Beach
Traeth Rhosneigr
United Kingdom · sea 15.2 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 13 km offshore, at the nearest open water cell of a 0.25° grid.
About
Traeth ar arfordir Ynys Mon, Cymru, yw traeth Rhosneigr. Fe'i lleolir yn Rhosneigr. Mae mynediad ar hyd ramp tarmac ar gyfer cadeiriau olwyn a phramiau.
Questions
How warm is the sea at Traeth Rhosneigr?
The sea off Traeth Rhosneigr averages 15.2 °C at its warmest, in August, and 8.1 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Traeth Rhosneigr?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Traeth Rhosneigr?
Traeth Rhosneigr is on the coast of United Kingdom, at 53.2275, -4.5235. The map on this site flies straight to it.
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