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

Brazilian side: late afternoon (no favorable window today). Devil's Throat (Argentine side): in the morning (no favorable window today). 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. Thu 27 Aug · Sat 26 Sept · Sun 25 Oct · Tue 24 Nov. 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.

🌈 Rainbows at the Falls

today's chance, by side

Brazilian sideLOW chance

late afternoon · no favorable window today

very cloudy · high river boosts the mist

Devil's Throat (Argentine side)LOW chance

in the morning · no favorable window today

very cloudy · high river boosts the mist

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.

Saw a rainbow at the Falls today? 🌈

🌕 Lunar rainbow (moonbow) calendar

full-moon nights ±2, visibility depends on clear skies

Thu 27 AugHIGH
Sat 26 Septdepends on the sky (beyond forecast range)
Sun 25 Octdepends on the sky (beyond forecast range)
Tue 24 Novdepends on the sky (beyond forecast range)

🌙 The Argentine Devil's Throat runs the Full Moon Walk on these nights, it sells out, book ahead iguazuargentina.com ↗

Sun and moon geometry: astronomical calculation (deterministic). Clouds: weather forecast. Flow: ANA. Known windows: Brazilian side at late afternoon, Argentine Devil's Throat in the morning.

🔭 Foz night sky

stargazing and meteors

poor

Tonight · viewing

45%moon lit

76%clouds at night

Upcoming meteor showers

21 OctOriônidas~20 meteors/h at peak· good from the Southin 63 days
17 NovLeônidas~15 meteors/h at peak· partial from the Southin 90 days
14 DecGemínidas~120 meteors/h at peak· great from the Southin 117 days
04 JanQuadrântidas~110 meteors/h at peak· partial from the Southin 138 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: weather forecast.

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.

🌈 Rainbows at the Falls

today's chance, by side

Brazilian sideLOW chance

late afternoon · no favorable window today

very cloudy · high river boosts the mist

Devil's Throat (Argentine side)LOW chance

in the morning · no favorable window today

very cloudy · high river boosts the mist

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.

Saw a rainbow at the Falls today? 🌈

🌕 Lunar rainbow (moonbow) calendar

full-moon nights ±2, visibility depends on clear skies

Thu 27 AugHIGH
Sat 26 Septdepends on the sky (beyond forecast range)
Sun 25 Octdepends on the sky (beyond forecast range)
Tue 24 Novdepends on the sky (beyond forecast range)

🌙 The Argentine Devil's Throat runs the Full Moon Walk on these nights, it sells out, book ahead iguazuargentina.com ↗

Sun and moon geometry: astronomical calculation (deterministic). Clouds: weather forecast. Flow: ANA. Known windows: Brazilian side at late afternoon, Argentine Devil's Throat in the morning.

🔭 Foz night sky

stargazing and meteors

poor

Tonight · viewing

45%moon lit

76%clouds at night

Upcoming meteor showers

21 OctOriônidas~20 meteors/h at peak· good from the Southin 63 days
17 NovLeônidas~15 meteors/h at peak· partial from the Southin 90 days
14 DecGemínidas~120 meteors/h at peak· great from the Southin 117 days
04 JanQuadrântidas~110 meteors/h at peak· partial from the Southin 138 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: weather forecast.