Windmill Beach is one of the safer swimming spots along the False Bay coast due to its sheltered cove location between large boulders. The water is typically calmer than open beaches, though conditions vary with weather and tide. Water temperature in False Bay is warmer than the Atlantic (16-21°C). The protected nature makes it excellent for snorkeling, with rock pools and kelp beds hosting diverse marine life. However, be aware this is False Bay—great white sharks are present in the area. The beach's proximity to Boulders means African penguins sometimes swim nearby. Always supervise children, watch for currents, and check local conditions before entering.

Summer months (November-March) offer the warmest weather and calmest seas at Windmill Beach, making it ideal for swimming and snorkeling. The beach faces east, so morning sun is excellent while afternoons can become shaded by surrounding rocks and vegetation. For the best snorkeling visibility, visit during calm conditions at mid to high tide when water clarity improves. Weekdays are significantly quieter than weekends, offering a more peaceful experience. Early morning visits may reward you with penguin sightings. Winter months (June-August) can be beautiful but are generally too cold and rough for water activities, though the beach remains lovely for coastal walks.