New Orleans — Water Temperature in December

Water Temperature Range

11°C

minimum

15°C

average

19°C

maximum

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Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2025	2024	2023	2022
DEC 1	17°C	18°C	19°C	16°C
DEC 2	17°C	17°C	18°C	16°C
DEC 3	17°C	17°C	17°C	16°C
DEC 4	16°C	17°C	17°C	15°C
DEC 5	16°C	17°C	16°C	15°C
DEC 6	16°C	17°C	16°C	16°C
DEC 7	16°C	16°C	16°C	15°C
DEC 8	16°C	16°C	15°C	15°C
DEC 9	15°C	16°C	14°C	15°C
DEC 10	16°C	16°C	15°C	15°C
DEC 11	16°C	15°C	15°C	15°C
DEC 12	15°C	15°C	14°C	15°C
DEC 13	15°C	14°C	14°C	15°C
DEC 14	16°C	15°C	14°C	15°C
DEC 15	15°C	14°C	14°C	14°C
DEC 16	15°C	15°C	14°C	14°C
DEC 17	15°C	13°C	14°C	13°C
DEC 18	15°C	13°C	14°C	14°C
DEC 19	14°C	13°C	14°C	13°C
DEC 20	14°C	13°C	14°C	13°C
DEC 21	14°C	13°C	15°C	13°C
DEC 22	15°C	14°C	15°C	13°C
DEC 23	14°C	14°C	14°C	13°C
DEC 24	14°C	14°C	14°C	13°C
DEC 25	14°C	14°C	14°C	13°C
DEC 26	14°C	14°C	14°C	14°C
DEC 27	14°C	14°C	14°C	13°C
DEC 28	14°C	15°C	14°C	14°C
DEC 29	14°C	16°C	13°C	14°C
DEC 30	14°C	14°C	14°C	14°C
DEC 31	14°C	15°C	14°C	13°C

December: Climate and Swimming Opportunities

Average Night Air Temperature

-15°C

Average Day Air Temperature

-3°C

Precipitation Amount per Month

54 mm

Number of Rainy Days

Daylight per Day

9 hrs

Sunshine per Day

4 hrs

Average Wind Speed

10 km/h

Average Humidity

69%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.