Beach
Nordstrand bad
Oslo Municipality, Norway · sea 18.4 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 56 km offshore, at the nearest open water cell of a 0.25° grid.
About
Nordstrand bad i Oslo ble bygget omkring 1890. Badet skulle blant annet brukes av pasientene på sanatoriet Fageraas, men det ble også bygget en restaurant i forbindelse med badet.
Questions
How warm is the sea at Nordstrand bad?
The sea off Nordstrand bad averages 18.4 °C at its warmest, in August, and 2.7 °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 Nordstrand bad?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Nordstrand bad?
Nordstrand bad is on the coast of Oslo Municipality, Norway, at 59.8683, 10.7825. The map on this site flies straight to it.