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

59.1

°F

April 26, 11:05

Trend:

stable

Yesterday:

58.7°F

Tomorrow:

58.9°F

Sunrise:

05:27

Sunset:

18:50

Day Length:

13 h. 23 min.

Hiroshima in May

Minimum:

56.8°F

Average:

58.4°F

Maximum:

59.3°F

Sea water temperature in Hiroshima today

As of now, in Hiroshima, 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 1.0°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 61.5°F on 2021, while the historical minimum was 57.8°F on 2020.

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 maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 59.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Hiroshima

Date Current Year

actual* / forecast**

last year 10 years average
Apr 12 57.0°F 57.8°F 56.8°F
Apr 13 57.6°F 57.9°F 56.7°F
Apr 14 60.2°F 58.0°F 57.3°F
Apr 15 60.7°F 58.3°F 57.5°F
Apr 16 60.6°F 56.6°F 57.4°F
Apr 17 58.0°F 55.1°F 57.6°F
Apr 18 58.4°F 55.4°F 58.0°F
Apr 19 59.0°F 59.2°F 58.2°F
Apr 20 59.2°F 59.3°F 58.2°F
Apr 21 59.2°F 59.2°F 58.2°F
Apr 22 60.3°F 59.5°F 58.5°F
Apr 23 60.7°F 59.5°F 59.0°F
Apr 24 60.2°F 59.8°F 59.1°F
Apr 25 58.7°F 60.9°F 59.8°F
Apr 26 59.1°F 60.0°F 60.1°F
Apr 27 58.9°F 59.7°F 59.9°F
Apr 28 58.7°F 60.0°F 59.8°F
Apr 29 59.3°F 59.7°F 60.3°F
Apr 30 59.6°F 60.2°F 60.6°F
May 1 59.6°F 60.2°F 60.7°F
May 2 59.8°F 61.2°F 60.9°F
May 3 59.9°F 60.5°F 60.9°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 59.4°F 21mi
Matsuyama 58.6°F 43mi
Fukuyama 60.9°F 53mi
Saijō 62.0°F 54mi
Niihama 62.3°F 58mi

* current water temperature in this city

** straight line distance from Hiroshima