Portofino itself is not part of the Cinque Terre; the two are separate stretches of the Ligurian coast about an hour apart by car, which is exactly why this tour exists as its own full-day trip rather than an add-on to a Portofino visit.
The Cinque Terre, Italian for Five Lands, is a cluster of five villages tucked into inlets and perched on cliffs along roughly 10 miles of coastline: Monterosso al Mare, Vernazza, Corniglia, Manarola, and Riomaggiore. Along with nearby Portovenere, the area was named a UNESCO World Heritage Site in 1997 for its combination of dramatic coastal scenery and centuries of terraced farming; locals still tend vineyards and olive groves on slopes held up by dry stone walls that would stretch thousands of miles if laid end to end. Until the last century these villages were reachable only by boat or footpath, which is part of why they still feel so distinct from one another.
Your guide meets you at the pier in Portofino and drives you to Santa Margherita Ligure, where you board a local train to Manarola. In Manarola you walk the tiny fisherman's wharf and the village's steep, colorful lanes before continuing by boat (weather permitting) or train to Vernazza, the most photographed of the five villages, where you have free time to explore the shops and harbor and have lunch on your own (meal not included).
In the afternoon you continue to Monterosso al Mare, the largest of the five villages and the only one with a real sandy beach. After a short walk you have free time to explore on your own; sampling the local lemon liqueur, sciacchetra dessert wine, or a wine tasting room are all popular ways to spend the time. From Monterosso you take the train back to Santa Margherita or Levanto, where your driver meets you for the final leg back to Portofino.
This tour includes the Cinque Terre Card, which covers park and footpath entrance fees along the route.