Long Rest is a mechanic in Baldur's Gate 3. Long Rest can be used when out of combat to recover all the HP and all used Spells and Actions. Using Long Rest will take you back to the Camp and the day will be over.
Long Rest in Baldur's Gate 3
Using a Long Rest is the best way to recover HP and Spells to continue with your adventures and engage in new fights.
After using Long Rest, the Short Rest will be restored. You can only use 1 Short Rest before using a Long Rest.
When using a Long Rest, the Character's will come back to the Camp and the day will be complete.
How to use Long Rest
In order to take a Long Rest press on the Long Rest Icon located on the top right part of the screen, on the right part of the Mini-Map. Characters will come back to the Camp and you can interact with the Bedrolls to finish the current day.