Newport Beach — 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 Newport Beach 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 Newport Beach will be 18.5°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

Newport Beach on California’s Orange County coast experiences mild but noticeably cool ocean temperatures year-round due to the Pacific and the California Current. Typical seawater readings range from about 13–15 °C in winter (December–February), warming to roughly 14–17 °C in spring. Summer months generally bring the warmest surface waters, often between 18–22 °C (June–September), while autumn sees a gradual cooling to around 16–20 °C. Local conditions such as upwelling, offshore winds and occasional El Niño or La Niña events can push temperatures a few degrees cooler or warmer than these averages, and sheltered areas like the harbor tend to be slightly warmer than the open ocean.