Hacker News Reader

I use an Apple Watch series 3 near the coast in Ecuador (30 degrees celsius year round).

Battery has been fine for me. I wear it at night for sleep tracking, and charge it when I shower. Even on days when I shower once, I usually manage to get through the day without issue.

As an unrelated anecdote, I have an e-book reader and its battery lasted the longest when I went to a place with 30+ temperatures.

It lasted for two weeks and a half reading about 4 hours a day.

Not sure. It rarely breaks 30 here (Bay Area) and when it does I stay inside mostly. :)