What's the best time to see rainbows at Iguaçu Falls?

Brazilian side: late afternoon (14h–17h). Devil's Throat (Argentine side): in the morning (11h–12h). A chance, not a guarantee — it depends on the sun appearing at the right moment. Rainbows form with a low sun (below ~42°) behind you, over the falls' mist.

When is the full moon walk (moonbow) at Iguazú?

full-moon nights ±2 — visibility depends on clear skies. Wed 29 Jul · Thu 27 Aug · Sat 26 Sept · Sun 25 Oct. The Argentine Devil's Throat runs the Full Moon Walk on these nights — it sells out, book ahead (official site).

Light and water at the Falls

Rainbows at the Falls

The sun's geometry is certain; the sky is the gamble. See today's rainbow chance by side, the best time for a photo and when the next full moon brings the rare lunar rainbow.

🔭 Foz night sky

stargazing and meteors

fair

Tonight · viewing

72%moon lit

22%clouds at night

Upcoming meteor showers

30 JulDelta Aquáridas~25 meteors/h at peak· great from the Southin 25 days
21 OctOriônidas~20 meteors/h at peak· good from the Southin 108 days
17 NovLeônidas~15 meteors/h at peak· partial from the Southin 135 days
14 DecGemínidas~120 meteors/h at peak· great from the Southin 162 days

🪐 To observe with a telescope: the Itaipu Astronomical Center runs observation sessions.

Peak dates are deterministic (±1 day). The rate (ZHR) is the maximum under a perfect, moonless sky — the real count depends on the Moon, clouds and horizon. Clouds: Open-Meteo.