Southern Delta Aquariids 2026: the moon at peak

Jul 31, 2026, 04:11 UTC · Calculated July 26, 2026

98% Poor — a bright moon washes out all but the brightest meteors.

Peak and moon conditions

Peak (UTC)

Jul 31, 2026, 04:11 UTC

Illumination

98%

Full moon

Peak rate (ZHR)

~25/hour

Radiant

Aquarius

Active period

Jul 12 – Aug 23

Peak night by city

For each city: the local time of the peak, and how much of that night is both astronomically dark and free of moonlight.

City	Peak (local time)	Astronomical darkness	Moon-free darkness	Moonrise	Moonset	Rating
Seoul	Fri, Jul 31 13:11	6.5 h	None	20:39	07:54 (+1)	Poor
Tokyo	Fri, Jul 31 13:11	6.7 h	None	19:45	07:03 (+1)	Poor
New York	Fri, Jul 31 00:11	5.9 h	None	20:57	07:45 (+1)	Poor
Los Angeles	Thu, Jul 30 21:11	6.9 h	None	20:47	07:59 (+1)	Poor
London	Fri, Jul 31 05:11	2.7 h	None	21:23	07:14 (+1)	Poor
Madrid	Fri, Jul 31 06:11	6.0 h	None	22:11	08:52 (+1)	Poor
Sydney	Fri, Jul 31 14:11	10.7 h	0.1 h	18:47	08:08 (+1)	Poor
São Paulo	Fri, Jul 31 01:11	10.4 h	None	18:46	07:56 (+1)	Poor

Why the moon decides a meteor shower

Meteor rates quoted as ZHR assume a perfectly dark sky with the radiant overhead. Real counts fall off fast with sky brightness, and the moon is the one source of sky brightness that is completely predictable years ahead. A full moon near the peak can cut visible meteors by three quarters even under a cloudless sky. That is why the useful question is not “when is the peak” but “where is the moon at the peak” — which is what this page computes.

Other years

Other meteor showers

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