Island Climatic Types

There are four climatic types of islands in the Grand Line: Winter Islands, Summer Islands, Spring Islands, and Fall Islands. Each of these islands have their own seasons according to their namesakes, and will not change throughout the entire year. The Red Line is composed of such islands grouped together.

Winter Island
A Winter Island (冬島) is an island with cold climate. On Winter Islands even in the summer snow is normally seen.
 * Drum Island
 * Karakuri
 * Yukiryu Island
 * Unknown island belonging to Kaido (in New World)

Spring Island
A Spring Island (春島) is blooming with plant life and has nice warm weather.
 * Jaya
 * Unknown island where the On Air Pirates are (in New World)

Summer Island
A Summer Island (夏島) has hot and dry climate.
 * Alabasta

Fall Island
A Fall Island (秋島) has yet to appear in the series, although according to Nico Robin, the island that comes after Alabasta is an Autumn Island.

Special cases

 * The Red Line, according to Nami, are several islands linked together, each with it's own climatic zone.
 * Rusukaina is a forty-eight season island whose climate changes every week.