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Ichihara in September

Find out everything about the water temperature in Ichihara in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in September
Minimum:

72.6 °F

Average:

79.1 °F

Maximum:

87.8 °F

Sea water temperature in Ichihara in September

In the city of Ichihara, the month of September is a great time for swimming. The minimum recorded temperature during this month was 72.6°F on September 27, 2015, with an average temperature being 79.1°F and a maximum temperature reaching 87.8°F on September 1, 2025.

The watter temperature range during this month provides a satisfying and enjoyable experience in the water. Throughout the month of September, the sea temperature gradually gets colder. Starting with an average temperature of 81.2°F at the beginning of the month, it steadily decreases to around 76.6°F by the end.
Date 10 years average 2025 2024
Sep 1 82.1°F 87.8°F 82.7°F
Sep 2 82.0°F 86.8°F 83.2°F
Sep 3 81.8°F 86.0°F 83.6°F
Sep 4 81.1°F 84.5°F 82.9°F
Sep 5 80.9°F 83.8°F 80.9°F
Sep 6 80.8°F 83.9°F 81.1°F
Sep 7 81.1°F 83.9°F 83.7°F
Sep 8 80.9°F 83.7°F 84.0°F
Sep 9 80.8°F 84.7°F 83.7°F
Sep 10 80.5°F 85.6°F 83.9°F
Sep 11 80.6°F 85.7°F 84.6°F
Sep 12 80.4°F 84.9°F 86.1°F
Sep 13 80.3°F 85.2°F 86.0°F
Sep 14 80.1°F 84.5°F 85.3°F
Sep 15 79.8°F 85.2°F 84.6°F
Sep 16 79.0°F 82.7°F 83.7°F
Sep 17 78.8°F 83.3°F 82.9°F
Sep 18 78.9°F 84.5°F 83.5°F
Sep 19 78.7°F 83.6°F 83.3°F
Sep 20 78.3°F 82.8°F 84.5°F
Sep 21 78.3°F 84.7°F 84.9°F
Sep 22 77.8°F 83.5°F 83.8°F
Sep 23 77.5°F 82.6°F 82.8°F
Sep 24 77.2°F 79.8°F 82.0°F
Sep 25 76.4°F 78.2°F 79.3°F
Sep 26 76.0°F 79.7°F 78.8°F
Sep 27 75.8°F 77.9°F 78.2°F
Sep 28 75.7°F 76.1°F 77.7°F
Sep 29 75.7°F 78.9°F 77.2°F
Sep 30 76.0°F 78.1°F 76.9°F

Sea water temperature in Ichihara by month

In Ichihara, the months July through September offer comfortable swimming conditions, which amounts to 105 swimming days. The warmest water in Ichihara was recorded on July 30, 2024, reaching a 88.3°F. While the coldest temperature occurred on February 2, 2019, dipping to 47.9°F. The average readings by season are 55.2°F in Winter, 60.2°F in Spring, 77.9°F in Summer, and 72.0°F in Autumn. September's average temperature is a slight drop from August's average of 82.5°F. In October, the temperature is expected to decrease further, potentially averaging around 71.6°F.

Popular neighboring cities and resorts

City Water temperature* Distance**
Chiba 71.8°F 6mi
Kisarazu 72.2°F 12mi
Honchō 71.7°F 14mi
Kimitsu 72.2°F 17mi
Futtsu 72.4°F 21mi
Kawasaki 72.7°F 21mi
Matsudo 71.7°F 21mi
Tokyo 72.8°F 25mi
Yokohama 72.5°F 25mi
Isumi 75.7°F 27mi

* current water temperature in this city

** straight line distance from Ichihara