I'm sure there's quite a few traditional board games that have online or app version, like risk for example. Iirc there's also Scrabble, scythe, Catan, and I'm sure others. I can't speak to the quality of the apps but I would recommend just searching for any games you'd be interested in playing and seeing if there's a version on the app store.
In general, measurements like that of ocean temperature are sea surface temperature. However, the ocean mixed layer (can vary between 10-100 metres) can be typically uniform in temperature and salinity