Writing up this report as I couldn't find a lot of accurate information on current conditions for Iguazu Falls, which has been receiving record breaking water flow levels due to El Niño over the past month. Hubs and I visited both the Argentinian and Brazilian sides on Oct 26 & 27 (today), truly once-in-lifetime experience for us!
We went to the Argentina park yesterday and only the lower falls walkway was available to visit. We were initially bummed out about it until we actually saw the walkways above the falls - the water was right up to them at times, very sketchy! Made sense why the shut down quite a bit of the park, altho frustrating this was not updated on their website. For anyone visiting - Upper Falls & Devils Throat walkway are closed. Tons of coatis and monkeys running around, absolutely delightful.
Went to the Brazil side today and the primary walking trail is completely open except for the section that juts out into the water, pic provided for context why. Saw the boats were running from one of the companies but they couldn't get far in to the Brazilian side as the water was wayyy too powerful, didn't seem worth it. If I had to only pick one side to visit I would go with Brazil at the moment, still a comprehensive experience! We did get very wet on the Brazilian side, Argentinian side needed a raincoat but not as bad. Saw many tegus, couple coatis. Of note - I booked the 10:30am time slot, we got there around 9:15am (bus left at 8:30am from Puerto Iguazu) and had no issues with them letting us in early.
We took direct busses from Puerto Iguazu to both parks via Rio Uruguay, easy! The bus to Brazil did not stop at Brazilian customs both ways (just Argentinas), I guess if its a day trip they don't seem to care? Was a non-issue for us anyway. Both busses weren't full so we also had no issues with the bus leaving us behind like I'd read online, only a couple of minutes total and we were back on our way! Super straightforward.
Added comparison pics - the obvy deluge pics are mine, first pic is from WestEnd61 and the one of Salto dos Hermanas I pulled from TripAdvisor.
Overall it wasn't the experience we were expecting when we booked, but happy we got to see the falls at such a unique time, wildly powerful!