Homemade Watermelon Soap: Easy DIY Recipe For All Skin Types

By : Deepak Bhagat

Last updated on: August 27, 2025

Daily colourful fruity soaps in our skin routines are nothing short of magic. Their great refreshing scent takes one on an engaging sensory experience.

The essence of summer being laid in a pool of soap-watermelon soap shows the beauty of making it at home.

Fun, a natural approach, and surprisingly good for skin lightening, this guide should take you through a variety of methods, recipes, ingredients, and benefits for skin involved in making watermelon-based soap from home.

What is Watermelon Soap?

Watermelon soap can then be said to be a soap either scented with watermelon fragrance, or with juice from watermelon, or one that looks like a watermelon slice; a great natural and skin-friendly option if done at home.

Artisans may use watermelon fragrance oil, extract, or even purée to get the effect desired-a refreshing aromatised cleansing experience.

Why Make Your Watermelon Soap?

DIY watermelon soap-making is a fun activity and has many advantages compared to store-bought soaps.

1. Control Over Ingredients (No Parabens, SLS, Synthetic Dyes)

You make your soap, so you can control what goes into it. It's an opportunity to kick the skin-irritant chemical parabens, sodium lauryl sulfate (SLS), and synthetic dyes.

2. Customisable Design, Scent, And Skin Benefits

You can use your creativity when making soap. You may try to do a watermelon slice design, vary the strength of the fragrance, and add ingredients specifically designed for your skin requirements.

3. Suitable For All Skin Types (Especially in Summer)

Watermelon soap is known to be mildly hydrating, but rest informs us that it should fit generally well with all skin types.

4. Cost-Effective & Eco-Conscious

Bulk soap making is cost-effective in the long run. In doing so, you cut waste from packing; hence, going green.

5. Great Gifting Option For Summer

Summer gifts are fun and aesthetic for friends and family when it comes to homemade creations of watermelon soaps.

Benefits of Watermelon For Skin

Besides being an extraordinary delight in summer, this juicy fruit brings many benefits for your skin.

1. Hydration Boost Due to Water-Rich Content

Abrasive 92% of water composition renders watermelon as a natural moisturiser that helps hydrate and gives the skin a glow.

2. Rich in Vitamin C, A, And Antioxidants

Watermelon is rich in Vitamin C for collagen formation and Vitamin K for skin repair, along with an ample amount of antioxidants such as lycopene and polyphenols.

3. Soothes And Calms Irritated Skin

With anti-inflammation, old watermelon remedies are used to heal irritated skin with sunburns.

4. Fights Free Radicals And Supports Youthful Skin

Antioxidants in watermelon help to protect skin against environmental aggressors and free radicals that account for early signs of ageing.

5. Naturally Refreshing And Non-Greasy

Watermelon extracts help refresh the skin and balance oiliness without leaving greasiness.

Homemade Watermelon Soap Recipe

Here is a simple melt-and-pour recipe that will kick-start your soap-making journey.

Ingredients

1 lb - glycerin soap base
10 ounces - glycerin soap base (for the green layer)
1 cup - goat's milk soap base (for the white layer)
1/2 teaspoon - green soap pigment
2-3 drops - red or pink soap colourant
15 drops - watermelon fragrance oil
2 tablespoons - poppy seeds (optional, for "seeds")

How to Make

Green Layer: Melt 10 ounces of glycerin soap for the green layer in a microwave-safe bowl. Heat it for 30 seconds and stir. Repeat until fully melted, then add the green pigment and pour into the soap mould. Allow it to set.
White Layer: Melt goat milk soap base and pour it over the already set green layer. Allow this layer to be placed as well.
Red Layer: Melt 1 lb of glycerin soap base. Add the watermelon fragrance oil and red colourant and mix well. You can also add poppy seeds at this point.
Final Pour: Pour the red soap mix over the already set white layer up to the brim of the mould.
Set and Unmold: Leave the soap to set for a few hours before unmolding.

Avoid These Common Mistakes While Making Soap

Things that could ruin your hard work include these common mistakes made in soap-making. Be wary of:

1. Using Fresh Watermelon in Melt & Pour Soap

Fresh juice or purée can spoil or cause mould growth in your soap.
Melt and pour soap bases don't have preservatives that can combat the bacteria brought in by fresh ingredients.

2. Adding Too Much Fragrance Oil

Too much fragrance oil could irritate the skin.
Always stick to the recommended percentages for soap making, which is usually around 3-5%.

3. Incorrect Layering of Colours

Applying the next layer before the previous one has set enough would produce bleeding colours.
It may ruin the distinct look of watermelon that you are trying to achieve.

4. Using Non-Skin Safe Colourants

Food colouring is not so great for soap because it may stain the skin and just fade away with time.
Go for soap-safe micas or natural clays for brilliant and skin-safe results.

Avoid These Common Mistakes While Making Soap

5. Skipping Safety Gear in Cold Process Method

If we are working with lye or sodium hydroxide while making cold-process soap, please ensure that gloves and goggles are put on.
The wrong mixing of lye and water leads to poisonous fumes and chemical burns.

6. Adding Watermelon Purée at the Wrong Time (Cold Process)

The sugar level in fruit purée can speed up the soap-making process by making the mixture too thick very quickly.
It is best to keep the amount to a minimum and add the purée at a light to medium trace, so the texture of the soap won't be affected.

7. Not Letting the Soap Cure Properly (Cold Process)

Using cold-process soap before it has properly cured can lead to skin irritation and a soft, floppy bar.
The curing of such soap requires about 4-6 weeks for it to become a hard bar, long-lasting, and mild in use.

8. Pouring Melted Soap Too Hot

Overheated melt and pour soap base can even evaporate the fragrance of your oils, and will melt even the details of your soap mould.
Allow the base to cool to around 120–130°F, then add fragrance and pour.

9. Not Testing the Soap on Skin First

Always patch test a soap on a small area of skin before regular use of the new soap.
This is particularly critical for anyone with sensitive skin or when trying out new ingredients or essential oils.

Conclusion

One of the best ways to enjoy a creative hobby while learning about some natural, skin-loving ingredients is to create your very own DIY watermelon soap.

Here is a product that will not only be good to look at, as well as smell good, but also be tailored towards your personal skin care preferences.

So, go ahead and try the recipe, play around with your variations, and relish that lovely summer fragrance in your very own handmade soap.

We would love to see your creations, so feel free to send us your comments or pictures.