Kauai Sea Temperature
USA · Updated hourly from satellite and marine data
Current Sea Temperature
25.8°C
Comfortable for snorkeling
Sea Surface Temperature Over the Year
Sea surface temperature in Kauai ranges from about 25.7°C in June to 25.8°C in July. The water is warmest in late summer and coolest in winter.
Over the past 30 days, the average sea temperature in Kauai has been 25.7°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| Jun | — | — | — |
| Jul | 25.5°C | 25.7°C | 25.9°C |
Based on recent forecast data collected for Kauai.
Kauai Water Temperature — Common Questions
What is the sea temperature in Kauai today?
The current sea surface temperature in Kauai is 25.8°C. Over the last 30 days, the average has been 25.7°C.
When is the water warmest in Kauai?
The warmest sea temperatures in Kauai occur in July, averaging around 25.8°C. Late summer typically brings the warmest water, ideal for snorkeling without a wetsuit.
When is the water coldest in Kauai?
The coldest sea temperatures are in June, averaging around 25.7°C.
Can you swim in Kauai today?
Yes — at 25.8°C the water is warm enough for comfortable swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Kauai.
View Snorkel Forecast →