Because Manhattan is surrounded by water, it shouldn't come as a surprise that there are plenty of great water-sport options in the city-though keeping your own SUP board or kayak in a Manhattan apartment may prove to be a bit of a challenge. Luckily, there are plenty of rental options, tour groups, lessons, and even free kayaking on weekends in the summer.
If you want to dabble in kayaking, the Manhattan Community Boathouse offers free kayaks in the summer-sure, you're stuck in a contained area of the Hudson, but if you're just looking to get off of dry and for a bit, this is a fun option. Otherwise, there are plenty of rental companies with boathouses right along the water as well.
SUP options are increasing as well, as the sport gains popularity, and the Manhattan Kayak Company offers lessons (including SUP Yoga and more advanced classes) as well as tours ranging from basic hour-long ones to full day trips.
If you're willing to head outside of the city, Croton Point Park has plenty of options from SUP boarding to kayaking, plus a lovely little beach on the inlet for some excellent sunbathing and picnicking away from the busy city. The inlet is smooth and great for beginners, but it's also a great spot to start an ultra-long SUP or kayak tour-and there are plenty available.