All data are in degrees Fahrenheit

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Water temperature in Matsuyama

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

81.1

°F

August 22, 02:44

Trend:

increasing

Yesterday:

80.9°F

Tomorrow:

81.2°F

Sunrise:

05:35

Sunset:

18:48

Day Length:

13 h. 13 min.

Matsuyama in August

Minimum:

56.4°F

Average:

57.9°F

Maximum:

59.3°F

Sea water temperature in Matsuyama today

As of now, in Matsuyama, the water temperature is 81.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.5°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 80.4°F on 2025, while the historical minimum was 75.8°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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 80.7°F, the minimum temperature may reach 80.2°F, and the maximum might stay at 81.2°F.

Daily water temperature in Matsuyama

Date Current Year

actual* / forecast**

last year 10 years average
Aug 8 77.8°F 80.3°F 78.4°F
Aug 9 77.9°F 80.4°F 78.5°F
Aug 10 78.2°F 80.4°F 78.5°F
Aug 11 77.9°F 80.4°F 78.5°F
Aug 12 77.1°F 79.3°F 78.2°F
Aug 13 77.3°F 79.3°F 78.5°F
Aug 14 77.0°F 78.8°F 78.6°F
Aug 15 78.4°F 78.7°F 78.7°F
Aug 16 78.6°F 78.0°F 78.7°F
Aug 17 78.9°F 79.3°F 78.4°F
Aug 18 79.1°F 79.6°F 78.5°F
Aug 19 77.7°F 79.4°F 78.3°F
Aug 20 79.0°F 79.3°F 78.7°F
Aug 21 80.9°F 79.2°F 78.4°F
Aug 22 81.1°F 80.4°F 78.6°F
Aug 23 81.2°F 79.5°F 78.6°F
Aug 24 80.9°F 79.2°F 78.4°F
Aug 25 80.9°F 80.2°F 78.3°F
Aug 26 80.8°F 80.3°F 78.2°F
Aug 27 80.6°F 78.6°F 78.1°F
Aug 28 80.5°F 77.7°F 78.0°F
Aug 29 80.2°F 77.9°F 77.7°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 Matsuyama by month

In Matsuyama, the months July through October offer comfortable swimming conditions, which amounts to 107 swimming days.
The warmest water in Matsuyama was recorded on July 28, 2026, reaching a 82.5°F. While the coldest temperature occurred on March 5, 2022, dipping to 50.0°F. The average readings by season are 57.8°F in Winter, 57.0°F in Spring, 73.3°F in Summer, and 73.4°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Saijō 84.2°F 25mi
Niihama 85.0°F 32mi
Iwakuni 82.7°F 38mi
Hiroshima 82.7°F 43mi
Fukuyama 84.8°F 56mi

* current water temperature in this city

** straight line distance from Matsuyama