Josie Canseco came thiiiiis close to losing a fight with the Pacific Ocean on Thursday ... holding on to her thong for dear life during a beach day in Waikiki.
The Victoria's Secret model is out in Oahu for the opening of a Kith/Coca-Cola pop up shop (she;'s modeled for them in the past) ... but decided to take a break to frolic in the sand. The pics are straight fire.
But during her dip, the tide got a little aggressive ... and nearly took her down her bottoms. A struggle for the ages ensued.