Can you swim at Duncannon Beach in September? — 15.0°C water
Cool — short dips or a shorty wetsuit
Average sea · September
15.0°C
Live water now
…
Recommended wetsuit
4/3mm fullsuit
mild
Cool. 15.0°C in September means short dips for most people. A 2 mm shorty or 3/2 mm wetsuit transforms the experience.
Monthly averages set expectations, but the specific beach today depends on wind, swell and recent weather. Check the live value at the top of this page or open the Duncannon Beach live page for full conditions.
Frequently asked questions
What is the average sea temperature at Duncannon Beach in September?
Duncannon Beach averages 15.0°C in September, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Duncannon Beach in September?
Not without thermal protection — a wetsuit is recommended at 15.0°C.
Do I need a wetsuit at Duncannon Beach in September?
