Karol G Showers Off in Blue Bikini During Yacht Day

Karol G stays turning up the temps ... but she may've just cooled things off with an onboard rinse ... and you can watch her shower off after a busy day on a yacht.

The 35-year-old singer stunned in her latest slew of sexy snaps ... sporting a blue stringy bikini on a boat day in paradise.

A chest-baring selfie a day keeps the thirst at bay ... and Karol is clearly enjoying her kick-off to summer ... gearing up for her major world tour, "Viajando Por El Mundo Tropitour."