Fly Sinking Rate Calculator

BETA

This calculator visualizes how your fly sinks through the water column over time, accounting for fly weight, length, tippet length, casting angle, water temperature and flow speed.

This tool is currently in beta. Calculations are based on theoretical models and may vary in real-world conditions.

Understanding the Sinking Rate Calculator

This calculator helps you predict how quickly your fly will sink based on its physical properties and water conditions. By understanding the sinking dynamics, you can make more informed decisions about fly selection and presentation techniques.

What This Calculator Shows

  • Effective Sinking Speed: How quickly your fly will descend through the water column (in meters per second)
  • Depth Over Time: Visual chart showing how deep your fly will be at different time intervals (5-60 seconds), capped at 10 meters
  • Casting Angle Impact: How your casting angle affects the penetration of your fly into the water
  • Tippet Length Effect: How your tippet length influences the drag on your fly

Improve Your Fishing

  • Precise Depth Control: Target specific water depths where fish are holding
  • Better Fly Selection: Compare patterns to find ones with ideal sink rates
  • Improved Presentation: Account for current speed to calculate the true sink path
  • Temperature Adaptation: Factor in how water temperature affects sinking performance

Application for Atlantic Salmon Fishing

For Atlantic salmon fishing, achieving the correct depth and drift is critical. Salmon often hold at specific depths depending on water temperature, light conditions, and river flow. This calculator helps you:

  • Calculate how far downstream your fly will travel while sinking to a specific depth
  • Adjust your cast position to ensure your fly reaches the desired depth at the right spot
  • Select flies with appropriate sink rates for different water conditions
  • Understand how temperature affects your fly's behavior throughout the seasons

By understanding these dynamics, you can dial in the perfect presentation to trigger more strikes, especially during challenging conditions when precise depth control makes all the difference.