Water temperature in Sydney (NSW) in December

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Is it warm enough to swim in Sydney in December? Average water temperature in Sydney in December is 22.4°C and therefore suitable for comfortable swimming. The warmest sea in Sydney in December is 25.8°C, and the coldest is 19.5°C. Average high air temperature in Sydney in December is 25°C, and average low temperature is 18°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Sydney

Changes water temperature in Sydney in December 2024, 2023

To get an accurate forecast for the water temperature in Sydney for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Sydney, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of December.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2024	2023	Min	Max
1 December	21.9°C	22.4°C	19.5°C	23°C
2 December	21.7°C	22.5°C	19.7°C	23.1°C
3 December	21.6°C	22.9°C	20.2°C	23.4°C
4 December	21.6°C	23.1°C	20.4°C	23.3°C
5 December	22.3°C	23.1°C	20.3°C	23.4°C
6 December	22.6°C	22.8°C	20.3°C	23.1°C
7 December	22.5°C	22.6°C	20.3°C	23.1°C
8 December	22.5°C	23.6°C	20.2°C	23.6°C
9 December	22.2°C	23.6°C	20.5°C	23.6°C
10 December	21.9°C	23.8°C	20.6°C	23.8°C
11 December	22.5°C	24.1°C	20.8°C	24.1°C
12 December	22.7°C	23.8°C	20.1°C	23.8°C
13 December	22.7°C	24.3°C	20°C	24.3°C
14 December	23.2°C	24.1°C	20.2°C	24.1°C
15 December	23.8°C	24.3°C	20.2°C	24.3°C

Day	2024	2023	Min	Max
16 December	23.7°C	23.9°C	21°C	23.9°C
17 December	23.5°C	23.6°C	20.6°C	23.6°C
18 December	22.5°C	24.3°C	20.8°C	24.8°C
19 December	22.7°C	24.5°C	20.6°C	25°C
20 December	22.5°C	23.9°C	20.3°C	25.2°C
21 December	22.7°C	23.4°C	20.4°C	25.1°C
22 December	22.7°C	23.7°C	20.6°C	25.3°C
23 December	22.4°C	24.5°C	20.5°C	25.7°C
24 December	22.5°C	24.2°C	20.8°C	25.8°C
25 December	22.5°C	24.2°C	21.6°C	25.3°C
26 December	22.9°C	24°C	21.3°C	25.3°C
27 December	22.4°C	24.7°C	21.7°C	24.9°C
28 December	22.7°C	25°C	21.8°C	25°C
29 December	22.9°C	24.8°C	21.4°C	24.8°C
30 December	23°C	25°C	21.3°C	25°C
31 December	23.1°C	24.7°C	21.3°C	24.7°C

Average water temperature in Sydney in December over a decade

2015	2016	2017	2018	2019
22.5°C	22.9°C	22.2°C	21.8°C	22.5°C

2020	2021	2022	2023	2024
22.4°C	23.5°C	21°C	23.8°C	22.6°C

Sydney sea state in December

Chart comparing the height of waves in Sydney in December over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Weather and climate in Sydney in December

This data display average monthly climate indicators in Sydney in December based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature25°C
Average LOW temperature18°C
Average humidity
59
Average rainfall days12 days
Average rainfall3.1''/79mm
Average daylight14h
Average sunshine7.9h
Average UV index12

Sydney water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in December. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Dover Heights	21.3°C	19.2°C	24.6°C
Manly	21.3°C	19.2°C	24.4°C
Dee Why	21.2°C	19.3°C	24.3°C
Narrabeen	21.2°C	19.3°C	24.2°C
Collaroy	21.2°C	19.3°C	24.2°C
Bensville	21.3°C	19.3°C	24.3°C
Newport	21.3°C	19.4°C	24.2°C
Mona Vale	21.3°C	19.4°C	24.2°C
Warriewood	21.3°C	19.4°C	24.2°C
Mosman	21.3°C	19.2°C	24.2°C

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Our report for Sydney is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature