Catalina Island Sea Temperature
USA · Updated hourly from satellite and marine data
Current Sea Temperature
20.1°C
Cool — wetsuit recommended
Sea Surface Temperature Over the Year
Sea surface temperature in Catalina Island ranges from about 20.2°C in June to 20.2°C in June. The water is warmest in late summer and coolest in winter.
Over the past 30 days, the average sea temperature in Catalina Island has been 20.2°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| Jun | — | — | — |
Based on recent forecast data collected for Catalina Island.
Catalina Island Water Temperature — Common Questions
What is the sea temperature in Catalina Island today?
The current sea surface temperature in Catalina Island is 20.1°C. Over the last 30 days, the average has been 20.2°C.
When is the water warmest in Catalina Island?
The warmest sea temperatures in Catalina Island occur in June, averaging around 20.2°C. Late summer typically brings the warmest water, ideal for snorkeling without a wetsuit.
When is the water coldest in Catalina Island?
The coldest sea temperatures are in June, averaging around 20.2°C.
Can you swim in Catalina Island today?
Yes — at 20.1°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 Catalina Island.
View Snorkel Forecast →