All data are in degrees Fahrenheit

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Water temperature in Hiroshima

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

56.0

°F

April 11, 21:10

Trend:

stable

Yesterday:

57.7°F

Tomorrow:

56.2°F

Sunrise:

05:45

Sunset:

18:38

Day Length:

12 h. 53 min.

Hiroshima in April

Minimum:

56.2°F

Average:

58.3°F

Maximum:

59.4°F

Sea water temperature in Hiroshima today

As of now, in Hiroshima, the water temperature is 56.0°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 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 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 58.1°F on 2024, while the historical minimum was 54.7°F on 2020.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 56.6°F, with minimum temperature starting at 56.1°F, while the maximum might reach 57.5°F.

Daily water temperature in Hiroshima

Date Current Year

actual* / forecast**

last year 10 years average
Mar 28 55.0°F 56.1°F 54.5°F
Mar 29 55.4°F 56.3°F 54.6°F
Mar 30 55.7°F 56.5°F 54.7°F
Mar 31 58.7°F 56.6°F 55.4°F
Apr 1 58.4°F 56.7°F 56.0°F
Apr 2 57.8°F 56.8°F 55.6°F
Apr 3 56.2°F 54.4°F 55.3°F
Apr 4 56.7°F 54.1°F 55.5°F
Apr 5 57.2°F 50.4°F 55.6°F
Apr 6 58.0°F 54.3°F 56.0°F
Apr 7 59.0°F 54.1°F 56.1°F
Apr 8 57.8°F 55.8°F 56.6°F
Apr 9 57.7°F 55.4°F 56.4°F
Apr 10 57.7°F 56.0°F 56.6°F
Apr 11 56.0°F 56.2°F 56.5°F
Apr 12 56.2°F 57.8°F 56.8°F
Apr 13 56.1°F 57.9°F 56.6°F
Apr 14 56.5°F 58.0°F 57.0°F
Apr 15 56.6°F 58.3°F 57.1°F
Apr 16 56.6°F 56.6°F 57.1°F
Apr 17 57.1°F 55.1°F 57.6°F
Apr 18 57.5°F 55.4°F 58.0°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 Hiroshima by month

In Hiroshima, the months July through October offer comfortable swimming conditions, which amounts to 114 swimming days.
The warmest water in Hiroshima was recorded on August 3, 2024, reaching a 86.4°F. While the coldest temperature occurred on March 7, 2026, dipping to 49.0°F. The average readings by season are 56.9°F in Winter, 58.2°F in Spring, 76.8°F in Summer, and 73.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Iwakuni 57.2°F 21mi
Matsuyama 57.1°F 43mi
Fukuyama 57.8°F 53mi
Saijō 59.6°F 54mi
Niihama 59.8°F 58mi

* current water temperature in this city

** straight line distance from Hiroshima