Yes it will be.
You will find better answers here :
https://moz.com/community/q/would-adding-an-ssl-certificate-help-my-website
He is correct and you are saying stop spam. SSL certificates is good for seo.wow great answer ,,,stop spam
Excellent advice! When I switched my first site to HTTPS and redirected the HTTP versions to HTTPS, I went into Google Webmaster Tools a week later and saw my pages getting deindexed. I nearly panicked, and then I remembered that I never added the HTTPS version of my site to Webmaster Tools.When you add a HTTPS site, and you use Webmaster Tools, be sure to add the https site there as well because Google sees both as different sites.
http://yoursite and https://yoursite are two DIFFERENT sites.
Also, if you don't redirect all the http to https, then you have duplicate content.