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

83.4

°F

July 16, 11:54

Trend:

increasing

Yesterday:

83.2°F

Tomorrow:

83.8°F

Sunrise:

05:09

Sunset:

19:23

Day Length:

14 h. 14 min.

Hiroshima in July

Minimum:

56.1°F

Average:

57.5°F

Maximum:

58.3°F

Sea water temperature in Hiroshima today

As of now, in Hiroshima, the water temperature is 83.4°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 5.8°F higher 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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 81.9°F on 2018, while the historical minimum was 75.1°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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 84.8°F, with minimum temperature starting at 83.8°F, while the maximum might reach 85.9°F.

Daily water temperature in Hiroshima

Date Current Year

actual* / forecast**

last year 10 years average
Jul 2 72.2°F 80.4°F 74.7°F
Jul 3 71.5°F 80.1°F 75.2°F
Jul 4 72.0°F 81.4°F 75.7°F
Jul 5 73.3°F 82.0°F 76.2°F
Jul 6 72.8°F 81.9°F 76.8°F
Jul 7 73.0°F 82.1°F 76.7°F
Jul 8 72.7°F 84.3°F 76.8°F
Jul 9 75.3°F 80.7°F 76.8°F
Jul 10 78.9°F 82.5°F 77.4°F
Jul 11 78.7°F 81.5°F 77.4°F
Jul 12 79.0°F 79.8°F 77.2°F
Jul 13 79.8°F 81.1°F 77.4°F
Jul 14 82.0°F 80.9°F 77.9°F
Jul 15 83.2°F 79.0°F 77.5°F
Jul 16 83.4°F 79.3°F 77.6°F
Jul 17 83.8°F 80.2°F 78.0°F
Jul 18 83.9°F 79.8°F 78.2°F
Jul 19 84.0°F 79.2°F 78.2°F
Jul 20 84.8°F 81.2°F 79.1°F
Jul 21 85.4°F 81.6°F 79.6°F
Jul 22 85.9°F 82.8°F 80.2°F
Jul 23 85.6°F 83.8°F 79.9°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 82.2°F 21mi
Matsuyama 78.4°F 43mi
Fukuyama 80.1°F 53mi
Saijō 81.0°F 54mi
Niihama 83.9°F 58mi

* current water temperature in this city

** straight line distance from Hiroshima