F1 2017
50 Achievements
1,000
120-150h
Slippery when wet
Set wet times in Time Trial at 5 circuits
20
1.55%
How to unlock the Slippery when wet achievement in F1 2017 - Definitive Guide
So, the fastest tracks for this achievement are:
Japan Short
Bahrain Short
Britain Short
Austria
Brazil
USA Short took me about 1.30min to drive around in wet conditions.
From the Main Menu, select Time Trial and go on to set valid lap times on 5 different circuits with the weather settings set to 'Wet'. Any of the circuits count so you can use the short version of Great Britain, USA and Bahrain as well to save yourself some time. For a valid lap you're not allowed to leave the track or collide with a wall. After you have completed a valid lap you can just quit out via the options menu and it will automatically save.
To save yourself some time, do this trophy in conjunction with the Time waits for no one trophy. Drive the 5 lap times on a wet track first, because these will count towards that trophy.