How Do I Keep Moisture Out of My Boat?

Boating is a delightful pastime, but it comes with its fair share of challenges. One such challenge that can wreak havoc on your boat is moisture.

Excessive moisture can lead to mold growth, wood rot, and corrosion. To ensure the longevity of your boat and maintain its pristine condition, it is crucial to keep moisture out. In this article, we will explore some effective strategies to combat moisture and protect your beloved vessel.

1. Proper Ventilation

One of the primary causes of moisture buildup in boats is inadequate ventilation.

When warm air collides with cold surfaces, condensation occurs, creating a breeding ground for moisture-related issues. To prevent this from happening, ensure that your boat has proper ventilation.


  • Install Vents: Install vents in strategic locations throughout your boat to promote airflow.
  • Open Windows and Hatches: Whenever possible, open windows and hatches to allow fresh air to circulate.
  • Use Dehumidifiers: Consider using dehumidifiers to extract excess moisture from the air inside your boat.

2. Seal Leaks

If there are leaks in your boat, they can introduce unwanted moisture. Inspect your boat regularly and seal any visible leaks promptly.


  • Caulking: Use marine-grade caulking to seal gaps or cracks in windows, hatches, or any areas prone to leakage.
  • Bilge Pump Maintenance: Ensure that your bilge pump is functioning correctly and free from leaks.

3. Proper Storage

When it comes to boat storage, following proper procedures can significantly help in keeping moisture at bay.


  • Choose a Dry Storage Location: Opt for a dry storage location such as a covered boathouse or indoor storage facility.
  • Elevate Your Boat: If storing your boat on a trailer, consider elevating it slightly to allow air circulation and prevent water accumulation.
  • Use Moisture Absorbers: Place moisture-absorbing products like desiccant bags or dehumidifier crystals inside your boat to absorb excess moisture.

4. Regular Maintenance

Maintaining your boat regularly is essential to prevent moisture-related issues.


  • Clean and Dry: After each use, thoroughly clean and dry your boat, paying extra attention to areas prone to moisture buildup.
  • Inspect Canvas and Upholstery: Check your boat’s canvas covers and upholstery for signs of mold or mildew. Clean them promptly if necessary.
  • Treat Wood Surfaces: If your boat has wooden surfaces, apply appropriate sealants or varnishes to protect them from moisture damage.

5. Monitor Humidity Levels

Leveraging technology can help you monitor the humidity levels inside your boat effectively.


  • Digital Hygrometer: Invest in a digital hygrometer to measure the humidity levels inside your boat accurately.
  • Set Optimal Humidity: Maintain the humidity levels between 40% and 50% to prevent excessive moisture buildup.

By implementing these strategies, you can significantly reduce moisture-related problems and keep your boat in excellent condition. Remember, regular maintenance and vigilance are key to ensuring that moisture stays out of your beloved vessel.

Photo of author

Daniel Bennet