Updated: July 7, 2025

Fishing spiders, belonging to the genus Dolomedes, are fascinating arachnids known for their semi-aquatic lifestyle and impressive hunting skills. While they play an important role in controlling insect populations, many people prefer not to have these large spiders lurking around their homes, gardens, or fishing spots. If you’re looking for ways to keep fishing spiders away without resorting to harsh chemicals or poisons, natural repellents offer a safe and effective solution.

In this article, we’ll explore what fishing spiders are, why you might want to deter them, and most importantly, the best natural repellents and strategies to keep them at bay.

Understanding Fishing Spiders

Fishing spiders are typically found near water bodies such as ponds, streams, and lakes. They are known for their ability to walk on water surfaces and even dive underwater to catch prey. These spiders can grow quite large, with leg spans reaching up to 3-4 inches, which can be intimidating to those unfamiliar with them.

Despite their size and somewhat fearsome appearance, fishing spiders rarely bite humans unless provoked. They feed primarily on insects and small aquatic animals like fish and tadpoles. However, because of their proximity to water sources where people often relax or fish, some homeowners and anglers seek ways to discourage fishing spiders from settling nearby.

Why Use Natural Repellents?

Chemical pesticides may offer quick results but come with risks such as environmental harm, toxicity to pets and beneficial insects, and potential health issues for humans. Natural repellents provide a safer alternative by using substances that discourage spiders without killing them or damaging the ecosystem.

Natural repellents typically work by creating an environment that spiders find unpleasant or confusing. These methods can be just as effective when used consistently and combined with good habitat management.

Effective Natural Repellents for Fishing Spiders

1. Essential Oils

Many essential oils have aromatic compounds that spiders find repellent. Using these oils near entry points or in areas where fishing spiders are common can help keep them away.

  • Peppermint Oil: One of the most popular spider repellents, peppermint oil has a strong scent that fishing spiders dislike. Mix 10-15 drops of peppermint oil with water in a spray bottle and apply around windowsills, door frames, patios, and near bodies of water.

  • Eucalyptus Oil: This oil has a fresh smell that spiders tend to avoid. Use it in a similar way as peppermint oil for effective deterrence.

  • Lavender Oil: While pleasant to humans, lavender oil can repel spiders due to its chemical makeup. Spray diluted lavender oil in infested areas.

  • Tea Tree Oil: Known for its antifungal properties, tea tree oil is also an effective spider deterrent when diluted with water.

When using essential oils, always dilute them properly (usually about 10-15 drops per cup of water) before spraying. Reapply sprays every few days or after rain if used outdoors.

2. Vinegar Solution

White vinegar is acidic and has a strong smell that many pests avoid. Mix equal parts white vinegar and water in a spray bottle and apply around doorways, window frames, basements, sheds, and other suspected fishing spider habitats.

Be cautious when spraying vinegar near plants as it can damage some foliage. Use targeted sprays rather than wide-area applications.

3. Citrus Peels

Spiders dislike the scent of citrus fruits such as lemons, oranges, and limes. Placing fresh citrus peels around your garden or home exterior can help repel fishing spiders naturally.

You can also make a citrus spray by boiling peels in water for about 20 minutes, then straining the liquid into a spray bottle once cooled. Spray this mixture around spider-prone areas for ongoing protection.

4. Diatomaceous Earth (Food Grade)

Diatomaceous earth is a natural powder made from fossilized remains of tiny aquatic organisms called diatoms. When sprinkled around the perimeter of your home or garden beds near water bodies, it acts as a mechanical deterrent by damaging the exoskeletons of insects and spiders upon contact.

Food-grade diatomaceous earth is safe for pets and humans but should be kept dry for effectiveness. Avoid inhaling the dust during application.

5. Cedarwood

Cedarwood chips or blocks have been used traditionally as natural insect repellents due to their aromatic oils that deter many bugs including spiders.

Place cedarwood chips in garden beds or near shed entrances where fishing spiders are likely to appear. Alternatively, use cedarwood oil diluted with water as a spray repellent.

6. Garlic

Garlic contains sulfur compounds that many pests find unpleasant. Crush garlic cloves and steep them in water overnight; strain and spray this garlic solution around areas where fishing spiders gather.

Alternatively, plant garlic bulbs around your garden perimeter as a living repellent.

Habitat Management Tips to Discourage Fishing Spiders

In addition to using natural repellents directly on or near your home or garden area, modifying the environment can greatly reduce the likelihood of fishing spider infestations:

  • Remove Excess Debris: Clear away leaf litter, grass clippings, wood piles, and other debris that provide hiding places for fishing spiders during the daytime.

  • Trim Vegetation Near Water: Fishing spiders often hunt near tall grass or overgrown plants adjacent to ponds or streams. Keeping vegetation trimmed reduces cover where they can ambush prey—and hide from you.

  • Reduce Outdoor Lighting: Outdoor lights attract insects which in turn attract spiders hunting nearby. Minimizing outdoor lighting at night helps reduce food availability for fishing spiders close to your home.

  • Seal Entry Points: Prevent indoor encounters by sealing cracks around windows, doors, foundation walls, and vents where spiders could enter seeking shelter.

  • Install Screens: Use screens on windows and doors facing water sources to create physical barriers against spider intrusion.

Additional Natural Methods

Introduce Predators

Certain animals prey on fishing spiders naturally:

  • Birds such as wrens and sparrows
  • Frogs and toads
  • Larger predatory insects like praying mantises

Encouraging wildlife-friendly habitats by installing birdhouses or maintaining small ponds can help keep spider populations balanced naturally without direct intervention.

Use Sticky Barriers

Sticky traps placed strategically around garden edges near water access points can catch wandering fishing spiders before they reach living spaces. Choose eco-friendly traps without harmful chemicals if possible.

When to Seek Professional Help

Natural repellents are usually sufficient for moderate fishing spider control but if you experience large infestations causing distress or safety concerns—especially indoors—consult pest control professionals who use integrated pest management (IPM) techniques prioritizing minimal environmental impact.

Final Thoughts

Fishing spiders are an important part of aquatic ecosystems but understandably unwelcome close to human dwellings or recreational spots. Natural repellents like essential oils, vinegar sprays, citrus peels, diatomaceous earth, cedarwood, and garlic provide safe ways to discourage their presence while protecting beneficial insects and pets.

Combine these repellents with habitat management practices such as debris removal and sealing entry points for optimal results without harming the environment. With consistent effort using these natural strategies, you can enjoy your outdoor spaces free from unwanted spider visitors while maintaining ecological balance.


By choosing natural solutions over synthetic chemicals you not only protect your family’s health but also promote sustainable pest management practices that conserve biodiversity in your local environment. Start with one or more of these natural repellents today to keep fishing spiders at bay safely!