Port Melbourne — Water Temperature in December

Water Temperature Range

15°C

minimum

18°C

average

21°C

maximum

Water Temperature Chart for December

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

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

Climate and Swimming Opportunities in Port Melbourne in December

Average Day Air Temperature

22°C

Average Night Air Temperature

13°C

Precipitation Amount per Month

60 mm

Number of Rainy Days

Daylight per Day

15 hrs

Sunshine per Day

8 hrs

Average Wind Speed

21 km/h

Average Humidity

53%

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.