August 2026 lunar eclipse

Partial Lunar Eclipse 28 August 2026
The moon passes west to east (right to left) across the Earth's umbral shadow, shown in hourly intervals.
Series	138 (30 of 83)
Gamma	-0.4694
Magnitude	-0.9299
Duration (hr:mn:sc)
Partial	3:18:07
Penumbral	5:37:46
Contacts
P1	1:23:55 UTC
U1	2:33;48
Greatest	4:12:49
U4	5:51:55
P4	7:01:41 The lunar eclipse is visible in North america

A partial lunar eclipse will take place on Friday 28 August 2026. The moon will be almost be inside the umbra, but not quite be contained within the umbral shadow at greatest eclipse.

This lunar eclipse follows the total solar eclipse of 12 August 2026.

This eclipse is the fourth and last of an almost tetrad, with others being 14 Mar 2025 (T), 07 Sep 2025 (T) and 03 Mar 2026 (T). In this almost tetrad, it's the only partial lunar eclipse. An almost tetrad occurs when has four consecutive lunar eclipses that has an umbral eclipse magnitude of 0.9 or greater without lunar eclipses that has an umbral eclipse magnitude of 0.89999 or smaller.

Visibility

It will be completely visible over South and eastern North America, will be seen rising over the rest of North America, and setting over Africa and Europe.

Related eclipses

Eclipses in 2026

An annular solar eclipse on 17 February.
A total lunar eclipse on 3 March.
A total solar eclipse on 12 August.
A partial lunar eclipse on 28 August.

Lunar year series

Lunar eclipse series sets from 2024–2027
Descending node				Ascending node
Saros	Date	Type Viewing	Gamma	Saros	Date Viewing	Type Chart	Gamma
113	2024 Mar 25	Penumbral	1.06098	118	2024 Sep 18	Partial	−0.97920
123	2025 Mar 14	Total	0.34846	128	2025 Sep 07	Total	−0.27521
133	2026 Mar 03	Total	−0.37651	138	2026 Aug 28	Partial	0.49644
143	2027 Feb 20	Penumbral	−1.04803	148	2027 Aug 17	Penumbral	1.27974

Last set	2023 May 05			Last set	2023 Oct 28

Next set	2028 Jan 12			Next set	2027 Jul 18

Saros series

Lunar saros series 138 has 26 total eclipses between September 7, 2044 and March 24, 2369. The longest eclipse will be on January 7, 2243, and last for 102 minutes.

Partial eclipses will occur between June 24, 1918 and August 13, 2603. Penumbral eclipses will occur between October 15, 1521 and March 30, 2982. ^[1]

Metonic series

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will be in nearly the same location relative to the background stars.

1988 Mar 03.675 – Partial (113) 2007 Mar 03.972 – Total (123) 2026 Mar 03.481 – Total (133) 2045 Mar 03.320 – Penumbral (143)	1988 Aug 27.461 – partial (118) 2007 Aug 28.442 – total (128) 2026 Aug 28.175 – partial (138) 2045 Aug 27.578 – penumbral (148)

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).^[2] This lunar eclipse is related to two total solar eclipses of Solar Saros 145.