Penumbral lunar eclipse — August 17, 2027
Explore the penumbral lunar eclipse on August 17, 2027. See when its stages occur and whether the Moon is above the horizon at your location. Visibility also depends on local sky conditions.
Penumbral lunar eclipse
August 17, 2027 · greatest eclipse 07:14 UTC
The moon passes only through the penumbra, the soft outer shadow. The disc dims slightly on one side and never darkens sharply — the subtlest kind, and easy to miss.
Timeline
Every one of these instants is the same moment everywhere on Earth — the shadow falls on the moon, not on you. UTC is baked in; your own time zone appears underneath when the page loads.
the moon touches the soft outer shadow — hard to notice at first05:25 UTC
Aug 17, 2027
the moon is deepest in the shadow07:14 UTC
Aug 17, 2027
the moon is clear of the shadow09:02 UTC
Aug 17, 2027
Can you see it?
A lunar eclipse has no narrow path — everyone on the night side of the Earth sees the same thing at the same instant. At greatest eclipse the moon is directly overhead near 12°S, 107°W, so it is best placed over the eastern Pacific and western North America. Further from there, the moon sits lower; on the far side of the world it is below the horizon and the eclipse happens in daylight.
Worked out from the moon's altitude at your coordinates at greatest eclipse. Cloud is not included — nothing on this site knows the weather.
What to expect
This is a penumbral eclipse — the moon misses the dark umbra entirely and passes only through the soft outer shadow, for 3 h 37 min. Expect a subtle grey shading across one side of the disc near maximum, not a bite. Many people looking casually would not notice it at all.
No equipment and no eye protection are needed. Unlike a solar eclipse, a lunar eclipse is completely safe to watch with bare eyes.
More
Previous: Feb 20, 2027 · Next: Jan 12, 2028 · All lunar eclipses · Moon calendar · Moon phase today
Dates and circumstances are computed with the same method as the moon phases on this site — see how the moon phase is calculated.