The highest day temperature in April 2025 was 77°F. The lowest night temperature was 53°F. The average values for day and night temperatures during April were 61.6°F и 57.3°F respectivly.

The average sea surface temperature in April 2025 for Santa Catalina Island was 60.4°F. The maximum and minimum values were 57.4°F and 62.2°F respectively.

Most of the days in April are sunny but you can also expect cloudy and gloomy days.

Precipitation total in April for Santa Catalina Island is 0.2 in.

The average wind speed in April is 7.5 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Santa Catalina Island in April is 9.5 hours.