London's Euston Station will be the first location to receive the wireless service, which will bring Sky News and Sky Sports News to commuters.
The portal will deliver news, video content and images from both channels to users' handsets without the need for 3G, as well as provide real-time local and national travel new.
T3 understands that the service will be funded by advertisements, with users incurring no additional cost. Bakery chain Greggs has been confirmed as The Cloud's first advertising partner.
Sky acquired The Cloud in January in a deal worth £17.1 million, a move that was initiated to bolster the broadcaster's mobile services such as Sky Go.
Millions of London Overground passengers will be able to access free WiFi at every station on the network from this summer thanks to a separate initiative from The Cloud.
The new content portal will launch on June 15.