Rainfall is seasonal, with about 180 mm in June and July, and 120 mm in the summer months. Most rainfall occurs as moderate to heavy showers and not continuous rain, but winter frontal systems can bring rain bands that may last for a day or more. The summers are actually drier than the statistics indicate, because some years bring erratic tropical lows that can boost the average figures by up to 300mm in a month, other years 5mm a month may occur. 

Winds are generally west to southwest in winter, and east to southeast in summer months. The island is too far south to experience cyclones, but remnant cyclones that decrease to tropical lows can pass over the island and bring strong winds. Each winter several episodes of gale force winds (over 33 knots) can affect the island as east coast lows move across the Tasman Sea. 



Water temperatures around the Island vary from a low of 17°C in August to 25°C in March, although the lagoon can be warmer on sunny days. Generally, conditions are mild enough to enjoy swimming between the months of November and May.