July is a popular month to ask about Porthcurno 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 Celtic Sea.
Porthcurno sea temperature in July — averages 16.0°C
The sea at Porthcurno in United Kingdom averages 16.0°C during July, based on long-run climatology for the Celtic 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 · July
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 · Porthcurno
Can you swim at Porthcurno in June? — 14.0°C water14.0°CCan you swim at Porthcurno in July? — 16.0°C water16.0°CCan you swim at Porthcurno in August? — 17.0°C water17.0°CCan you swim at Porthcurno in September? — 16.0°C water16.0°CCan you swim at Porthcurno in October? — 14.0°C water14.0°CCan you swim at Porthcurno in November? — 12.0°C water12.0°C
Frequently asked questions
What is the average sea temperature at Porthcurno in July?
Porthcurno averages 16.0°C in July, based on long-run climatology for the Celtic Sea.
Is the sea warm enough to swim at Porthcurno in July?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Porthcurno in July?
A 2 mm shorty is comfortable for sessions over 30 minutes.