2026 Supermoon Dates: When, Where, and How to See Every Supermoon This Year

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Quick Answer

There are three supermoons in 2026: the Harvest Moon on October 7, the Beaver Moon on November 5, and the Cold Moon on December 5. The November 5 supermoon is the closest of the three at roughly 355,800 km from Earth, making it the largest and brightest full moon of the year. Supermoons occur when a full moon falls within 90% of the Moon's closest orbital distance to Earth (perigee), causing the Moon to appear noticeably brighter and slightly larger than average.

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What Is a Supermoon?

A supermoon is the popular term for what astronomers call perigee-syzygy — the coincidence of a full (or new) moon with the Moon's closest orbital approach to Earth. The word "syzygy" (pronounced SIZ-ih-jee) refers to the straight-line alignment of the Sun, Earth, and Moon that occurs at full and new moons, while "perigee" is the point in the Moon's elliptical orbit where it comes closest to Earth.

The Scientific Definition

The Moon's orbit around Earth is not a perfect circle — it's an ellipse. This means the Moon's distance from Earth varies continuously:

• Perigee: The Moon's closest point to Earth, approximately 356,500 km on average (but varies by orbit)
• Apogee: The Moon's farthest point from Earth, approximately 406,700 km on average
• Average distance: Approximately 384,400 km

The term "supermoon" was coined by astrologer Richard Nolle in 1979, who defined it as:

A new or full moon which occurs with the Moon at or near (within 90% of) its closest approach to Earth in a given orbit.

Under Nolle's definition, both full and new moons can qualify as supermoons. However, since new moons are invisible, the term is most commonly applied to full moons, where the effect is visually observable.

The 90% Rule Explained

The "90% of closest approach" threshold works like this: If the Moon's closest perigee in a given year is, say, 356,500 km, then 90% of that distance would be roughly 360,000 km. Any full moon occurring when the Moon is closer than 360,000 km qualifies as a supermoon.

Different organizations use slightly different thresholds. NASA generally considers any full moon within 362,000 km of Earth to be a supermoon, while others use stricter criteria. The variation in definitions explains why different sources sometimes list different numbers of supermoons per year.

Why the Moon's Distance Varies

The Moon's elliptical orbit is caused by gravitational interactions — primarily with Earth, but also perturbed by the Sun and other planets. The orbit is not fixed; it rotates slowly (a phenomenon called apsidal precession), completing one full rotation roughly every 8.85 years. This means perigee doesn't always occur at the same point relative to the Moon's phase cycle. When perigee happens to coincide with (or fall very close to) a full moon, we get a supermoon.

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All Supermoons in 2026

The table below lists every supermoon in 2026 with key data for each event.

| Date | Full Moon Name | Distance from Earth (km) | Angular Diameter | Time of Full Moon (UTC) | |---|------|---------------|-------------------------|-----------------|----------------------| | 1 | October 7 | Harvest Moon | ~357,200 | ~33.4 arcmin | 04:15 | | 2 | November 5 | Beaver Moon | ~355,800 | ~33.5 arcmin | 17:43 | | 3 | December 5 | Cold Moon | ~356,500 | ~33.4 arcmin | 07:22 |

Comparison: Supermoons vs. Average Full Moons

Note: "Brightness" here refers to the difference between a perigee full moon and an apogee full moon, as measured by the Moon's illuminance at Earth's surface.

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How Much Bigger and Brighter Is a Supermoon?

This is one of the most misunderstood aspects of supermoons, so let's break down the numbers carefully.

Size Comparison

The Moon's angular diameter at perigee (closest) is approximately 33.5 arcminutes, compared to about 29.4 arcminutes at apogee (farthest). That's a difference of roughly 4.1 arcminutes, which translates to the supermoon appearing about 14% larger in diameter than a micromoon.

However, most people compare the supermoon to an "average" full moon rather than the most distant possible one. Compared to an average full moon, the supermoon is only about 7% larger in diameter — a difference that is extremely difficult to perceive with the naked eye.

Brightness Comparison

The Moon follows an inverse-square law for brightness: as it gets closer, it gets brighter at a rate proportional to the square of the distance decrease. A supermoon at perigee is roughly 30% brighter than a full moon at apogee. Compared to an average full moon, the increase is more modest — approximately 15–16% brighter.

