Water temperature in Niihama
80.8
°F
September 17, 09:44
Trend:
stableYesterday:
81.1°FTomorrow:
81.1°F
Sunrise:
Sunset:
Day Length:
12 h. 21 min.Niihama in September
Minimum:
52.9°FAverage:
55.5°FMaximum:
57.8°FSea water temperature in Niihama today
As of now, in Niihama, the water temperature is 80.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.0°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 rise a bit.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 aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 85.9°F on 2025, while the historical minimum was 79.4°F on 2017.
Daily water temperature in Niihama
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 3 | 86.2°F | 87.5°F | 83.8°F |
| Sep 4 | 86.1°F | 87.0°F | 83.5°F |
| Sep 5 | 85.3°F | 86.0°F | 83.3°F |
| Sep 6 | 84.8°F | 85.3°F | 83.1°F |
| Sep 7 | 84.0°F | 85.2°F | 83.0°F |
| Sep 8 | 83.8°F | 85.2°F | 82.7°F |
| Sep 9 | 83.1°F | 85.2°F | 82.6°F |
| Sep 10 | 82.5°F | 85.7°F | 82.7°F |
| Sep 11 | 81.8°F | 85.2°F | 82.8°F |
| Sep 12 | 80.3°F | 85.4°F | 82.4°F |
| Sep 13 | 81.5°F | 84.9°F | 82.6°F |
| Sep 14 | 81.9°F | 85.3°F | 82.6°F |
| Sep 15 | 81.2°F | 84.4°F | 82.0°F |
| Sep 16 | 81.1°F | 85.3°F | 82.0°F |
| Sep 17 | 80.8°F | 85.9°F | 81.8°F |
| Sep 18 | 81.1°F | 87.0°F | 82.0°F |
| Sep 19 | 80.6°F | 86.1°F | 81.6°F |
| Sep 20 | 80.6°F | 85.1°F | 81.6°F |
| Sep 21 | 80.2°F | 84.3°F | 81.2°F |
| Sep 22 | 79.9°F | 83.2°F | 80.9°F |
| Sep 23 | 79.6°F | 84.1°F | 80.6°F |
| Sep 24 | 79.2°F | 83.3°F | 80.2°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.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Saijō |
80.5°F
|
8mi |
| Matsuyama |
78.1°F
|
32mi |
| Marugame |
80.8°F
|
35mi |
| Fukuyama |
80.9°F
|
36mi |
| Takamatsu |
80.2°F
|
50mi |
| Kurashiki |
81.4°F
|
50mi |
| Hiroshima |
78.0°F
|
58mi |
| Okayama |
80.7°F
|
60mi |
* current water temperature in this city
** straight line distance from Niihama