If you want a tour around Jeddah, getting to know the heritage, the Red Sea and all the awesomeness that envelopes this beautiful city, then you should try to sign up for the following city tours:

Ahlam Groups Tourism:

Their tours include sea trips on boats, diving and scuba diving spots, and island tours.

Sad As-Samalqi Tourism Company:

It usual tours include historical and archeological sites.

Deira Tour Operators:

Their tours include cruises, inland and desert trips, safaris, and trips to historical and archeological sites. They also cover tourism festivals and events.

Al Shitaiwi Tours:

These tours include full country adventure tours that stop over at all main cities in the Kingdom, including Jeddah,  and incorporate adventurous desert trips in each city, all in 14 days. Lastly, some of their tours cover both Saudi Arabia and neighboring countries, reaching Jordan.