What is the current water temperature in Isumi?

Q: What is the current water temperature in Isumi?

As of now, in Isumi, the water temperature is 17.57°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Japan > Isumi

Water temperature in Isumi

Detailed information about the current water temperature in Isumi. 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.

63.6

°F

December 22, 14:18

Trend:

stable

Yesterday:

63.5°F

Tomorrow:

63.4°F

Sunrise:

06:44

Sunset:

16:31

Day Length:

9 h. 47 min.

Isumi in December

Minimum:

56.7°F

Average:

61.4°F

Maximum:

65.7°F

Sea water temperature in Isumi today

As of now, in Isumi, the water temperature is 63.6°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 0.6°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 fall 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 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 67.4°F on 2015, while the historical minimum was 61.2°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 63.2°F, the minimum temperature may reach 62.6°F, and the maximum might stay at 63.6°F.

Daily water temperature in Isumi

Date	Current Year actual* / forecast**	last year	10 years average
Dec 8	67.4°F	65.1°F	65.9°F
Dec 9	64.3°F	63.4°F	65.6°F
Dec 10	65.6°F	63.5°F	65.9°F
Dec 11	65.2°F	63.6°F	66.1°F
Dec 12	63.8°F	63.8°F	65.5°F
Dec 13	65.5°F	66.5°F	65.8°F
Dec 14	64.8°F	63.9°F	64.8°F
Dec 15	64.3°F	63.9°F	64.7°F
Dec 16	65.8°F	66.5°F	65.1°F
Dec 17	64.9°F	62.5°F	64.4°F
Dec 18	64.8°F	62.0°F	64.1°F
Dec 19	64.3°F	62.4°F	64.0°F
Dec 20	63.1°F	62.4°F	64.0°F
Dec 21	63.5°F	61.3°F	64.1°F
Dec 22	63.6°F	61.2°F	64.2°F
Dec 23	63.4°F	61.7°F	64.0°F
Dec 24	63.0°F	61.3°F	63.6°F
Dec 25	62.6°F	61.2°F	63.2°F
Dec 26	63.3°F	61.0°F	63.9°F
Dec 27	63.6°F	64.8°F	64.2°F
Dec 28	63.4°F	64.3°F	64.0°F
Dec 29	63.2°F	62.5°F	63.8°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 Isumi by month

In Isumi, the months July through October offer comfortable swimming conditions, which amounts to 102 swimming days.

The warmest water in Isumi was recorded on August 17, 2024, reaching a 82.8°F. While the coldest temperature occurred on February 18, 2018, dipping to 56.0°F. The average readings by season are 62.0°F in Winter, 62.0°F in Spring, 74.0°F in Summer, and 73.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Katsuura	65.1°F	8mi
Ichihara	57.2°F	27mi
Kisarazu	60.0°F	29mi
Chiba	56.7°F	30mi
Kimitsu	59.9°F	31mi
Futtsu	60.6°F	34mi
Honchō	55.9°F	40mi
Yokosuka	61.6°F	42mi
Kawasaki	58.3°F	44mi
Yokohama	59.4°F	45mi

* current water temperature in this city

** straight line distance from Isumi