Naples — Water Temperature in January

Water Temperature Range

15°C

minimum

19°C

average

22°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

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	2026	2025	2024	2023
JAN 1	22°C	21°C	23°C	22°C
JAN 2	20°C	21°C	21°C	21°C
JAN 3	20°C	21°C	20°C	21°C
JAN 4	20°C	20°C	20°C	21°C
JAN 5	19°C	20°C	20°C	21°C
JAN 6	19°C	20°C	21°C	20°C
JAN 7	19°C	18°C	20°C	20°C
JAN 8	20°C	18°C	20°C	20°C
JAN 9	20°C	18°C	19°C	20°C
JAN 10	20°C	18°C	20°C	19°C
JAN 11	21°C	18°C	19°C	19°C
JAN 12	20°C	18°C	19°C	19°C
JAN 13	21°C	18°C	20°C	19°C
JAN 14	22°C	18°C	19°C	19°C
JAN 15	22°C	17°C	19°C	18°C
JAN 16	21°C	18°C	19°C	18°C
JAN 17	21°C	18°C	18°C	18°C
JAN 18	20°C	18°C	19°C	18°C
JAN 19	21°C	18°C	19°C	17°C
JAN 20	21°C	19°C	18°C	17°C
JAN 21	20°C	19°C	19°C	17°C
JAN 22	19°C	19°C	19°C	17°C
JAN 23	19°C	18°C	19°C	16°C
JAN 24	18°C	18°C	19°C	16°C
JAN 25	19°C	18°C	19°C	16°C
JAN 26	20°C	17°C	20°C	16°C
JAN 27	20°C	18°C	20°C	16°C
JAN 28	19°C	17°C	21°C	15°C
JAN 29	19°C	16°C	21°C	15°C
JAN 30	18°C	17°C	20°C	15°C
JAN 31	18°C	17°C	20°C	15°C

January: Climate and Swimming Opportunities

Average Night Air Temperature

12°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

45 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

14 km/h

Average Humidity

75%

At such water and air temperatures, swimming feels cool and invigorating. It’s comfortable for a quick dip, and you’ll feel fine as long as you warm up soon after.