@winke
Outside of an activity you can’t use the Suunto Plus features.
But what you can do anytime like “Safe”: Go to navigation -> your position -> save it as a POI in the watch. Then you can pick it later for getting directions, altitude difference and distance to this point.
Regarding “Weather”: There is always the baro trend available plus temperature. Many watch faces show sunrise und sunset times as well as the oxygen partial pressure at heights above 2000m(?).
What else would you need from those S+ screens out of activity?