Current Sea Water Temperature:
+81.2°F
| Maximum Sea Water Temperature in December: | 82.8°F |
| Minimum Sea Water Temperature in December: | 78.2°F |
| Average water temperature in December: | 80.7°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 15 | 81.2°F | December 10 | 81.6°F |
| December 14 | 81.4°F | December 09 | 81.6°F |
| December 13 | 81.4°F | December 08 | 81.8°F |
| December 12 | 81.6°F | December 07 | 82.0°F |
| December 11 | 81.6°F | December 06 | 82.2°F |
When is the Warmest Sea for Kauai?
According to our data for the last three years for Kauai the highest average sea water temperature was in September, October and August.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Kauai was 85.0°F. The maximum and minimum values were 84.6°F and 85.4°F respectively.
Sea Water Temperature in October
The average sea surface temperature in October 2025 for Kauai was 84.8°F. The maximum and minimum values were 83.8°F and 85.4°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Kauai was 82.3°F. The maximum and minimum values were 79.0°F and 84.8°F respectively.
USA Resorts:
NAME
F°
| Chicago |  |
-2 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston |  |
+34 |
| Las Vegas | |
+50 |
| Los Angeles |  |
+54 |
| Maui | |
+72 |
| Miami | |
+70 |
| Miami Beach | |
+74 |
| New York | |
+12 |
| San Diego | |
+54 |
| San Francisco | |
+44 |
| Sarasota | |
+58 |
| Tampa | |
+54 |
| Washington | |
+12 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Kauai
Local time: 22:01
15 dec, monday
| 0000 |  |
74°F | N 3 mph |
| 0300 |  |
74°F | E 4 mph |
| 0600 | |
74°F | NW 3 mph |
| 0900 |  |
78°F | N 3 mph |
| 1200 |  |
82°F | NW 2 mph |
| 1500 | |
82°F | E 1 mph |
| 1800 | |
78°F | N 4 mph |
| 2100 | |
76°F | N 6 mph |