Temperature - The higher the temperature, the faster the movement of water molecules across the semi permeable membrane.
Surface Area - The larger the surface area, the more space for the molecules to move easily across; the smaller the area, the more restricted the movements of the molecules and the slower the movement.
Difference in Water Potential – The higher the difference in water potential, the faster the osmosis; for the lesser water molecules are in the region of low concentration, more water molecules from the region of higher concentration can enter faster and easier.
Pressure – The more the pressure, the faster the molecules will move for they are being pushed faster across a low concentration.
Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent.