Hi,
This is my first HA integration and wanted to share it with everyone, maybe specially those living in Norway and likes to go for a swim 
This is an integration to get water temperatures from the “YR bade temperatur” service. This is a web site everyone can register local water temperatures to and this integration will get up to date temperatures into home assistant 
Before using the integration you need an api key, go to this page to find more details
API information
They usually provide this very quickly 
This is the repo of the i tegration
YR water temperatures integration
You can install it manually from the repo, or through HACS (which is probably the easiest way)
If you have any issues, feature requests or any questions, let me know and I will do my best to follow up!