Avalon — Water Temperature, Sea Conditions & Trends

Water Temperature: Daily Trends, Historical Records, and Forecast

⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart Over the Last 30 Days

Water temperature in Avalon has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.

According to our forecast, Water temperature in Avalon will be 18.9°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Avalon is the largest town on Santa Catalina Island off the coast of Southern California, set around a naturally sheltered bay that moderates ocean conditions. Sea surface temperatures around Avalon show a clear seasonal pattern: in winter (December–February) the water typically runs about 12–15 °C, spring months (March–May) commonly range from 13–16 °C, while summer (June–August) brings the warmest conditions around 18–21 °C. Autumn (September–November) temperatures usually fall back to roughly 16–19 °C. Local variations occur with coastal upwelling and weather patterns, so short-term changes of a few degrees are normal; overall the annual range is approximately 12–21 °C.