Carlsbad — 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 Carlsbad 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 Carlsbad 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

Carlsbad, on California’s North County coast, offers a temperate marine climate with Pacific Ocean water that stays relatively cool year-round because of the California Current. Typical sea surface temperatures range from about 12–15 °C in the coldest months (December–February), slowly rising through spring to roughly 13–17 °C. By summer, ocean temperatures generally sit between 17–21 °C, with the warmest conditions often arriving in late summer and early autumn when readings can reach 20–22 °C during mild, warm years. Local conditions vary with tides, weather patterns and seasonal upwelling, so actual temperatures on any given day can differ from long-term averages.