All data are in degrees Fahrenheit

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Water temperature in Iwakuni

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

71.0

°F

June 4, 11:38

Trend:

stable

Yesterday:

70.7°F

Tomorrow:

71.0°F

Sunrise:

05:00

Sunset:

19:19

Day Length:

14 h. 19 min.

Iwakuni in June

Minimum:

55.9°F

Average:

57.6°F

Maximum:

59.2°F

Sea water temperature in Iwakuni today

As of now, in Iwakuni, the water temperature is 71.0°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 3.9°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 stay about the same.

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 68.5°F on 2021, while the historical minimum was 65.7°F on 2025.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 71.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Iwakuni

Date Current Year

actual* / forecast**

last year 10 years average
May 21 66.9°F 63.8°F 64.6°F
May 22 65.9°F 64.1°F 64.5°F
May 23 66.1°F 66.9°F 65.1°F
May 24 64.9°F 67.1°F 65.4°F
May 25 65.7°F 67.1°F 66.1°F
May 26 66.7°F 65.5°F 65.8°F
May 27 66.5°F 65.3°F 65.8°F
May 28 66.5°F 64.2°F 65.8°F
May 29 68.5°F 64.3°F 65.9°F
May 30 69.5°F 65.5°F 66.1°F
May 31 69.7°F 65.6°F 66.4°F
Jun 1 70.7°F 64.3°F 66.7°F
Jun 2 70.4°F 64.6°F 66.4°F
Jun 3 70.7°F 64.8°F 66.9°F
Jun 4 71.0°F 65.7°F 67.2°F
Jun 5 71.0°F 64.6°F 67.1°F
Jun 6 71.1°F 65.2°F 67.2°F
Jun 7 71.1°F 65.5°F 67.2°F
Jun 8 71.1°F 65.8°F 67.2°F
Jun 9 71.5°F 66.1°F 67.6°F
Jun 10 71.9°F 66.3°F 68.0°F
Jun 11 72.2°F 66.8°F 68.3°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 Iwakuni by month

In Iwakuni, the months July through October offer comfortable swimming conditions, which amounts to 114 swimming days.
The warmest water in Iwakuni was recorded on August 9, 2024, reaching a 86.1°F. While the coldest temperature occurred on February 16, 2018, dipping to 48.6°F. The average readings by season are 56.7°F in Winter, 57.9°F in Spring, 76.6°F in Summer, and 73.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Hiroshima 71.1°F 21mi
Matsuyama 67.5°F 38mi
Saijō 72.5°F 58mi
Ōita 72.9°F 73mi
Beppu 72.5°F 74mi

* current water temperature in this city

** straight line distance from Iwakuni