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 20.25°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

68.5

°F

November 21, 21:49

Trend:

decreasing

Yesterday:

69.4°F

Tomorrow:

68.2°F

Sunrise:

06:19

Sunset:

16:29

Day Length:

10 h. 10 min.

Isumi in November

Minimum:

58.4°F

Average:

62.3°F

Maximum:

64.7°F

Sea water temperature in Isumi today

As of now, in Isumi, the water temperature is 68.5°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 about the same as 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 70.6°F on 2016, while the historical minimum was 65.1°F on 2023.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 68.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Isumi

Date	Current Year actual* / forecast**	last year	10 years average
Nov 7	71.6°F	73.1°F	71.2°F
Nov 8	71.8°F	69.7°F	71.0°F
Nov 9	71.3°F	70.5°F	70.4°F
Nov 10	71.0°F	69.5°F	70.1°F
Nov 11	71.2°F	70.4°F	70.3°F
Nov 12	70.8°F	70.3°F	69.9°F
Nov 13	70.0°F	69.7°F	69.2°F
Nov 14	70.3°F	70.1°F	69.4°F
Nov 15	70.4°F	71.3°F	69.6°F
Nov 16	71.0°F	69.4°F	69.3°F
Nov 17	71.1°F	69.4°F	69.2°F
Nov 18	71.5°F	68.2°F	68.9°F
Nov 19	70.5°F	66.1°F	68.8°F
Nov 20	69.4°F	65.3°F	68.7°F
Nov 21	68.5°F	65.1°F	68.3°F
Nov 22	68.2°F	65.8°F	68.1°F
Nov 23	68.7°F	68.6°F	68.6°F
Nov 24	68.5°F	67.6°F	68.4°F
Nov 25	68.4°F	67.7°F	68.3°F
Nov 26	68.6°F	67.6°F	68.5°F
Nov 27	67.9°F	65.6°F	67.8°F
Nov 28	67.7°F	64.1°F	67.6°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	69.7°F	8mi
Ichihara	66.4°F	27mi
Kisarazu	66.1°F	29mi
Chiba	66.4°F	30mi
Kimitsu	66.1°F	31mi
Futtsu	66.4°F	34mi
Honchō	65.8°F	40mi
Yokosuka	68.0°F	42mi
Kawasaki	65.9°F	44mi
Yokohama	66.1°F	45mi

* current water temperature in this city

** straight line distance from Isumi