World Resorts USA Oahu Weather

Oahu sea water temperature

Current sea water temperature:
+77.9°F
Minimum sea water temperature in June: 79.3°F
Maximum sea water temperature in June: 75.6°F
Average sea water temperature in June: 77.8°F

Sea water temperature for the last 10 days:

June 25 77.9°F June 20 77.4°F
June 24 77.9°F June 19 77.2°F
June 23 78.3°F June 18 77.4°F
June 22 77.9°F June 17 77.5°F
June 21 77.7°F June 16 77.9°F

When is the warmest sea in Oahu?

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

Monthly Sea Temperatures in Oahu, °F

Sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 79.8°F. The highest and lowest sea temperatures during the month were 80.2°F and 79.0°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 79.8°F. The highest and lowest sea temperatures during the month were 80.6°F and 79.3°F.

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 79.5°F. The highest and lowest sea temperatures during the month were 80.2°F and 78.6°F.

Best time for vacation in Oahu

Sunniest months:
January 8 days
September 6 days
August 6 days
Warmest months:
September 82.3 °F
August 82.2 °F
July 81.2 °F
Warmest sea temp:
October 80.2 °F
September 80.1 °F
August 79.5 °F
Coldest months:
February 74.8 °F
March 75.7 °F
January 76.0 °F
Rainiest months:
March 1 day
April 1 day
December 1 day
Windiest months:
July 13.0 mph
June 11.7 mph
May 11.6 mph

Oahu on a weather map

Oahu
+73°F
W 11 mph
Feels like: +77°F
Precip.: 20%
Places in USA:
Name
°F
+64°F
+77°F
+86°F
+61°F
+77°F
+84°F
+72°F
+73°F
+68°F
+63°F
+54°F
+77°F
+77°F
+79°F
+66°F
24 Hours Forecast
Oahu
Local time: 21:08
June 26, friday
0000
73°F
W
9 mph
0300
73°F
W
9 mph
0600
73°F
W
10 mph
0900
75°F
W
11 mph
1200
77°F
W
11 mph
1500
77°F
W
14 mph
1800
75°F
W
14 mph
2100
73°F
W
12 mph
Units of measurement: °C / °F