Astronomy Essentials

A deep partial solar eclipse September 21, 2025

Posted by
Marcy Curran
and
September 20, 2025
Golden crescent sun during a partial solar eclipse (through a filter), with little flares along the edge.
View at EarthSky Community Photos. | David Hoskin in Halifax, Nova Scotia, Canada, captured this photo of a partial solar eclipse on June 10, 2021. He wrote: “I drove out to York Redoubt, a historical site outside of Halifax, to set up to photograph the partial solar eclipse. This hydrogen alpha image was taken at the peak when about 68% of the sun was covered by the moon.” Stunning detail! Thank you, David.

Partial solar eclipse

The partial solar eclipse of September 21, 2025, is visible in the South Pacific including New Zealand and parts of Antarctica. It’s the last eclipse of 2025.

When and where to watch: The September 21, 2025, partial solar eclipse is visible from the South Pacific including New Zealand and parts of Antarctica. The partial eclipse starts at sunrise at 17:29 UTC. The partial eclipse remains visible through 21:53 UTC when the shadow leaves Earth.
Maximum eclipse: is at 19:41 UTC when 85% of the sun will be hidden behind the moon.
Note: This is a deep partial eclipse.

Countries where the eclipse is visible

The number one rule for solar eclipse observing is to make sure you protect your eyes by using an appropriate filter. Purchase eclipse viewers from the EarthSky Store.

Moon, constellation, Saros

This partial solar eclipse occurs 4.6 days before the moon reaches apogee, its farthest point to Earth.

During the eclipse, the sun is in front of the constellation Virgo.

The eclipse belongs to Saros 154 in the Saros catalog of eclipses that describes their periodicity. It is number 7 of 71 eclipses in the series. All eclipses in this series occur at the moon’s descending node. The moon moves northward with respect to the node with each succeeding eclipse in the series.

Read more: Partial solar eclipse of September 21, 2025

This ends the second eclipse season of 2025

The current eclipse season has two eclipses. This partial solar eclipse was preceded by a total lunar eclipse on September 7. They are part of the second eclipse season of 2025. An eclipse season is an approximate 35-day period during which it’s inevitable for at least 2 (and possibly 3) eclipses to take place.

The first eclipse season was in March. There was a total lunar eclipse on March 13-14, 2025, followed two weeks later by a partial solar eclipse on March 29, 2025.

Map showing path of a partial solar eclipse on September 21, 2025, on the Earth.
A map of the partial solar eclipse of September 21, 2025. You must protect your eyes to watch the partial phases of any solar eclipse. Key to Solar Eclipse Maps here. Image via Fred Espenak.

Maps and data for September 21 partial solar eclipse

Orthographic map: partial solar eclipse of September 21, 2025. Detailed map of eclipse visibility.
Google map (scroll down): partial solar eclipse of September 21, 2025. Interactive map of the eclipse path.
Circumstances table: partial solar eclipse of September 21, 2025. Eclipse times for hundreds of cities.
Animated map of the moons shadow across the Earth.
Saros 154 table: data for all eclipses in the Saros series.
Additional tables and data for this event.
Timeanddate.com September 21 partial solar eclipse.
In-the-sky.org September 21 partial solar eclipse.
Animation of the September 21 partial eclipse.

Here’s what a partial solar eclipse looks like

Bright crescent in orange clouds plus big bird in front of dark area of eclipse.
View at EarthSky Community Photos. | Our friend James Trezza in Cedar Beach, Mount Sinai, New York, captured this photo of the partial solar eclipse of June 10, 2021. He wrote: “Solar eclipse 2021! Nothing like perfect timing with a bird flying through the frame during the eclipse.” Thanks, James! The March 29 eclipse will be a partial, but deep, eclipse, similar to the eclipse shown in this photo.

Bottom line: A deep partial solar eclipse will occur on September 21, 2025. The path sweeps across the South Pacific including New Zealand and parts of Antarctica.

How to safely observe a partial solar eclipse

Planet-observing is easy: Top tips here

See photos of the April 8, 2024, total solar eclipse

Want events to observe? Visit EarthSky’s night sky guide

BlueskyThreadsBuffer
Posted 
September 20, 2025
 in 
Astronomy Essentials

Marcy Curran

View Articles
About the Author:
Meet Marcy Curran, our voice of the night sky on EarthSky YouTube. Check out her popular short videos in the Sky category on our YouTube channel. When she's not making videos, Marcy is an EarthSky editor, helping to keep our night sky guide up-to-date and just generally helping to keep the wheels turning around here. Marcy has enjoyed stargazing since she was a child, going on family camping trips under the dark skies of Wyoming. She bought her first telescope in time to see Halley’s Comet when it visited the inner solar system in 1986. She co-founded her local astronomy club and remains an active board member. Marcy taught astronomy at her local community college for over 20 years. She and her husband live in Wyoming, in a rural location, with an all-sky camera and super-good horizon views! And, their observatory will soon be ready to photograph the night sky.

Like what you read?
Subscribe and receive daily news delivered to your inbox.

Your email address will only be used for EarthSky content. Privacy Policy
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

More from 

Marcy Curran

View All
Visible planets and night sky guide for March
March 10, 2025
Total lunar eclipse of Full Worm Moon on March 13-14, 2025
March 7, 2025
R Aquarii: A dynamic duo with geyser-like eruptions
October 22, 2024
Last of 4 full supermoons in a row is the Super Beaver Moon
October 1, 2024