Can You Perceive the Difference?

Here is the honest truth: most people cannot reliably distinguish a supermoon from an average full moon by size alone when viewing it in isolation in the night sky. The 7% size difference is below the threshold of casual visual perception. The 15–16% brightness difference is somewhat more noticeable, particularly if you know what to look for — the landscape will appear slightly more illuminated, and shadows on the ground will be somewhat sharper.

The exception is the moon illusion — the well-documented psychological effect where the Moon appears enormous when it is near the horizon. This effect is purely perceptual and has nothing to do with the Moon's actual size, but it amplifies the visual impact of any moonrise, supermoon or not. When a supermoon rises and the moon illusion kicks in simultaneously, the result can be genuinely striking.

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The Closest Supermoon of 2026

The November 5, 2026, Beaver Moon is the closest supermoon of the year. At approximately 355,800 km from Earth, it will be the largest and brightest full moon of 2026.

Key Details

This supermoon occurs just two days after the Moon reaches perigee (its closest orbital point), ensuring near-maximum size and brightness. For observers in the Northern Hemisphere, the November full moon follows a high trajectory across the sky, remaining visible for approximately 15 hours from moonrise to moonset — one of the longest full moon visibilities of the year.

How to Make the Most of the November 5 Supermoon

1. Watch at moonrise. Find a location with a clear eastern horizon and watch the Moon emerge around sunset. The combination of the moon illusion and warm atmospheric coloring makes this the most photogenic moment.

2. Compare with a micromoon. Take a photo of the November 5 supermoon and another of the May 13 Flower Moon (near apogee at ~404,000 km) using the same camera and lens settings. The side-by-side comparison makes the size difference obvious.

3. Observe the increased illumination. Step outside around midnight when the Moon is high. Note how brightly the landscape is lit — you may be able to read small print or distinguish colors, which is difficult under an average full moon.

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Supermoon vs. Micromoon

If a supermoon is a full moon near perigee, a micromoon is its opposite — a full moon near apogee, when the Moon is at its farthest from Earth. The contrast between the two extremes is the best way to appreciate how much the Moon's apparent size varies.

2026 Micromoon Dates

The full moons in the first half of 2026 occur near apogee, making them effective micromoons:

The February 12 Snow Moon is the most distant full moon of 2026 at roughly 403,500 km, making it the smallest and dimmest full moon of the year — the opposite of the November 5 supermoon.

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Can You Actually See the Difference?

This deserves an honest, detailed answer because the gap between the supermoon hype and the supermoon reality often frustrates first-time observers.

What You WILL Notice

• Increased ground illumination. On the night of a supermoon, the landscape is visibly brighter than during an average full moon. If you live in a rural area without artificial light, you may notice that you can see farther and more clearly by moonlight.
• Longer moonlight duration. Supermoons near the horizon are visible for a longer arc across the sky, particularly in winter months when the Moon's trajectory is high.
• Dramatic moonrise. When the Moon rises near the horizon, the moon illusion makes it appear enormous regardless of its actual distance. A supermoon rising benefits from this illusion just like any other moon.

What You Will NOT Notice

• A dramatic increase in size. The 7% diameter increase over an average full moon is not perceptible without a reference. You cannot hold your hand up to the sky and say "that moon is 7% larger than last month."
• A doubling of brightness. Despite the "30% brighter" statistic (compared to a micromoon), the difference compared to an average full moon is only about 15%. Your eyes adapt to brightness changes logarithmically, making this subtle.
• Any supernatural effects. Supermoons do not cause earthquakes, volcanic eruptions, unusual human behavior, or any other paranormal phenomena. More on this below.

The Best Way to Perceive the Difference

The only reliable way to visually confirm the supermoon size difference is through photography with consistent settings. Set up your camera on a tripod at the same focal length, photograph the supermoon at moonrise, and photograph a micromoon at moonrise using identical exposure settings. Overlay the images, and the difference becomes clear.

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Supermoon and Tides: Perigean Spring Tides

The Moon's gravitational pull is the primary driver of Earth's ocean tides, and the strength of that pull increases as the Moon gets closer. During a supermoon, the Moon's proximity intensifies the tidal effect, producing what oceanographers call perigean spring tides.

