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 9.72°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.

49.5

°F

March 15, 12:00

Trend:

stable

Yesterday:

49.6°F

Tomorrow:

49.6°F

Sunrise:

06:18

Sunset:

18:14

Day Length:

11 h. 56 min.

Niihama in March

Minimum:

54.3°F

Average:

56.8°F

Maximum:

58.7°F

Sea water temperature in Niihama today

As of now, in Niihama, the water temperature is 49.5°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 4.1°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 rise 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 minimum temperature for this date. The maximum temperature recorded for this date was 58.7°F on 2016, while the historical minimum was 52.0°F on 2019.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 50.1°F, with minimum temperature starting at 49.6°F, while the maximum might reach 50.6°F.

Daily water temperature in Niihama

Date	Current Year actual* / forecast**	last year	10 years average
Mar 1	49.2°F	52.6°F	51.9°F
Mar 2	50.0°F	52.4°F	52.4°F
Mar 3	50.5°F	51.7°F	52.3°F
Mar 4	51.1°F	51.4°F	52.5°F
Mar 5	51.7°F	52.0°F	52.8°F
Mar 6	52.3°F	52.6°F	53.0°F
Mar 7	50.5°F	53.0°F	52.7°F
Mar 8	51.1°F	51.7°F	52.8°F
Mar 9	48.5°F	51.1°F	52.6°F
Mar 10	48.4°F	51.2°F	52.6°F
Mar 11	49.4°F	51.3°F	52.9°F
Mar 12	50.2°F	52.0°F	53.1°F
Mar 13	50.8°F	51.7°F	53.2°F
Mar 14	49.6°F	51.8°F	53.7°F
Mar 15	49.5°F	52.1°F	53.6°F
Mar 16	49.6°F	52.8°F	53.7°F
Mar 17	50.0°F	53.2°F	54.1°F
Mar 18	49.9°F	53.3°F	54.1°F
Mar 19	50.1°F	52.9°F	54.2°F
Mar 20	50.3°F	53.2°F	54.4°F
Mar 21	50.5°F	53.5°F	54.6°F
Mar 22	50.6°F	52.6°F	54.7°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 122 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, 58.8°F in Spring, 78.5°F in Summer, and 74.7°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saijō	51.0°F	8mi
Matsuyama	51.0°F	32mi
Marugame	47.7°F	35mi
Fukuyama	50.7°F	36mi
Takamatsu	47.0°F	50mi
Kurashiki	47.2°F	50mi
Hiroshima	53.3°F	58mi
Okayama	47.9°F	60mi

* current water temperature in this city

** straight line distance from Niihama