How Does Weather Affect the Reliability of a Bowline Knot?

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Weather Conditions Affecting the Bowline Knot Moisture and Humidity Moisture in the air can weaken the bowline knot by making the cordage fibers swell and become less stable. In humid environments, the minimum recommended tension for a bowline knot is 10-15% higher than in dry conditions to compensate for fiber relaxation. Aim for a minimum of 10-15 pounds of force to secure the knot in humid conditions.
Wind and Currents Wind and strong currents can put additional stress on the bowline knot, potentially causing it to slip or come undone. In such situations, consider adding a security knot like the double bowline or a figure-eight knot above the bowline to further secure the load. Use a minimum of 20-25 pounds of force to set the knot in high-wind conditions.
Temperature Extremes Extreme temperatures can also affect the bowline knot’s reliability. In freezing temperatures, cordage fibers can become brittle and prone to breakage. In such cases, use a minimum of 15-20 pounds of force to set the knot and consider using a lubricant to reduce friction and prevent knot slip. In hot temperatures, cordage fibers can become over-relaxed, causing the knot to slip. Use a minimum of 10-15 pounds of force to set the knot and consider adding a backup knot.