World Resorts USA Santa Catalina Island Weather

Santa Catalina Island sea water temperature

Current sea water temperature:
+61.3°F
Minimum sea water temperature in January: 62.6°F
Maximum sea water temperature in January: 57.2°F
Average sea water temperature in January: 59.4°F

Sea water temperature for the last 10 days:

January 12 61.3°F January 7 61.7°F
January 11 61.7°F January 6 62.2°F
January 10 61.7°F January 5 62.2°F
January 9 62.1°F January 4 62.4°F
January 8 62.2°F January 3 62.6°F

When is the warmest sea in Santa Catalina Island?

Based on the data about daily sea water temperature for the last three years the warmest sea in Santa Catalina Island was noticed in August, September and July.

Monthly Sea Temperatures in Santa Catalina Island, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 69.7°F. The highest and lowest sea temperatures during the month were 71.8°F and 68.2°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 70.6°F. The highest and lowest sea temperatures during the month were 72.0°F and 69.1°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 68.0°F. The highest and lowest sea temperatures during the month were 69.1°F and 65.3°F.

Best time for vacation in Santa Catalina Island

Sunniest months:
August 24 days
July 23 days
September 21 days
Warmest months:
August 75.1 °F
September 74.6 °F
July 73.3 °F
Warmest sea temp:
August 70.5 °F
September 70.4 °F
July 68.6 °F
Coldest months:
March 61.0 °F
December 61.9 °F
January 62.2 °F
Rainiest months:
January 2 days
December 2 days
February 1 day
Windiest months:
March 8.8 mph
April 7.5 mph
February 7.5 mph

Santa Catalina Island on a weather map

Santa Catalina Island
+55°F
SW 7 mph
Feels like: +54°F
Precip.: 0%
Places in USA:
Name
°F
+32°F
+73°F
+73°F
+39°F
+52°F
+68°F
+72°F
+66°F
+32°F
+52°F
+45°F
+52°F
+50°F
+45°F
+27°F
24 Hours Forecast
Santa Catalina Island
Local time: 06:11
January 12, monday
0900
55°F
SW
7 mph
1200
68°F
SW
6 mph
1500
68°F
S
6 mph
1800
66°F
SE
8 mph
2100
64°F
SE
9 mph
January 13, tuesday
0000
61°F
SE
7 mph
0300
59°F
S
6 mph
0600
59°F
SW
6 mph
Units of measurement: °C / °F