Heidi Klum Goes Topless at Beach, on Video

Heidi Klum decided to strip all the way down before taking a dip … throwing off her bikini and going for a topless swim in a new video.

The model shared a video to Instagram Sunday in which she’s wearing a thong-style bikini and new top … proving that when the sun is out, it’s more than her buns she’s busting out.

Check out the vid … Heidi takes her model walk from the runway to the beach — striding down the sand toward the ocean.

She goes in about knee-deep before the video cuts off. Klum captioned the post, “Let’s dip” — and, we know a whole lotta fans who want to take her up on that offer.

Klum’s talked about ditching her top in the past … revealing in an interview last year that her kids feel the need to remind her to put on a top when their friends come over to the house.