World Resorts Japan Osaka Weather

Osaka sea water temperature

Current sea water temperature:
+53.8°F
Minimum sea water temperature in January: 60.4°F
Maximum sea water temperature in January: 48.0°F
Average sea water temperature in January: 55.1°F

Sea water temperature for the last 10 days:

January 12 53.8°F January 7 57.0°F
January 11 53.8°F January 6 56.8°F
January 10 54.0°F January 5 56.5°F
January 9 54.7°F January 4 56.3°F
January 8 54.1°F January 3 56.1°F

When is the warmest sea in Osaka?

Based on the data about daily sea water temperature for the last three years the warmest sea in Osaka was noticed in August, September and July.

Monthly Sea Temperatures in Osaka, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 85.5°F. The highest and lowest sea temperatures during the month were 86.9°F and 83.1°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 82.5°F. The highest and lowest sea temperatures during the month were 87.1°F and 75.6°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 84.0°F. The highest and lowest sea temperatures during the month were 86.2°F and 79.5°F.

Best time for vacation in Osaka

Sunniest months:
May 16 days
August 16 days
October 15 days
Warmest months:
August 91.8 °F
July 88.5 °F
September 84.6 °F
Warmest sea temp:
August 82.6 °F
September 79.5 °F
July 79.3 °F
Coldest months:
January 46.7 °F
February 48.5 °F
December 50.9 °F
Rainiest months:
June 7 days
July 7 days
September 5 days
Windiest months:
February 7.4 mph
December 7.4 mph
January 7.3 mph

Osaka on a weather map

Osaka
+48°F
NE 9 mph
Feels like: +43°F
Precip.: 0%
Places in Japan:
Name
°F
+48°F
+50°F
+52°F
+41°F
+55°F
+39°F
+45°F
+32°F
+63°F
+48°F
+25°F
+45°F
+50°F
+48°F
+46°F
24 Hours Forecast
Osaka
Local time: 07:50
January 13, tuesday
0900
48°F
NE
9 mph
1200
52°F
NE
17 mph
1500
54°F
E
15 mph
1800
50°F
E
14 mph
2100
45°F
E
9 mph
January 14, wednesday
0000
43°F
E
12 mph
0300
39°F
E
12 mph
0600
39°F
E
11 mph
Units of measurement: °C / °F