There are some tips in the productivity post from Stephen Wolfram who sometimes walks outside while working: https://writings.stephenwolfram.com/2019/02/seeking-the-prod...

From my personal experience, it's usually a bit annoying. Macbooks have displays bright enough to work outside, but then you're burning through the battery quite quickly. When near beaches, grains of sand can get anywhere. When sitting in the shade of trees, little droplets of something sticky fall down. Insect everywhere...