The Blue Moon: Spiritual Meaning and Rituals for the Rare Moon

The Blue Moon on May 31, 2026 is the second Full Moon in May. And, despite the name, the Moon won’t look blue. Unlike a Blood Moon, which actually does appear to turn red during the total Lunar Eclipse.

Blue Moons happen when there is either a second Full Moon in a month or when there are four Full Moons in a season. They occur about ever 29 to 33 months and, when they do, bring the Full Moon total to 13 instead of 12.

In May 2026, the Blue Moon is a monthly Blue Moon, as it is the second Full Moon of the month. The first was the Flower Moon on May 1.

When it comes to the Blue Moon’s spiritual meaning, the moon also carries that Full Moon energy of culmination and release. However, but some witches believe these moons are a good time to do magic or work with rituals where energy is otherwise difficult to access because of its rarity.

Blue Moons are also connected to the number 13, which is a number associated with the Divine Feminine. Though this isn’t the 13th moon of the year (that would be the December Moon), it also works as a time to do rituals connected to that energy.

In this guide, we’ll explore the spiritual meaning of the Blue Moon as well as share some rituals to help you work with its energy and help you understand what this rare Full Moon means for you.

What Is a Blue Moon?

A Blue Moon is a rare Full Moon. The phrase “once in a blue moon” refers to rarity, not color. The most common definition of a Blue Moon is that it is the second Full Moon in a single calendar month. Since the lunar cycle is about 29.5 days long, most months only have one Full Moon as you can see in our Full Moon Calendar.

But every so often, a Full Moon lands on the first of a month with 31 days, leaving enough time for another before the month ends. That’s exactly what happens in May 2026. The first Full Moon arrived on May 1, and the second Full Moon arrives on May 31. That second one is the Blue Moon.

When this happens, the Blue Moon results in 13 Full Moons for the year. But, on very rare occasions, about every 19 years, they bring the total to 14. The last time this happened was in 2018. The next time will be in 2037.

There are also seasonal Blue Moons. Those refer to the third Full Moon in an astronomical season that contains four Full Moons. The next seasonal Blue Moon is in May 2027.f

As you can see, like the Black Moon, which is when there’s a second New Moon in a month, there are a few definitions for a Blue Moon. It could be:

• The second Full Moon in a calendar month: This is the most common definition and happens about once every 29-30 months.
• The third Full Moon in a season with four total Full Moons: This seasonal Blue Moon occurs roughly every 33 months. The last one was on August 19, 2024 in the sign of Aquarius. The next one will be on May 20, 2027 in the sign of Libra.

What Is the Spiritual Meaning of the Blue Moon?

Spiritually, a Blue Moon carries all the energy of a Full Moon, but with an feeling sense of rarity and amplification for some.

Full Moons are the moon phase that connects with culmination, visibility, release, and emotional illumination. A Blue Moon adds the feeling of a second chance, a turning point, or an opportunity that doesn’t come around often. This makes it a great time to gather moon water so you can work with that energy without waiting two and half years for the next one.

A monthly Blue Moon also pushes the year’s Full Moon total from the usual 12 to 13, giving it an extra layer of lunar symbolism.

In many modern magical traditions, the number 13 is associated with the divine feminine, intuition, and mystery. Spiritually, this can make it a potent time to reconnect with your inner knowing and the parts of yourself that don’t operate on someone else’s timeline.

Because this is the second Full Moon of the month, it can also feel like a continuation of whatever surfaced earlier in May. The first Full Moon may have revealed the emotional material. The Blue Moon asks what you’re going to do with it.

After all, the May 31, 2026 Blue Moon also falls the sign of Sagittarius. And Sagittarius Full Moons can help you set intentions when it comes to freedom, travel, and your long-term visions.

However, the Sun is in Gemini. Gemini wants to ask questions, talk it out, and compare choices. Sagittarius wants to book the trip and get moving already. Sagittarius wants the map, the myth, the philosophy, the horizon. They want to do, not just think about what they should do. You might find some tension within yourself around that close to this moon.

This Blue New Moon invites you to:

• Release what has fully run its course
• Complete a cycle
• See the truth of a situation
• Make a big-picture decision
• Reconnect with intuition and divine feminine energy
• Name what you actually want next
• Do the thing that lights you up

Blue Moon Energy:

• Culmination
• Emotional clarity
• Releasing old beliefs
• Big-picture visioning
• Spiritual expansion
• Exploration
• Divine Feminine
• Long-term manifestation

Simple Blue Moon Rituals

1. Blue Moon Release Ritual

Write down one belief, pattern, relationship dynamic, or fear that you are ready to release. You can write down multiple things, but be specific. “I release self-doubt” is fine, but “I release the belief that I have to overwork to be safe” is much better. Read it aloud under the Full Moon. Then safely burn, tear and discard the paper in a bin.

2. Charge Your Magical Tools

Because the Blue Moon is a rare Full Moon, it’s a great time to charge crystals, tarot decks, jewelry, ritual tools, or anything you use regularly in your practice. Place your items somewhere they can be safely under the moonlight outside, or set them near a window the moon will pass by. If the weather is cloudy or stormy don’t stress. It’s your intention here that matters most.

3. Make Blue Moon Water

Fill a clean jar with water and place it under the Full Moon. You can add a label with your intention, such as clarity, truth, release, protection, or expansion. Gather it before dawn and pour it into an opaque container. Here’s our step-by-step guide to making moon water if you’ve never done it before.

Use Blue Moon water for cleansing your altar, anointing candles, adding to ritual baths, watering magical plants, or cleansing thresholds. Since this Blue Moon is in Sagittarius, it’s especially good for workings connected to confidence, travel, learning, spiritual growth, and big life decisions.

4. Write a Bigger Vision

Sagittarius energy does not want a five-point productivity plan written by your inner middle manager. It wants to feel the wind in its hair.

Write a vision for the next six months or year. Focus on direction. What are you moving toward? What would feel expansive? What adventure, project, or identity is calling you forward? Then choose one action you can take within the next week to honor that vision. If you need a journal for this, we have pretty ones in our shop.

Journal Prompts for the Blue Moon

Journaling is a great way to tap into the energy of the Moon. Here are some prompts to get you started.

• What has come full circle for me since the last Full Moon?
• What belief no longer fits the person I am becoming?
• Where am I craving more freedom?
• What am I ready to release before the next lunar cycle?
• What vision feels big, exciting, and slightly terrifying (in a good way)?

Blue Moon FAQ

Is the Blue Moon actually blue?

No. A Blue Moon usually does not appear blue. The name refers to rarity, not color. The Moon can sometimes look bluish because of atmospheric particles from smoke, dust, or volcanic activity, but that is separate from the lunar definition.

What sign is the May 2026 Blue Moon in?

The May 31, 2026 Blue Moon is in Sagittarius. Spiritually and astrologically, this emphasizes truth, freedom, expansion, belief, wisdom, travel, learning, and big-picture vision.

What rituals should I do for the Blue Moon?

Good Blue Moon rituals include release work, charging crystals and tarot decks, making moon water, doing divination, writing a long-term vision, releasing old beliefs, and performing gratitude rituals.

Is a Blue Moon good for manifestation?

It can be. But this work is best suited for New Moons. The next new Moon is on June 14th in the sign of Gemini., Use the Full Moon to release what blocks your manifestation, celebrate what has grown, and be intentional about what you want to expand next.