A current in a fluid is the magnitude and direction of flow within each portion of that fluid, such as a liquid or a gas.

Types of fluid currents include:

• Air current
• Water current
  • Current (hydrology), a current in a river or stream
  • Ocean current
    • Longshore current
    • Boundary current
    • Rip current
    • Rip tide
    • Subsurface currents
      • Turbidity current
    • Tidal current