Most boat tours in Mauritius are half- or full-day trips that combine dolphin watching, snorkeling in the lagoon, and a stop at a small island for lunch. Expect a mix of sailing on catamarans or speedboats, with guides pointing out marine life. The dolphin encounters are the main draw but can feel crowded; boats often cluster around the same pods. Snorkeling is usually decent in the clear turquoise water, though the reefs aren't world-class. Full-day versions include a barbecue lunch on an island like Ile aux Benitiers, with some swimming time. It's a relaxing way to see the coast if you don't want to rent your own boat.
The best time is October to April when the sea is calmer and dolphin sightings are more reliable. Avoid July-August if possible; the southeast trade winds make the water choppier and tours less comfortable. Expect to pay around $60-120 per person for a half-day dolphin/snorkel trip and $90-180 for a full-day cruise with lunch, depending on group size and boat type. Private charters cost significantly more.
Pick a smaller group catamaran tour over a packed speedboat if you want a calmer experience. Skip the whale-watching add-ons outside June-September; you're unlikely to see them and it just inflates the price. Bring your own snorkel gear if you're picky about fit and quality.
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