Measurements:
°C
°F
Atami
34°F
SW 6 mph
Feels like: 28°F
Precip: 100%
World Resorts Japan Atami Weather

Atami Sea Water Temperature

Current Sea Water Temperature:
+59.6°F
Maximum Sea Water Temperature in January: 67.2°F
Minimum Sea Water Temperature in January: 57.8°F
Average water temperature in January: 61.9°F

Sea Water Temperature for the Last 10 Days:

January 30 59.6°F January 25 61.0°F
January 29 58.8°F January 24 60.4°F
January 28 59.2°F January 23 60.6°F
January 27 58.8°F January 22 60.6°F
January 26 59.6°F January 21 60.6°F

When is the Warmest Sea for Atami?

According to our data for the last three years for Atami the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Atami was 84.2°F. The maximum and minimum values were 81.4°F and 86.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Atami was 83.0°F. The maximum and minimum values were 79.0°F and 86.0°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Atami was 83.3°F. The maximum and minimum values were 80.0°F and 85.8°F respectively.

Best Time to Visit Atami
The most sunny months:
January 17 days
December 17 days
May 13 days
The most warm months:
August 90.1 °F
July 87.1 °F
September 83.3 °F
Warmest sea temperature:
August 83.7 °F
September 81.9 °F
July 79.5 °F
The most cold months:
January 48.1 °F
February 49.1 °F
December 53.3 °F
The most rainy months:
September 8 days
June 8 days
July 7 days
The most windy months:
March 9 mph
April 8 mph
February 8 mph

Atami on the Weather Map

Japan Resorts:
NAME
Fukuoka +36
Hakone +36
Hiroshima +30
Kamakura +38
Kobe +34
Kyoto +28
Nagasaki +38
Nagoya +32
Nara +30
Noboribetsu +24
Okinawa +58
Osaka +34
Sapporo +22
Tokyo +36
Yokohama +38
24 Hours Weather Forecast
Atami
Local time: 00:38
31 jan, saturday
0300 28°F
NW
1 mph
0600 26°F
NW
1 mph
0900 34°F
N
1 mph
1200 38°F
NW
2 mph
1500 38°F
N
5 mph
1800 32°F
NW
2 mph
2100 30°F
S
2 mph
01 feb, sunday
0000 36°F
S
4 mph