There is never a dull moment when surging through the ocean’s swell on a 90-degree day or cutting through a lake’s glassy surface with abandon. For the ultimate summer toy on open waters, we recommend the 2018 candy-lime-green Kawasaki Ultra 310LX jet ski ($18,000), which sports an aggressive four-stroke engine, an electronic throttle valve with cruise control, an upgraded three-seat design, and a Jetsound audio experience—making it the only production personal watercraft with an onboard speaker setup.
Syncing your tunes up to the watercraft is as easy as connecting your mobile device via a stereo jack output or USB memory stick, making it ready to blare through the integrated system of the 40- and 60-watt speakers (a water-resistant storage container is included for precious tech). In addition to sound amenities on the water, the 310LX has an intercooled and supercharged engine for instant acceleration and a redline of 5,800 rpms. A fiberglass hull designed with an angled bottom for dynamic performance helps you cut through rough waters and be the first person out to sea every time. This type of luxury (think heat-mitigating seats in the cockpit and ergonomic levers) is typically reserved for on-shore vehicles, but it looks like the Japanese brand is pushing the possibilities of fun for die-hard water lovers.