Portsea Back Beach is an unpatrolled ocean beach with strong currents, rips, and powerful surf, making it dangerous for swimming. The beach faces Bass Strait and experiences unpredictable conditions. It's better suited for experienced surfers rather than casual swimmers. For safer swimming, head to nearby Portsea Front Beach on Port Phillip Bay, which has calmer waters. Always check local surf conditions, never swim alone, and stay within your abilities. If you do enter the water at Back Beach, extreme caution is essential.

Portsea Back Beach can be visited year-round, with each season offering different experiences. Summer (December-February) brings warm weather and is popular with surfers and beachgoers, though it can be crowded. Autumn and spring offer milder temperatures and fewer visitors, ideal for beach walks and scenic views. Winter attracts serious surfers seeking bigger swells. Mornings generally provide calmer conditions and beautiful light for photography. Note that the Mornington Peninsula enjoys a temperate climate, making beach visits pleasant throughout the year, though water temperatures are coolest in winter.

Portsea Back Beach is located at the southern tip of the Mornington Peninsula, approximately 95 kilometers from Melbourne. By car, take the Mornington Peninsula Freeway (M11) then follow signs to Portsea via Point Nepean Road. There's a car park at the end of London Bridge Road, which provides direct access to the beach. Parking is free but can fill quickly during summer weekends and holidays. Public transport options are limited; the nearest bus services run to Portsea township, requiring a walk to the beach.

Portsea township, just a few minutes' drive from Back Beach, offers various dining and accommodation options. You'll find cafes, restaurants, and a general store for supplies. The nearby Portsea Hotel is a popular venue for meals and drinks. Accommodation ranges from holiday rentals and beach houses to boutique stays, though booking ahead is essential during peak season. The beach itself has no facilities, so bring water and supplies. For a wider range of dining options, the towns of Sorrento and Rye are nearby along the peninsula.

Portsea Back Beach is renowned for consistent, powerful surf that attracts experienced surfers. The beach faces Bass Strait and picks up southern ocean swells, creating waves that can range from moderate to very large depending on conditions. It's a beach break with sandbars that shift seasonally. Winter typically brings the biggest swells, while summer offers more manageable waves. The surf can be challenging with strong currents and rips. This beach is recommended for intermediate to advanced surfers; beginners should seek coaching or choose calmer locations along the peninsula.