What Are Perigean Spring Tides?

Spring tides — the highest high tides and lowest low tides — normally occur twice per month during full and new moons, when the Sun and Moon align. When a spring tide coincides with perigee (as it does during a supermoon), the Moon's extra gravitational pull adds approximately 2–5 cm (1–2 inches) to the normal spring tide height.

This may sound negligible, and in most locations it is. However, in areas with large natural tidal ranges or narrow coastal inlets, the effect can be amplified to 15 cm (6 inches) or more.

Potential Impacts

Should Coastal Residents Be Concerned?

On their own, perigean spring tides rarely cause problems. The additional height is measured in inches, not feet. However, when a perigean spring tide coincides with a coastal storm — a nor'easter, hurricane, or strong onshore wind — the elevated baseline tide gives storm surge a head start, increasing the risk of coastal flooding. Cities like Miami, Charleston, and Norfolk already experience "sunny day flooding" during king tides, and perigean spring tides can worsen this.

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Photography Tips for Supermoons

Supermoon photography is one of the most shared types of astrophotography, and with good technique, you can capture images that genuinely show the Moon's impressive size and detail.

Essential Gear

Camera Settings for Supermoon Photography

Close-up Moon detail (telephoto):

Moonrise with landscape (wide-angle):

Advanced Technique: Composite Images

The most dramatic supermoon photos are usually composites — two exposures blended together. One exposure captures the Moon's surface detail (short shutter speed, telephoto), and the other captures the landscape (longer exposure, wide-angle). When combined, the result shows a large, detailed Moon rising above a recognizable landmark. This technique is widely used and accepted in astrophotography, though it should be disclosed as a composite.

The Moon Illusion in Photography

The moon illusion — the apparent enlargement of the Moon when near the horizon — does not show up in photographs. A camera records the Moon's true angular size, which is essentially the same at the horizon as it is overhead. If you want to capture the "big moon" look that your eyes perceive, you need a telephoto lens (400mm+) and a distant foreground subject (a building, mountain, or tree line at least a mile away). The telephoto magnification compresses the scene, making the Moon appear large relative to the distant foreground — mimicking what your brain does during the moon illusion.

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Supermoon Myths Debunked

Supermoons attract outsized attention, and with that attention comes misinformation. Let's address the most persistent myths with evidence-based answers.

Myth 1: Supermoons Cause Earthquakes

Verdict: False. While the Moon's gravity does create small tidal stresses in Earth's crust (called "solid Earth tides"), these forces are extremely small — on the order of a few microstrains. Multiple studies, including a comprehensive USGS analysis, have found no statistically significant correlation between supermoons and earthquake frequency. Small tidal stresses may very slightly influence the timing of an earthquake that was already about to happen, but they do not cause earthquakes.

Myth 2: Supermoons Drive People Mad (the "Lunacy" Effect)

Verdict: False. The word "lunatic" derives from "luna" (Latin for Moon), and the belief that the Moon affects human behavior dates back millennia. However, large-scale studies consistently find no correlation between full moons (super or otherwise) and emergency room visits, psychiatric admissions, crime rates, or violent behavior. A 2013 meta-analysis of 37 studies published in the Journal of Emergency Medicine found "no significant relationship" between lunar phases and emergency department visits.

Myth 3: Supermoons Are Rare

Verdict: False. Supermoons occur 3–4 times per year on average. Because the Moon's perigee and the full moon cycle gradually drift in and out of alignment, there are always multiple supermoons in any given year. They are slightly less common than average full moons but far from rare.

Myth 4: The Moon Is Visibly Huge During a Supermoon

Verdict: Misleading. The supermoon is about 7% larger than an average full moon — a difference that is below the threshold of casual visual perception. The dramatic "huge moon" effect people report is almost always the moon illusion, which occurs with any moon near the horizon and has nothing to do with the Moon's distance.

Myth 5: Supermoons Cause Tsunamis

Verdict: False. Tsunamis are generated by sudden displacement of large volumes of water — typically by underwater earthquakes, volcanic eruptions, or landslides. The Moon's gravitational tidal forces are far too gentle to trigger such events. The 2011 Tōhoku tsunami, for example, occurred during a waxing crescent moon, not a supermoon.

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