The best time to go to Portsea is during the summer months, from December to February, when the weather is warm and sunny, great for enjoying the beaches and outdoor activities.
During this period, you can expect average temperatures ranging from 20°C to 25°C, with plenty of sunshine. This makes it ideal for swimming, sunbathing, and exploring the Portsea coastline. The town is at its most active, with many shops, cafes, and restaurants open and a lively, yet relaxed, atmosphere, appealing to couples and families looking for a classic Australian beach holiday.
If you prefer a quieter experience with pleasant weather, the shoulder seasons of autumn (March to May) and spring (September to November) are also excellent. Temperatures are milder, typically between 15°C and 20°C, making it comfortable for coastal walks, golf, and exploring the Mornington Peninsula without the peak summer crowds.