A candle making thermometer is one of the cheapest tools you can buy — and one of the most important. Pouring wax at the wrong temperature is the number one cause of sinkholes, poor scent throw, wet spots, and frosting. A decent thermometer eliminates the guesswork and makes your candles better from the very first batch.
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We’ve reviewed the most popular candle making thermometers available on Amazon UK. Whether you want a simple dial thermometer or a digital probe, here are our top picks.
Why You Need a Thermometer for Candle Making
Every step of candle making involves temperature. You need to know when your wax is fully melted (80–85°C for soy wax), when to add fragrance oil (60–65°C), and when to pour (55–60°C). Getting these wrong by even 5–10 degrees can cause problems.
Adding fragrance to wax that’s too hot causes the scent to evaporate — giving you a candle with weak hot throw. Pouring too hot creates sinkholes and air pockets. Pouring too cold gives you a rough, uneven surface. A thermometer solves all of these issues. For the full process, see our beginner’s candle making guide.
Types of Candle Making Thermometers
Dial thermometers are the traditional choice. They have a stainless steel probe and an analogue dial that displays the temperature. Most come with a clip that attaches to the side of your melting pot or jug, so you can monitor the temperature hands-free. They’re affordable, reliable, and don’t need batteries.
Digital thermometers give you a precise numerical reading on an LCD screen. They respond faster to temperature changes and are easier to read at a glance. Some kitchen thermometers work perfectly for candle making — you don’t need a specialist tool.
Infrared (non-contact) thermometers measure surface temperature from a distance. They’re quick and convenient but measure the surface of the wax rather than the internal temperature, which can be slightly less accurate for candle making purposes.
For most candle makers, a dial thermometer with a clip is the best option. It’s always in the pot, always visible, and requires zero maintenance.
Our Top Picks
1. Thermometer World Candle Making Thermometer (300mm) — Best Overall
This is the thermometer we recommend for most candle makers. The 300mm probe is long enough to reach well into a deep melting pot or double boiler, and the clip holds securely to the side of your jug. The dial is clear and easy to read, showing both Celsius and Fahrenheit.
It’s specifically designed for candle making (not just repurposed from cooking), which means the temperature range is optimised for wax melting rather than high-heat cooking. Accurate, affordable, and built to last.
View the 300mm Candle Making Thermometer on Amazon →
2. Thermometer World Candle Making Thermometer (175mm) — Best Compact Option
If you’re working with a small pouring jug or a compact wax melter, the 175mm version is more practical. It has the same clear dial and pan clip design as the 300mm model, just in a shorter format. The temperature range covers -18°C to +104°C, which comfortably spans everything you need for candle making.
This is a great choice if you’re using an electric wax melter where a full-length probe isn’t necessary.
View the 175mm Candle Making Thermometer on Amazon →
Key Temperatures to Remember
Here’s a quick reference for the temperatures you’ll use most often with soy wax (the most popular choice for beginners — see our soy candle guide for more detail):
80–85°C: Fully melt soy wax. Stir occasionally until all flakes are dissolved and the wax is completely liquid and clear.
60–65°C: Add fragrance oil. This temperature allows the fragrance to bind properly with the wax without evaporating. Stir for two full minutes.
55–60°C: Pour into containers. This cooler pouring temperature minimises sinkholes and gives a smoother finish.
Note: Beeswax melts at a higher temperature (around 62–64°C) and needs to be heated to approximately 70–75°C for working. Paraffin wax varies by type but generally melts between 46–68°C. Always check the manufacturer’s recommendations for your specific wax.
Do You Need a Thermometer if You Have an Electric Wax Melter?
Many electric wax melters (like the Ksedcon or Bare Botanics) have built-in temperature displays. If yours does, you may not need a separate thermometer for the melting stage. However, a handheld thermometer is still useful for checking the temperature after you’ve removed the wax from the melter and transferred it to a pouring jug — the wax cools quickly once removed from the heat source.
For the full list of recommended tools, visit our tools and equipment shop. And if you’re just getting started, our best candle making kits UK guide reviews starter sets that include a thermometer.
