1 guide, each rated 1 to 5 with the reason — and two lists per place, where you are comfortable and where to pay attention. Nowhere is called dangerous; the specific thing is what helps.
Old San Juan, Condado and Isla Verde are comfortable for visitors. Some outer neighbourhoods are best avoided. Hurricane season runs June to November and is worth insuring against; power infrastructure remains fragile.
Comfortable: Old San Juan · Condado · Isla Verde · Ocean Park
La Perla — which is a neighbourhood rather than an attraction
Santurce — late at night away from La Placita
Rip currents at Condado, which is the most drowning-prone beach on the island
The ratings are this site's own, from the guides' authors and the corrections readers send in; they are not an index. Read the general advice in travel safety tips.