Measurements:
°C
°F
Atami
70°F
W 2 mph
Feels like: 70°F
Precip: 68%
World Resorts Japan Atami Weather

Atami Sea Water Temperature

Current Sea Water Temperature:
+79.8°F
Maximum Sea Water Temperature in September: 87.2°F
Minimum Sea Water Temperature in September: 77.4°F
Average water temperature in September: 81.9°F

Sea Water Temperature for the Last 10 Days:

September 28 79.8°F September 23 80.6°F
September 27 80.0°F September 22 81.2°F
September 26 80.2°F September 21 80.0°F
September 25 80.4°F September 20 80.6°F
September 24 80.0°F September 19 79.4°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 84.7°F. The maximum and minimum values were 83.6°F and 86.2°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Atami was 81.3°F. The maximum and minimum values were 79.0°F and 83.6°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 89.7 °F
July 87.0 °F
September 82.7 °F
Warmest sea temperature:
August 83.8 °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
F°
Atami +70
Fukuoka +68
Hakone +72
Hiroshima +66
Kamakura +72
Kobe +68
Kyoto +66
Nagasaki +76
Nagoya +68
Nara +68
Okinawa +86
Osaka +70
Sapporo +54
Tokyo +70
Yokohama +70
24 Hours Weather Forecast
Atami
Local time: 08:11
29 sep, tuesday
0900 70°F
W
2 mph
1200 68°F
W
6 mph
1500 64°F
W
5 mph
1800 64°F
W
7 mph
2100 62°F
W
10 mph
30 sep, wednesday
0000 62°F
SW
6 mph
0300 60°F
SW
6 mph
0600 62°F
SW
7 mph