December is a popular month to ask about Narrow Neck because conditions can shift week to week along this coast. Expect the water near 19.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Tasman Sea.
Narrow Neck sea temperature in December — averages 19.0°C
The sea at Narrow Neck in New Zealand averages 19.0°C during December, based on long-run climatology for the Tasman Sea. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · December
19.0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Narrow Neck
Can you swim at Narrow Neck in June? — 15.0°C water15.0°CCan you swim at Narrow Neck in July? — 14.0°C water14.0°CCan you swim at Narrow Neck in August? — 13.0°C water13.0°CCan you swim at Narrow Neck in September? — 14.0°C water14.0°CCan you swim at Narrow Neck in October? — 15.0°C water15.0°CCan you swim at Narrow Neck in November? — 17.0°C water17.0°C
Frequently asked questions
What is the average sea temperature at Narrow Neck in December?
Narrow Neck averages 19.0°C in December, based on long-run climatology for the Tasman Sea.
Is the sea warm enough to swim at Narrow Neck in December?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Narrow Neck in December?
A 2 mm shorty is comfortable for sessions over 30 minutes.