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 (島島) is an island with cold climate. On Winter Islands even in the summer snow is normally seen.
 * Drum Island
 * Karakuri
 * Yukiryuu Island (in New World)
 * Unknown island belonging to Kaido (in New World)
 * Hyoukaidou (anime only)

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

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

Fall Island
A Fall Island (秋島) has yet to appear in the series.

Special cases

 * Rusukaina is a forty-eight season island whose climate changes every week.

Trivia

 * The route that the Straw Hat Pirates are on seems, according to the second to fifth island they land on, to be following a seasonal pattern. Drum Island was a Winter island, followed by Little Garden (Spring), then Arabasta (Summer), and finally Jaya (Autumn). According to this pattern, Whiskey Peak would be an Autumn Island, and Water 7 would be Winter; however these are unconfirmed. Enies Lobby, Amazon Lily, Impel Down, and Marineford are not included in this pattern as the Straw Hats went to these by means other than the Log Pose directions, while Sabaody Archipelago is not considered an island, but a formation of Yarukiman Mangrove. By these standards it may be assumed that Fishman Island will be a Spring Island.