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

54.7

°F

January 23, 18:35

Trend:

decreasing

Yesterday:

55.0°F

Tomorrow:

54.7°F

Sunrise:

07:14

Sunset:

17:32

Day Length:

10 h. 18 min.

Iwakuni in January

Minimum:

56.3°F

Average:

58.4°F

Maximum:

59.9°F

Sea water temperature in Iwakuni today

As of now, in Iwakuni, the water temperature is 54.7°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 0.4°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 stay about the same.

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 falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 56.2°F on 2020, while the historical minimum was 54.2°F on 2025.

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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 53.9°F, the minimum temperature may reach 53.5°F, and the maximum might stay at 54.7°F.

Daily water temperature in Iwakuni

Date Current Year

actual* / forecast**

last year 10 years average
Jan 9 57.5°F 56.3°F 56.5°F
Jan 10 57.3°F 55.3°F 56.3°F
Jan 11 57.1°F 54.8°F 56.2°F
Jan 12 56.8°F 55.1°F 55.9°F
Jan 13 57.0°F 55.4°F 56.1°F
Jan 14 56.9°F 55.5°F 56.2°F
Jan 15 56.9°F 55.6°F 56.1°F
Jan 16 55.8°F 55.8°F 56.0°F
Jan 17 55.4°F 55.6°F 55.9°F
Jan 18 55.0°F 55.7°F 55.9°F
Jan 19 55.9°F 55.8°F 55.9°F
Jan 20 55.8°F 55.6°F 55.7°F
Jan 21 55.6°F 54.8°F 55.2°F
Jan 22 55.0°F 54.0°F 55.0°F
Jan 23 54.7°F 54.2°F 55.1°F
Jan 24 54.7°F 54.3°F 55.1°F
Jan 25 54.1°F 53.5°F 54.5°F
Jan 26 54.0°F 53.9°F 54.4°F
Jan 27 53.9°F 54.3°F 54.3°F
Jan 28 53.6°F 54.1°F 54.1°F
Jan 29 53.7°F 54.3°F 54.2°F
Jan 30 53.5°F 53.5°F 53.9°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 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 56.8°F in Winter, 57.8°F in Spring, 76.6°F in Summer, and 73.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Hiroshima 54.9°F 21mi
Matsuyama 56.2°F 38mi
Saijō 55.8°F 58mi
Ōita 58.3°F 73mi
Beppu 57.9°F 74mi

* current water temperature in this city

** straight line distance from Iwakuni