Measurements:
°C
°F
CURRENT WEATHER
06:42
Santa Catalina Island
68°F
N 4 mph
Feels like: 68°F
Precip: 21%
World Resorts USA Santa Catalina Island Weather

7 Day Weather Forecast

09.15
tue
DAY
68°F
N 7 mph
precip
10%
NIGHT
66°F
N 4 mph
precip
10%
09.16
wed
DAY
66°F
NE 6 mph
precip
9%
NIGHT
66°F
E 6 mph
precip
9%
09.17
thu
DAY
66°F
E 6 mph
precip
8%
NIGHT
68°F
E 6 mph
precip
8%
09.18
fri
DAY
68°F
E 2 mph
precip
6%
NIGHT
68°F
E 9 mph
precip
9%
09.19
sat
DAY
68°F
N 3 mph
precip
8%
NIGHT
68°F
NE 7 mph
precip
9%
09.20
sun
DAY
68°F
NE 4 mph
precip
11%
NIGHT
68°F
E 5 mph
precip
25%
09.21
mon
DAY
66°F
E 9 mph
precip
15%
NIGHT
68°F
E 7 mph
precip
23%

Santa Catalina Island Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Santa Catalina Island was 23.2°F. The maximum and minimum values were 22.3°F and 24.0°F respectively.

Santa Catalina Island on the Weather Map

Best Time to Visit Santa Catalina Island
The most sunny months:
July 23 days
August 23 days
September 21 days
The most warm months:
August 78.7 °F
September 77.4 °F
July 76.0 °F
Warmest sea temperature:
August 73.3 °F
September 72.6 °F
July 70.8 °F
The most cold months:
December 63.2 °F
January 63.7 °F
March 63.9 °F
The most rainy months:
January 2 days
December 2 days
February 1 day
The most windy months:
March 8 mph
February 7 mph
April 7 mph
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