Measurements:
°C
°F
Atami
76°F
NW 1 mph
Feels like: 80°F
Precip: 29%
World Resorts Japan Atami Weather

Atami Sea Water Temperature

Current Sea Water Temperature:
+83.8°F
Maximum Sea Water Temperature in August: 88.6°F
Minimum Sea Water Temperature in August: 78.6°F
Average water temperature in August: 83.8°F

Sea Water Temperature for the Last 10 Days:

August 19 83.8°F August 14 85.0°F
August 18 84.0°F August 13 84.8°F
August 17 84.2°F August 12 85.0°F
August 16 84.6°F August 11 85.0°F
August 15 85.4°F August 10 85.4°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: 2026 2025 2024

The average sea surface temperature in August 2026 for Atami was 84.8°F. The maximum and minimum values were 83.8°F and 86.2°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: 2026 2025 2024

The average sea surface temperature in July 2026 for Atami was 81.1°F. The maximum and minimum values were 76.2°F and 86.4°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 87.0 °F
September 83.3 °F
Warmest sea temperature:
August 83.7 °F
September 81.9 °F
July 79.6 °F
The most cold months:
January 48.1 °F
February 49.2 °F
December 53.3 °F
The most rainy months:
September 8 days
June 8 days
July 7 days
The most windy months:
March 8 mph
April 8 mph
February 8 mph

Atami on the Weather Map

Japan Resorts:
NAME
Atami +76
Fukuoka +84
Hakone +82
Hiroshima +76
Kamakura +82
Kobe +82
Kyoto +86
Nagasaki +84
Nagoya +86
Nara +84
Okinawa +84
Osaka +86
Sapporo +70
Tokyo +86
Yokohama +82
24 Hours Weather Forecast
Atami
Local time: 21:31
20 aug, thursday
0000 74°F
SE
1 mph
0300 74°F
S
1 mph
0600 74°F
W
2 mph
0900 82°F
W
5 mph
1200 86°F
W
5 mph
1500 84°F
W
2 mph
1800 80°F
E
1 mph
2100 76°F
E
2 mph