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 11.5°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 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.

52.7

°F

March 10, 00:10

Trend:

stable

Yesterday:

52.7°F

Tomorrow:

53.0°F

Sunrise:

06:25

Sunset:

18:10

Day Length:

11 h. 45 min.

Niihama in March

Minimum:

54.3°F

Average:

56.9°F

Maximum:

58.7°F

Sea water temperature in Niihama today

As of now, in Niihama, the water temperature is 52.7°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 0.5°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 58.7°F on 2016, while the historical minimum was 48.4°F on 2025.

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 suggests a gradual increase. The average temperature is expected to rise up to 53.5°F, with minimum temperature starting at 53.0°F, while the maximum might reach 54.0°F.

Daily water temperature in Niihama

Date	Current Year actual* / forecast**	last year	10 years average
Feb 24	51.7°F	50.4°F	51.8°F
Feb 25	52.4°F	50.9°F	51.9°F
Feb 26	52.0°F	49.0°F	51.6°F
Feb 27	52.6°F	49.5°F	51.9°F
Feb 28	52.8°F	50.0°F	51.8°F
Mar 1	52.1°F	49.2°F	51.5°F
Mar 2	52.5°F	50.0°F	52.0°F
Mar 3	52.7°F	50.5°F	52.0°F
Mar 4	52.5°F	51.1°F	52.1°F
Mar 5	52.5°F	51.7°F	52.4°F
Mar 6	52.1°F	52.3°F	52.6°F
Mar 7	52.9°F	50.5°F	52.4°F
Mar 8	52.9°F	51.1°F	52.4°F
Mar 9	52.7°F	48.5°F	52.2°F
Mar 10	52.7°F	48.4°F	52.2°F
Mar 11	53.0°F	49.4°F	52.5°F
Mar 12	53.3°F	50.2°F	52.8°F
Mar 13	53.4°F	50.8°F	52.9°F
Mar 14	53.5°F	49.6°F	53.0°F
Mar 15	53.5°F	50.5°F	53.0°F
Mar 16	53.7°F	51.0°F	53.2°F
Mar 17	54.0°F	50.8°F	53.4°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

In Niihama, the months July through October offer comfortable swimming conditions, which amounts to 124 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 55.9°F in Winter, 58.6°F in Spring, 78.8°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saijō	53.3°F	8mi
Matsuyama	53.5°F	32mi
Marugame	52.2°F	35mi
Fukuyama	54.5°F	36mi
Takamatsu	50.6°F	50mi
Kurashiki	53.3°F	50mi
Hiroshima	51.7°F	58mi
Okayama	50.6°F	60mi

* current water temperature in this city

** straight line distance from Niihama