Astrology Forecast for December 15-21, 2025

Note: the dates in this forecast are for Pacific to Eastern time.
Unless I provide a specific timeframe, we’ll feel the energies 24-72 hours before the date I mention (the date when the planetary alignment is exact).
They’ll gain strength as they approach, and linger for 24–48 hours after, gradually fading with each passing hour.
💫 Executive Summary
This week, Mars moves into Capricorn, and the Sun and Venus in Sagittarius don't get along with Saturn and Neptune. The week can have some grumpy moments. Feelings of loneliness can surface throughout the week,
Thankfully, the New Moon in Sagittarius is also this week - an excellent time to ask the Universe for joy if your life has been lackluster lately.
To make the best of this week:
- ⚠️Don't challenge your boss on Tuesday; you're unlikely to win. The Sun and Saturn are butting heads.
- Do some decluttering on Wednesday or Thursday. The Moon is Balsamic - inauspicious for new beginnings - but it's a great time to create more energetic space for fresh energies of the new year.
- 🌑 Friday evening (Pacific to Eastern time), ask the Universe for a boost of optimism, adventure and luck in your life on a New Moon in Sagittarius. This New Moon squares Neptune and Saturn, so it can bring a reality check. But still, it's a good New Moon to set your intentions for what you want to attract into your life.
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⚠️ The weekend is NOT good timing for a first date: Venus is square Saturn and getting ready to square Neptune, and that repressive energy might colour your relationship. Don't overdo on festive martinis if you're going to a holiday party. The Sun is square Neptune, which can increase sensitivity to drugs and alcohol (including prescription drugs).
- Sunday hosts the winter solstice. Happy Birthday to all of you Capricorns!
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Key Astro-Happenings This Week:
✨ December 15: Mars enters Capricorn
Mars moves from fun-loving Sagittarius into business-minded Capricorn on Monday, shifting the focus from socializing to work and career - which could be a good thing! It would help you pay for all those Christmas presents 😀
Mars will stay in Capricorn until January 23, 2026.
✨ December 16: the Sun Square Saturn
A challenging energy that can bring out feelings of inadequacy.
Best for:
- Reframing obstacles as teachers. What if delays are opportunities to refine your path?
- Challenging self-limiting beliefs. What and who makes you feel inadequate, when, and and why?
- Exploring where fear of failure OR success is holding you back.
Avoid:
- Challenging your boss or other authority figures in your life. It'll be difficult to win...
- Interviews or important meetings where you need to put your best foot forward.
🌘 December 16, 5:43 p.m. to December 19, 5:43 p.m.: Balsamic Moon
If you're attuned to the Lunar Cycle, you may feel that your energy is lower in the days leading to the New Moon. Build in an extra hour of sleep if you can (easier said than done, I know! 😔)
Best for:
- Tying loose ends
- Decluttering
- Recharging.
Create some energetic space in your life and your home, to welcome new beginnings on the upcoming New Moon.
Avoid:
- Initiating important undertakings - Balsamic Moon is inauspicious for new beginnings.
🌑 December 19, 5:43 p.m.: New Moon in Sagittarius
This New Moon is THE day of the year to let the Universe know that you're ready for a boost of optimism, adventure and luck in your life. It's also a great New Moon to ask for success with publishing, being able to freely speak your truth, and to travel or relocate to another country.
You're not limited to these topics. Setting intentions for anything you want to attract into your life is fair game. But, intentions for the matters ruled by Sagittarius get an extra boost.
Read more here.
⚠️ December 20: the Sun Squares Neptune; Venus squares Saturn.
These squares are challenging, but luckily their effects won't be long-lasting. Note that Venus will move on to making a square with Neptune early next week. The weekend is not ideal for a first date.Avoid:
- First dates - wait until mid-week next week.
- Excessive alcohol or drug consumption
- If your immune system is not at its strongest, stay away from crowded spaces with poor ventilation today. The Sun-Neptune square increases your chances of catching a cold.
♑ December 21: the Sun enters Capricorn
Happy Birthday to my Capricorn readers! Happy Solstice!
🕰️ Moon Void of Course
Avoid starting anything new you want to succeed during these periods:
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December 17, 7:24 a.m. to 8:38 a.m. PST
- December 19, 7:41 p.m. to 8:53 p.m. PST
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