Caribbean - How long for a visit to St. John?

I'm in the planning stages. Just curious to see what people thought. Can one do it in a day? 1/2 day?

Thanks!

Without any information on what you want from "doing" St. John, your question is hard to answer.

You can take a taxi tour of the island in 1/2 day. With a full day, you also would have time to get out of the taxi and, for example, enjoy one of the many beautiful beaches.

On the other hand, one easily could spend a week -- or a month -- exploring the island's beaches, reefs, hiking trails and historic sites; enjoying its unspoiled natural beauty and taking advantage of its watersports opportunities.

I think just to get a general overview of the island, visit that sugar plantation, and check out a beach or two. It looks amazing, but would require more time to really just R&R and explore the beaches, reefs, etc.

You could do that in a very full day, but I'd split it up into a day and a half so you can enjoy yourself

2 days and you should see everything. From Cruz Bay, all the way to the SE part of the island at the "Rams Head". Lots of beaches to see and lounge at, and they all have different features to explore and enjoy.

If you snorkel, there are very nice snorkeling beaches all over the island. You can get as crowded or as remote as you want.

One thing that I really want to do next time I'm on St. John is to rent a dinghy and visit a few beaches that you can only get to via the water.

Thanks for the thoughts everyone - on St. John and San Juan, PR.