Current Sea Water Temperature:
+81.6°F
| Maximum Sea Water Temperature in July: | 83.8°F |
| Minimum Sea Water Temperature in July: | 80.4°F |
| Average water temperature in July: | 81.8°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 15 | 81.6°F | July 10 | 81.0°F |
| July 14 | 81.0°F | July 09 | 81.2°F |
| July 13 | 80.8°F | July 08 | 81.6°F |
| July 12 | 81.0°F | July 07 | 81.8°F |
| July 11 | 81.2°F | July 06 | 81.8°F |
When is the Warmest Sea for Oahu?
According to our data for the last three years for Oahu the highest average sea water temperature was in October, September and August.
Average Water Temperature by Month, °F
Sea Water Temperature in October
The average sea surface temperature in October 2025 for Oahu was 83.1°F. The maximum and minimum values were 82.2°F and 83.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Oahu was 83.2°F. The maximum and minimum values were 82.6°F and 84.0°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Oahu was 82.8°F. The maximum and minimum values were 81.8°F and 83.6°F respectively.
USA Resorts:
NAME
F°
| Boston |  |
+94 |
| Chicago | |
+88 |
| Hawaii |  |
+80 |
| Houston |  |
+90 |
| Las Vegas | |
+120 |
| Los Angeles | |
+106 |
| Maui |  |
+76 |
| Miami | |
+100 |
| Myrtle Beach | |
+96 |
| New York | |
+114 |
| San Diego | |
+96 |
| San Francisco | |
+76 |
| Santa Monica | |
+84 |
| Sarasota | |
+102 |
| Tampa | |
+100 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Oahu
Local time: 08:18
15 jul, wednesday
| 0900 |  |
80°F | W 4 mph |
| 1200 | |
86°F | NW 3 mph |
| 1500 |  |
86°F | W 2 mph |
| 1800 | |
80°F | W 3 mph |
| 2100 | |
76°F | W 4 mph |
16 jul, thursday
| 0000 | |
74°F | W 4 mph |
| 0300 | |
74°F | W 6 mph |
| 0600 |  |
74°F | W 5 mph |