Best time of year to visit
March through early June. Water clarity peaks, the sargassum is manageable, and trade winds keep the bugs down. The bioluminescent bay on Vieques is brightest on moonless nights year-round, but it glows hardest in dry-season clear water.
When the crowds thin out
Almost always — these islands are quiet by Caribbean standards. Weekday visits in May and September feel like you have the beach to yourself. Avoid weekends in peak winter when San Juan residents take the ferry over.
What you'll eat and drink
Casual is the rule. Fresh-caught fish tacos, conch ceviche, empanadillas, and rum drinks served in plastic cups at beach shacks. On Vieques, the food trucks and open-air spots around Esperanza are a destination in themselves. On Culebra, eat where the boats unload — usually the same day's catch on the menu.
The vibe
Wild horses on Vieques actually walk down the road in front of you. Culebra's Flamenco Beach is regularly ranked among the most beautiful in the world — and a 20-minute walk over the hill gets you to Tamarindo, where you can swim with sea turtles. There's almost no nightlife, no big resorts, no chain restaurants. You go to swim, snorkel, eat, sleep and do it again.
Who it's best for
Couples who want quiet, repeat Caribbean travelers who've burned out on big resorts, snorkelers, and anyone who'd consider a glowing-blue kayak tour the highlight of a trip.