But even then it will not display, check in your browser: right-click => inspect => console Refused to display ‘https://ocean.weather.gov/A_sfc_full_ocean_color.png’ in a frame because it set ‘X-Frame-Options’ to ‘sameorigin’
So you are not allowed to display those images in an iframe.
More and more websites do that as they do not want their content “copied”