August is a popular month to ask about Sandfly Bay because conditions can shift week to week along this coast. Expect the water near 9.0°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.
Sandfly Bay sea temperature in August — averages 9.0°C
The sea at Sandfly Bay in New Zealand averages 9.0°C during August, 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 · August
9.0°C
cold · Poor
Live water now
…
Recommended wetsuit
5/4mm fullsuit + boots & gloves
At 9.0°C you need a 5/4mm fullsuit with boots, gloves and ideally a hood.
Monthly comparison
Cold — wetsuit recommended · Sandfly Bay
Can you swim at Sandfly Bay in June? — 10.0°C water10.0°CCan you swim at Sandfly Bay in July? — 9.0°C water9.0°CCan you swim at Sandfly Bay in August? — 9.0°C water9.0°CCan you swim at Sandfly Bay in September? — 10.0°C water10.0°CCan you swim at Sandfly Bay in October? — 11.0°C water11.0°CCan you swim at Sandfly Bay in November? — 12.0°C water12.0°C
Frequently asked questions
What is the average sea temperature at Sandfly Bay in August?
Sandfly Bay averages 9.0°C in August, based on long-run climatology for the Tasman Sea.
Is the sea warm enough to swim at Sandfly Bay in August?
Not without thermal protection — a wetsuit is recommended at 9.0°C.
Do I need a wetsuit at Sandfly Bay in August?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.