A ton of Roombas are randomly on sale at the end of August

August falls right in the limbo period between Prime Days — the one that always happens in July and, unless Amazon goes rogue this year, the one that has become an October tradition in recent years. But Roomba deals are randomly alive and well at Amazon.

Yes, everyone's favorite robot vacuums to eye on Prime Day are on sale at Amazon at the end of August (many models, at least), some even matching or beating their record-low pricing from July. We've pulled the noteworthy ones below.

Best Roomba deal

Why we like it

iRobot's j5 series robot vacs are the cheapest Roombas that can steer clear of phone chargers and pet waste, now even more affordable with a straight up 50% discount on this Combo j5 model. I first experienced iRobot's small obstacle avoidance when testing the Combo j7+, and after testing several other Roombas (including this j5) and competitors, I can confidently call iRobot's obstacle avoidance tech the best in the game. If your previous hesitation with robot vacuums stemmed from the need to clean up before they could clean, this is your answer.

As a Combo model, the Combo j5 does mop. Rather than having the water tank onboard 24/7 like the Combo j7+ or j9+, you will have to physically click the water tank on and off to enter mopping mode. Compared to the j7 series, the j5's cameras also aren't quite as precise, and still may require you to pick up things like socks.

More Roombas on sale

• iRobot Roomba j7+ with self-empty station (renewed premium) — $299.99 $499.99 (save $200)

• iRobot Roomba j7+ with self-empty station — $429.99 $799.99 (save $370)

• iRobot Roomba j9+ with self-empty station — $599 $899 (save $300)

Vacuum and mop combo

• iRobot Roomba Combo i5 — $229 $349.99 (save $120.99)

• iRobot Roomba Combo i5+ with self-empty station — $349 $549.99 (save $200.99)

• iRobot Roomba j5+ with self-empty station — $449 $799.99 (save $350.99)

• iRobot Roomba Combo j7+ with self-empty station — $699.99 $1,099.99 (save $400)