Water temperature in Cook Strait in December

Is it warm enough to swim in Cook Strait in December? Average water temperature in Cook Strait in December is 15°C and therefore is not suitable for comfortable swimming. The warmest sea in Cook Strait in December is 17.5°C, and the coldest is 12.7°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Cook Strait

Changes water temperature in Cook Strait in December 2024, 2023

To get an accurate forecast for the water temperature in Cook Strait for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Cook Strait, 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	14.3°C	13.4°C	13.4°C	15.9°C
2 December	14.9°C	13.5°C	13.5°C	15.8°C
3 December	14.7°C	13.6°C	13.6°C	15.6°C
4 December	15°C	13.8°C	13.8°C	15.9°C
5 December	15.1°C	13.6°C	13.6°C	15.8°C
6 December	15.2°C	14.4°C	13.9°C	15.6°C
7 December	14.7°C	14.4°C	13.7°C	15.6°C
8 December	15.2°C	15°C	13.7°C	16.1°C
9 December	15.5°C	15°C	13.7°C	16.2°C
10 December	15.1°C	14.1°C	13.9°C	16.3°C
11 December	14.8°C	14.3°C	13.8°C	16.5°C
12 December	15.4°C	14.4°C	13.9°C	16.5°C
13 December	15.2°C	13.4°C	13.4°C	17°C
14 December	15.1°C	14°C	14°C	17°C
15 December	15.9°C	14.1°C	13.9°C	16.8°C

Day	2024	2023	Min	Max
16 December	15.8°C	14.3°C	14°C	17°C
17 December	15°C	13.7°C	13.7°C	16.8°C
18 December	14.8°C	13.8°C	13.8°C	16.9°C
19 December	14.8°C	14.6°C	13.9°C	16.7°C
20 December	14.7°C	15°C	14.1°C	16.4°C
21 December	15°C	15.1°C	14°C	16.6°C
22 December	14.6°C	15.2°C	14°C	16.1°C
23 December	14.5°C	15.3°C	13.9°C	15.9°C
24 December	15.4°C	16.6°C	13.5°C	16.6°C
25 December	15.4°C	16.4°C	13.7°C	16.5°C
26 December	15.4°C	15.9°C	14.3°C	16.4°C
27 December	15°C	15.7°C	14.3°C	16.7°C
28 December	14.7°C	15.2°C	14.1°C	17.5°C
29 December	14.5°C	15.8°C	12.7°C	16.9°C
30 December	14.7°C	16.1°C	13°C	16.9°C
31 December	14.9°C	16.2°C	13.3°C	16.7°C

Cook Strait water temp chart in December

Average water temperature in Cook Strait in December over a decade

2015	2016	2017	2018	2019
14.4°C	14.8°C	15.9°C	15.5°C	14.9°C

2020	2021	2022	2023	2024
14.7°C	16°C	15.8°C	14.7°C	15°C

Cook Strait sea state in December

Chart comparing the height of waves in Cook Strait 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.

Cook Strait 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
Marlborough Sounds	15.9°C	14°C	18.4°C
Lyall Bay	15.3°C	13.3°C	17.9°C
Houghton Bay	15.3°C	13.3°C	17.9°C
Island Bay	15.3°C	13.3°C	17.9°C
Princess Bay	15.3°C	13.3°C	17.9°C
Oriental Bay	15.8°C	13.9°C	18.5°C
Hataitai	15.8°C	13.9°C	18.5°C
Evans Bay	15.8°C	13.9°C	18.5°C
Breaker Bay	15.6°C	13.7°C	18.2°C
Seatoun	15.6°C	13.7°C	18.2°C

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Our report for Cook Strait 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.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature