°F
Dec 21	57.9°F	59.8°F	59.0°F
Dec 22	57.4°F	59.7°F	58.6°F
Dec 23	57.4°F	59.3°F	58.5°F
Dec 24	57.1°F	59.2°F	58.3°F
Dec 25	57.0°F	57.7°F	58.1°F
Dec 26	56.7°F	58.1°F	57.8°F
Dec 27	56.6°F	58.0°F	57.7°F
Dec 28	56.3°F	57.7°F	57.5°F
Dec 29	56.0°F	56.4°F	57.1°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

In Niihama, the months July through October offer comfortable swimming conditions, which amounts to 121 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 56.3°F in Winter, 58.9°F in Spring, 78.2°F in Summer, and 74.5°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saijō	59.6°F	8mi
Matsuyama	61.5°F	32mi
Marugame	55.0°F	35mi
Fukuyama	55.5°F	36mi
Takamatsu	58.1°F	50mi
Kurashiki	54.7°F	50mi
Hiroshima	59.5°F	58mi
Okayama	57.0°F	60mi

* current water temperature in this city

** straight line distance from Niihama