The August 2015 LEGO Store Calendar is already up on the servers and there are some promotions for the month that may interest you.
From August 1-14, you can get a FREE exclusive Classic Pirates set with purchases of $75 or more.
From August 1-31, you can get a FREE LEGO Friends Pop Star Red Carpet (30205) polybag with purchases of $35 or more on LEGO Friends, LEGO Elves, or LEGO Disney Princess sets.
From August 24-30, you can get a FREE collectible LEGO Star Wars Episode I: The Phantom Menace poster with any LEGO Star Wars purchase.
From August 18-31, VIPs get early access to a new exclusive set. Rumors has the set being the LEGO Ninjago Temple (70751).
The August Monthly Mini Model Build will be a Kangaroo which looks more like a squirrel. Remember that you have to register in July to be eligible to participate at the event.
Finally, on August 1, the new LEGO Creator Ferrari F40 (10248) will be available for everyone to purchase. The summer 2015 wave of LEGO Minecraft, LEGO Elves, LEGO TECHNIC, and LEGO DUPLO sets will be available as well the new LEGO Scooby-Doo sets. The LEGO Ideas The Big Bang Theory (21302) will also be available on August 1st.