Lord Howe Island in November

September through April gives you the warmest weather and calmest seas. Water temperature peaks at 24°C in February and March — perfect for extended snorkeling sessions. But this is also peak season, so book accommodation at least six months ahead. May through August brings cooler temperatures (18-22°C) and stronger trade winds. The upside? Fewer crowds and lower accommodation rates. You can still snorkel, but you'll want a wetsuit. This is actually the best time for hiking Mount Gower since the cooler weather makes the steep climb more bearable. Avoid visiting during school holidays if possible. Australian families flood the island during these periods, and the limited accommodation fills up fast. The island also closes to new bookings during certain conservation periods when seabirds are nesting.