Despite their proximity to the Antarctic, the South Shetland Islands have a relatively mild Antarctic climate due to their location just north of the Antarctic Peninsula.

The South Shetland Islands have a cold maritime climate, with temperatures rarely exceeding 2°C during the summer months. Winters can be harsh, with lows dipping as far as -12°C, and precipitation is fairly consistent throughout the year, primarily falling as snow. Summers can see temperatures hover around 1°C (34°F), while winters are much colder, often dipping below -10°C (14°F). The islands are frequently buffeted by strong winds and experience high levels of precipitation, mostly in the form of snow. 

The proximity of the islands to the Southern Ocean and the Bransfield Strait means that the islands are heavily influenced by oceanic currents, which can bring sudden changes in weather. The waters surrounding the islands are rich in nutrients, supporting a diverse marine ecosystem, but they are also notoriously rough, with frequent storms and sea ice creating hazardous conditions for ships. 

Climate Table for the South Shetland Islands (Average Temperatures in °C)

Month Day temp (°C) night temp (°C) Precipitation (mm)
January 2°C -2°C 50 mm
FEBRUARY 2°C -3°C 45 mm
MARCH 1°C -4°C 55 mm
APRIL 0°C -7°C 60 mm
MAY -2°C -9°C 70 mm
JUNE -3°C -10°C 75 mm
JULY -4°C -12°C 80 mm
AUGUST -4°C -11°C 75 mm
SEPTEMBER -3°C -10°C 70 mm
OKTOBER -1°C -7°C 65 mm
november 0°C -5°C 60 mm
december 1°C -3 55 mm

 

Facts about Climate of the South Shetland Islands
  • Antarctica
  • South Shetland Islands