Scuba diving in San Juan means easy shore access rather than boat trips. You'll typically gear up on a small beach, wade in, and explore rocky reefs, small wrecks, and schools of tropical fish within a 10-minute swim from shore. Visibility is usually 30-60 feet depending on swell and rain. It's relaxed Caribbean diving—warm water (78-82°F), gentle currents most days, and sites suitable for beginners to intermediate divers. Don't expect massive walls or huge pelagics; it's more about colorful corals, morays, lobsters, and the occasional turtle. A two-tank morning usually wraps up by early afternoon, leaving time to explore the city.
The best time is December through April when seas are calmer and rainfall is lower. Summer and fall bring warmer water but higher chance of swells, runoff, and occasional tropical storms that can cancel trips. Expect to pay around $120-180 for a two-tank dive including gear and guide; discover scuba or intro courses run $180-250. Snorkeling the same sites is about half the price if you're not certified.
Pick a morning trip to avoid afternoon wind and chop. Skip trying to combine diving with a full day of Old San Juan sightseeing— you'll be tired and salty. If you're new to diving, the beach entry can feel awkward with waves; go with a patient guide and rent reef shoes. Bring your own mask if you have one that fits well.
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