Move your dates to the back half of the month and everything improves at once
The gap between the first week of August and the last week is the largest same-month swing in crowd and price that Universal Orlando produces. Hotel rates fall, ticket tiers fall, Express Pass falls, and daytime queues fall, all within about three weeks and all in the same direction.
The heat does not improve, which is the honest caveat. Late August in Orlando is as hot and as wet as mid-July, and the only thing that has changed is how many people are standing in it with you. If heat is your limiting factor rather than crowd, this month is not the answer at any point in it.
For Hollywood the same instruction applies a week or two earlier, because Southern California schools return before Florida's do. Mid-August onward is the beginning of the best stretch of the Hollywood year, which runs through September and into October.
Halloween Horror Nights opens in Orlando, and the early nights are the cheap ones
Universal Orlando's Halloween season has opened in late August or the first days of September across recent cycles, and the opening weeknights are the least expensive and least crowded nights of the entire run. The same event in late October costs substantially more and delivers substantially longer house queues.
This is a separately ticketed evening event rather than an overlay, and it is not a family Halloween product. The houses are built to frighten adults, there is no trick-or-treating layer, and Universal is explicit that it is not recommended for young children. Families looking for a costume-and-candy evening should look elsewhere on the calendar entirely.
The event ticket admits you to the park in the evening rather than replacing a day ticket, and the daytime park closes early on event nights to change over. That is the detail that catches first-timers: an event night is not a full park day with a party attached, and planning it as one wastes the afternoon.
Hurricane season is a booking decision, not a packing decision
The most active part of the Atlantic hurricane season runs from mid-August through October, and Orlando is inland enough that the usual outcome is a day of heavy rain and closed outdoor attractions rather than anything worse. The planning risk is not the storm; it is the airport.
Buy refundable or flexible fares if you are travelling to Orlando in this window, and check what the hotel and the ticket seller will do if you cannot travel. Universal has historically been reasonable about rebooking around named storms, but the airline is the part that costs money.
This is the reason we grade late August below late September on value despite similar crowd levels. Same crowd, same heat, more risk, and the Horror Nights price advantage is the thing that partly offsets it.
The Hollywood Halloween season has usually not started yet
Halloween Horror Nights at Universal Studios Hollywood has typically opened later than Orlando's, generally in early September rather than August. A mid-August California trip therefore gets low crowds and no seasonal content, which is a reasonable trade but not the one most people think they are booking.
If Horror Nights is the point of a Hollywood trip, September and October are the months, and the same early-season pricing logic applies there as in Orlando: the first weeknights of the run are the cheapest and the shortest-queued.
The daytime park in late August is at its best of the second half of the year. Local schools are back, the summer visitors have gone, and the weather is hot but dry. It is a good month to do the park properly and a poor month to expect atmosphere.