Water temperature in Isumi
71.9
°F
June 23, 00:22
Trend:
increasingYesterday:
71.5°FTomorrow:
72.2°F
Sunrise:
Sunset:
Day Length:
14 h. 32 min.Isumi in June
Minimum:
58.6°FAverage:
62.1°FMaximum:
65.8°FSea water temperature in Isumi today
As of now, in Isumi, the water temperature is 71.9°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 1.5°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 rise a bit.Recent sea temperature and forecast
The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 72.6°F on 2025, while the historical minimum was 68.0°F on 2024.
Daily water temperature in Isumi
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Jun 9 | 69.8°F | 69.6°F | 68.5°F |
| Jun 10 | 69.7°F | 69.6°F | 68.8°F |
| Jun 11 | 70.4°F | 69.7°F | 69.1°F |
| Jun 12 | 72.0°F | 69.5°F | 69.4°F |
| Jun 13 | 72.2°F | 69.7°F | 69.5°F |
| Jun 14 | 71.2°F | 69.9°F | 68.9°F |
| Jun 15 | 71.0°F | 70.2°F | 68.6°F |
| Jun 16 | 70.0°F | 70.4°F | 68.9°F |
| Jun 17 | 71.5°F | 71.8°F | 68.8°F |
| Jun 18 | 71.7°F | 69.6°F | 69.0°F |
| Jun 19 | 71.5°F | 70.1°F | 69.2°F |
| Jun 20 | 71.6°F | 72.7°F | 69.9°F |
| Jun 21 | 72.0°F | 73.8°F | 70.4°F |
| Jun 22 | 71.5°F | 72.6°F | 70.0°F |
| Jun 23 | 71.9°F | 72.6°F | 70.4°F |
| Jun 24 | 72.2°F | 72.5°F | 70.8°F |
| Jun 25 | 71.7°F | 73.5°F | 70.3°F |
| Jun 26 | 72.6°F | 74.2°F | 71.1°F |
| Jun 27 | 72.6°F | 73.8°F | 71.1°F |
| Jun 28 | 72.9°F | 73.9°F | 71.4°F |
| Jun 29 | 73.2°F | 72.5°F | 71.7°F |
| Jun 30 | 73.0°F | 71.5°F | 71.5°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** |
|---|---|---|
| Katsuura |
73.3°F
|
8mi |
| Ichihara |
73.0°F
|
27mi |
| Kisarazu |
71.8°F
|
29mi |
| Chiba |
73.0°F
|
30mi |
| Kimitsu |
71.8°F
|
31mi |
| Futtsu |
72.0°F
|
34mi |
| Honchō |
72.8°F
|
40mi |
| Yokosuka |
72.5°F
|
42mi |
| Kawasaki |
72.8°F
|
44mi |
| Yokohama |
73.0°F
|
45mi |
* current water temperature in this city
** straight line distance from Isumi