May is a popular month to ask about Cheltenham Beach because conditions can shift week to week along this coast. Expect the water near 16.0°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.
Cheltenham Beach sea temperature in May — averages 16.0°C
The sea at Cheltenham Beach in New Zealand averages 16.0°C during May, 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 · May
16.0°C
mild · Fair
Live water now
…
Recommended wetsuit
3/2mm fullsuit
At 16.0°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.
Monthly comparison
Yes, but expect a fresh dip · Cheltenham Beach
Can you swim at Cheltenham Beach in June? — 15.0°C water15.0°CCan you swim at Cheltenham Beach in July? — 14.0°C water14.0°CCan you swim at Cheltenham Beach in August? — 13.0°C water13.0°CCan you swim at Cheltenham Beach in September? — 14.0°C water14.0°CCan you swim at Cheltenham Beach in October? — 15.0°C water15.0°CCan you swim at Cheltenham Beach in November? — 17.0°C water17.0°C
Frequently asked questions
What is the average sea temperature at Cheltenham Beach in May?
Cheltenham Beach averages 16.0°C in May, based on long-run climatology for the Tasman Sea.
Is the sea warm enough to swim at Cheltenham Beach in May?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Cheltenham Beach in May?
A 2 mm shorty is comfortable for sessions over 30 minutes.