These are the things that could be slowing down your site:
- Image file size: Images used on your website should be optimized to load readily on browser. You can reduce file sizes using any image editor. There are various articles on the Internet to optimize files for the web. Look them up.
- Third party widgets
- Third party code in your computer
I suggest removing each of these one by one to isolate what could be causing this issue.
Now that I am looking at your site, I see some very high quality images. They could be potentially slowing things down.