Dubrovnik Sea Kayak Tour. See Dubrovnik from a totally different perspective: via the water in a kayak. This 2.5- to 3-hour tour allows you to paddle right up to the city’s thick medieval walls and then over to nearby Lokrum Island for some snacks, hiking, swimming or sun bathing, before padding back to the mainland again. Opt for one of three departure times. Book the evening tour and there’s a special treat in store: a glass of local wine to sip as the sun sets beyond the horizon. Book and Save 15%! Dubrovnik Sea Kayak Tour.