<div id="wrap">

  <!-- section -->
  <div class="section">
    <div class="center">

      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>
      <div class="block">Fade out</div>

    </div>
  </div>
  <!--/section -->

</div>

html,
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1.4;
  color: #555;
  background: #fff;
}

* {
  box-sizing: border-box;
}

#wrap {
  position: relative;
}

.section {
  padding: 40px;
}

.center {
  width: 100%;
  max-width: 980px;
  margin: auto;
}

.block {
  width: 200px;
  height: 200px;
  background: #000;
  margin: 0 auto 20px;
  line-height: 200px;
  text-align: center;
  color: #fff;
  transition: opacity .4s ease;
  
  &:last-child {
    margin-bottom: 0;
  }
}

.disappear {
  opacity: 0;
}

function fadeOutBlocks(elem, tolerance = 0) {
  var winScroll = $(window).scrollTop() + tolerance;
  
  elem.each(function() {
    var $elem = $(this),
      elemTop = $elem.offset().top;
    
    
    if(winScroll > elemTop) {
      $elem.addClass('disappear');
    } else {
      $elem.removeClass('disappear');     
    }
  });
  
}

$(window).on('load scroll', function () {
  //  tolerance -- отступ сверху, если нужно, чтобы элемент исчезал раньше, по умолчанию 0
  fadeOutBlocks($('.block'), 50);
});