How to Use a Storm Glass to Predict Weather
By Australian Geographic | Published: 2026-10-26
Category: How-to Guides
Learn how to read your Australian Geographic Storm Glass, interpret crystal formations, and combine it with other home weather tools for more accurate forecasts.
Quick answer
Place your storm glass in a spot with consistent indirect light and stable temperature, then observe the crystal patterns each morning. Combine readings with an indoor weather clock or outdoor thermometer for a more complete picture.
Understanding the storm glass
The Australian Geographic Storm Glass is a sealed glass vessel filled with a liquid that responds to atmospheric changes. As pressure and temperature shift, crystals form, dissolve, or change shape. It's not a precision instrument, but a beautiful way to notice weather trends.
For best results, place your storm glass on a desk or shelf away from direct sunlight, heaters, air conditioners, and drafts. Sudden indoor temperature changes can create misleading crystals.
Combining with other weather tools
A storm glass gives a general sense of coming weather, but it works best alongside other instruments. The Australian Geographic Indoor Weather Clock tracks temperature and humidity indoors, while the Australian Geographic Outdoor Thermometer gives you actual outdoor readings. Together, they help you confirm what the storm glass suggests.
For example, if your storm glass shows feathery crystals and the outdoor thermometer reads a dropping temperature, cooler or wetter weather is likely on the way.
How to read your storm glass
- 1. Place your storm glass correctly: Set it on a flat surface away from direct sunlight, heating vents, air conditioners, and windows. A desk or shelf in a room with stable temperature is ideal. Avoid moving it once placed; let it settle for 24 hours before reading.
- 2. Observe at the same time each day: Check your storm glass every morning before the room warms up. Note the crystal shape, size, and whether the liquid is clear or cloudy. Don't judge by a single glance; patterns over several days are more reliable.
- 3. Interpret common crystal patterns: Clear liquid usually means fair weather. Small scattered crystals can indicate colder or wetter conditions. Feathery or star-like crystals often precede rain or snow. Large flakes or clumps suggest overcast or stormy weather. These are general guidelines, not exact forecasts. Your storm glass is a trend indicator, not a replacement for a weather app.
- 4. Cross-check with other instruments: Compare your storm glass reading with the temperature and humidity on your Indoor Weather Clock and the outdoor temperature from your Outdoor Thermometer. Consistent patterns across tools are more trustworthy. If your storm glass shows storm crystals but the outdoor thermometer reads steady and warm, the change may be delayed or weaker.
- 5. Keep a simple log: Write down the date, crystal appearance, and actual weather that followed. Over a few weeks, you'll learn how your specific storm glass behaves in your local climate. A log turns guesswork into a personal reference guide for your home.
Recommended products
- Australian Geographic Storm Glass: The Australian Geographic Storm Glass forms beautiful crystalline patterns as atmospheric conditions change, offering a glimpse into upcoming weather. It turns weather observation into a daily ritual, making you more aware of subtle changes in your environment.
Australian Geographic Storm Glass - Australian Geographic Indoor Weather Clock: The Australian Geographic Indoor Weather Clock tracks time, temperature, and humidity at a glance with a natural bamboo-look finish. Use it to compare indoor conditions with your storm glass patterns, helping you separate room effects from real weather shifts.
Australian Geographic Indoor Weather Clock - Australian Geographic Outdoor Thermometer: The Australian Geographic Outdoor Thermometer is weather-resistant and provides reliable temperature readings through sun, rain, and cold. It gives you an actual outdoor temperature to cross-check against the storm glass, adding accuracy to your predictions.
