Oceanic climate

World map showing oceanic climate zones

An oceanic climate, also known as a marine or maritime climate, is the Köppen classification of climate typical of west coasts in higher middle latitudes of continents, and generally features mild summers (relative to their latitude) and mild winters, with a relatively narrow annual temperature range and few extremes of temperature, with the exception for transitional areas to continental, subarctic and highland climates. Oceanic climates are defined as having a monthly mean temperature below 22 °C (72 °F) in the warmest month, and above 0 °C (32 °F) (or −3 °C (27 °F)) in the coldest month.

It typically lacks a dry season, as precipitation is more evenly dispersed throughout the year. It is the predominant climate type across much of Western Europe including the United Kingdom, the Pacific Northwest region of the United States and Canada, portions of central Mexico, southwestern South America, southeastern Australia, including Tasmania, New Zealand as well as isolated locations elsewhere. Oceanic climates are generally characterised by a narrower annual range of temperatures than in other places at a comparable latitude, and generally do not have the extremely dry summers of Mediterranean climates or the hot summers of humid subtropical.[1] Oceanic climates are most dominant in Europe, where they spread much farther inland than in other continents.[2]

Oceanic climates can have considerable storm activity as they are located in the belt of the stormy westerlies. Many oceanic climates have frequent cloudy or overcast conditions due to the near constant storms and lows tracking over or near them. The annual range of temperatures is smaller than typical climates at these latitudes due to the constant stable marine air masses that pass through oceanic climates, which lack both very warm and very cool fronts.


Precipitation in an oceanic climate must have at least 40 millimeters per month. All months must have adequate rain and cloudy conditions are common in oceanic climates. London is an example of an oceanic climate. It experiences reliable and constant precipitation throughout the entire year. Despite this, thunderstorms are quite rare since hot and cold air masses meet infrequently in the region. In most areas with an oceanic climate, precipitation comes in the form of rain for the majority of the year. However, some areas with this climate see some snowfall annually during winter. Most oceanic climate zones, or at least a part of them, experience at least one snowfall per year. In the poleward locations of the oceanic climate zone ("subpolar oceanic climates," described in greater detail below), snowfall is more frequent and commonplace.

Other Languages
العربية: مناخ محيطي
asturianu: Clima oceánicu
azərbaycanca: Dəniz iqlimi
беларуская: Марскі клімат
беларуская (тарашкевіца)‎: Марскі клімат
dansk: Kystklima
Deutsch: Seeklima
Ελληνικά: Ωκεάνιο κλίμα
español: Clima oceánico
Esperanto: Oceana klimato
hrvatski: Oceanska klima
Bahasa Indonesia: Iklim lautan
íslenska: Úthafsloftslag
italiano: Clima oceanico
עברית: אקלים ימי
Кыргызча: Деңиз климаты
македонски: Океанска клима
Bahasa Melayu: Iklim lautan
Nederlands: Zeeklimaat
日本語: 海洋性気候
norsk nynorsk: Maritimt klima
occitan: Clima oceanic
oʻzbekcha/ўзбекча: Dengiz iqlimi
português: Clima oceânico
Simple English: Oceanic climate
slovenčina: Oceánske podnebie
српски / srpski: Морска клима
srpskohrvatski / српскохрватски: Okeanska klima
svenska: Kustklimat
Türkçe: Okyanusal iklim
українська: Морський клімат