Average sea water temperature in September:
+78.7°F
| Minimum sea water temperature in September: | 83.5°F |
| Maximum sea water temperature in September: | 74.7°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 78.6°F. The highest and lowest sea temperatures during the month were 80.2°F and 76.1°F.
Monthly sea water temperature in Atami, °F
Which Japan resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Okinawa | 83.5°F | 85.9°F |
| Nagasaki | 82.8°F | 83.9°F |
| Osaka | 81.6°F | 82.5°F |
| Kobe | 81.6°F | 81.5°F |
| Fukuoka | 81.4°F | 83.2°F |
| Nara | 81.2°F | 82.6°F |
| Nagoya | 80.0°F | 82.2°F |
| Hiroshima | 80.0°F | 81.4°F |
| Kyoto | 79.8°F | 82.6°F |
| Tokyo | 79.4°F | 81.6°F |
| Yokohama | 79.1°F | 80.9°F |
| Kamakura | 78.7°F | 79.6°F |
| Hakone | 78.6°F | 79.4°F |
| Atami | 78.6°F | 79.7°F |
| Sapporo | 71.6°F | 73.2°F |
| Noboribetsu | 69.0°F | 71.1°F |
Best time for vacation in Atami
Atami on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Atami
Local time: 05:05
September 21, monday
0600
70°F
SW
11 mph
11 mph
0900
70°F
SW
14 mph
14 mph
1200
72°F
SW
18 mph
18 mph
1500
72°F
SW
21 mph
21 mph
1800
73°F
SW
22 mph
22 mph
2100
72°F
S
19 mph
19 mph
September 22, tuesday
0000
75°F
E
7 mph
7 mph
0300
75°F
E
5 mph
5 mph
