Island Climatic Types



There are four climatic types of islands in the Grand Line: Winter Islands, Summer Islands, Spring Islands, and Autumn Islands. Each of these islands have a climate similar to their namesake season year round.

Overview
In the Grand Line, many islands are in a constant state of one particular season. There are still different seasons on each island, ranging from Summer Island summer to Winter Island winter, with the weather in each season dependent on the type of island.

The climatic type of an island is reflected upon the sea which surrounds the island itself; for example, the sea surrounding a winter island will have snow fall. This means that if the weather suddenly becomes stable during a sea voyage, then there is most likely an island in proximity. Between the islands, the conflicting climate types will cause severe weather that is inconsistent and unpredictable. A particular case of this phenomenon is the immediate starting point of the Grand Line after the Twin Cape, as the influence of the climatic zones and magnetic fields of the first seven islands of Paradise make the weather in the seas in-between them chaotic.

In the New World, the island climactic zones are seemingly even more intense and erratic, to the point that an island's magnetic field may randomly disappear due to a powerful weather anomaly. This makes navigation with a traditional single-needle Log Pose impractical.

Winter Island
A Winter Island (冬島) is an island with cold, wintery climate. On winter islands, snow is normally seen, even in the summer.
 * Drum Island
 * Karakuri Island
 * Yukiryu Island
 * Egghead
 * Unnamed island belonging to Kaidou (in the New World).

Spring Island
A Spring Island (春島) is an island blooming with plant life and has nice warm weather.
 * Jaya
 * Dressrosa
 * Green Bit
 * Unnamed island where the On Air Pirates were last seen (in the New World).

Summer Island
A Summer Island (夏島) is an island that has a hot and dry climate.
 * Sandy Island
 * Mecha Island

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

Special Cases



 * The Red Line, according to Nami, is composed of several islands linked together, each with its own climatic zone.
 * Rusukaina is a forty-eight season island whose climate changes almost once every week.
 * Little Garden is a prehistoric island displaying an extreme jungle climate and where dinosaurs and other prehistoric beasts are not extinct.
 * Raijin Island is an island where lightning falls the same way rain does.
 * Enies Lobby is an island where it is always daytime.
 * Wano Country is divided into different regions, separated by rivers, each with its own unique climate.
 * Ringo has a climate characteristic of winter islands, with a lot of snow.
 * Hakumai has a climate characteristic of autumn islands, with loads of falling leaves.
 * Onigashima has a stormy climate with characteristics of winter at the entrance of the island.
 * Punk Hazard is split into two zones with two different climates, one half being a frozen wasteland, the other being a volcanic inferno. However, this was actually the result of a battle between two Logia Devil Fruit users, Sakazuki and Kuzan.
 * Thanks to a special air-conditioning system developed by Dr. Vegapunk, the winter island of Egghead features a tropical climate more akin to summer islands (although its surrounding seas remain naturally icy and windy).

Trivia

 * Every Straw Hat pirate has a favorite island-season combination of their own (sans Luffy and Sanji), matching their general personality and interests.
 * Zoro favors Autumn Islands with an Autumn climate for training.
 * Both Nami and Franky favor Spring Islands with a Summer climate for beach activities.
 * Usopp favors Autumn Islands with a Summer climate due to being ideal for fishing and weapons development.
 * Chopper favors Winter Islands with a Spring climate due to not dealing well with heat.
 * Both Nico Robin and Brook favor Spring Islands with an Autumn climate. In Robin's case, it is for relaxation and reading purposes.
 * Jinbe favors Summer Islands with an Autumn climate.

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