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Port Phillip Bay Sea Temperature in December

Victoria, Australia

November Port Phillip Bay year-round → January

Average sea temperature for Port Phillip Bay, Australia across December, based on 10 years of daily readings.

Average

19.43° C

High

21.79° C

Low

16.9° C

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

December is the 4th warmest of 12 months at Port Phillip Bay. On average the water sits 3.1° than the year-round mean of 16.33° C.

Compared to November, December is 2.3° warmer than (17.09° C in November). By January the water is usually 21.48° C.

Port Phillip Bay Day-by-Day Water Temperature in December

10-year low, average and high

16.0° C
17.8° C
19.5° C
21.3° C
23.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through December. Range Average

Each vertical bar above is one day of December. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Port Phillip Bay.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

December Water Temperature Table for Port Phillip Bay

10-year daily averages

Day Average Low High
December 1 18.55° C 17.15° C 20.97° C
December 2 18.48° C 17.27° C 20.51° C
December 3 18.51° C 17.24° C 20.5° C
December 4 18.75° C 17.26° C 20.76° C
December 5 18.87° C 17.39° C 21.33° C
December 6 18.89° C 17.21° C 21.36° C
December 7 18.82° C 17.15° C 21.13° C
December 8 18.75° C 17.33° C 20.9° C
December 9 18.75° C 17.64° C 20.83° C
December 10 18.88° C 17.68° C 20.82° C
December 11 19° C 17.52° C 20.97° C
December 12 19.11° C 17.36° C 20.99° C
December 13 19.23° C 17.4° C 20.96° C
December 14 19.27° C 17.02° C 21.18° C
December 15 19.33° C 16.9° C 21.71° C
December 16 19.35° C 16.93° C 21.79° C
December 17 19.52° C 17.05° C 21.54° C
December 18 19.61° C 17.26° C 21.53° C
December 19 19.67° C 17.6° C 21.69° C
December 20 19.66° C 17.73° C 21.67° C
December 21 19.6° C 17.9° C 21.31° C
December 22 19.66° C 18.35° C 21.3° C
December 23 19.77° C 18.55° C 21.41° C
December 24 20° C 18.54° C 21.19° C
December 25 20.09° C 18.33° C 21.54° C
December 26 20.1° C 18.22° C 21.44° C
December 27 20.25° C 18.43° C 21.66° C
December 28 20.36° C 18.87° C 21.28° C
December 29 20.39° C 19.18° C 21.31° C
December 30 20.43° C 18.93° C 21.46° C
December 31 20.54° C 18.59° C 21.59° C

Where December Sits in the Year

December highlighted

8.0° C
12.5° C
17.0° C
21.5° C
26.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
21.48° C
21.5° C
20.61° C
18.13° C
15.46° C
12.83° C
11.2° C
11.16° C
12.37° C
14.76° C
17.09° C
19.43° C
10-year monthly history for Port Phillip Bay. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in December

Compare other Australia water for the same month

Port Phillip Bay Location

-38.1732, 144.8731

-38.17321, 144.87312 View on OpenStreetMap →

Port Phillip Bay sits at -38.1732°N, 144.8731°E, on the coast of Victoria, Australia. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Port Phillip Bay