There are a large number of organizations, search engines, and bots which are scanning the entire Internet on a regular basis to see what ports are open and what versions of services exist. An example of a site doing this type of work is scans.io Most of this activity is not harmful.
There are even tools like masscan and Zmap which allow anyone to scan the entire IPv4 space for a given port/service in just a few minutes and you can see samples of the types of data collected at sites like scans.io
Without more information about the packets themselves it would be very hard to tell you if these were malicious in nature but most likely this is just typical Internet traffic. That said it would be wise to dig a little deeper and see if this is related to process activity on your system and see if your system, or the software on it, isn't the source for this activity.