From Regional Park. Carry gear 100m through to beach. Good facilities at both beaches. Sail inside the bar at Omaha or out on the ocean beach. Sail out to the point break at Tawharanui.
Waves can get very powerful with mean beach breaks.
Inside the bar at Omaha, water is flat and tidal. A few rips - sail with someone. It is also usually available from most windsurfing shops around New Zealand.