French Guiana · Salvation Islands
Devil's Island
Sea
84.2°F
Air
–
UV
–
Bathtub
Above 28°C
More like this
Climate · monthly averages
Sea temperature by month
5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
75°F
79°F
82°F
86°F
90°F
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
MinMin °F
8080.2
8080.5
8181.2
8281.5
8282.1
8382.9
8383.4
8382.8
8382.8
8382.8
8282.4
8281.7
AvgAvg °F
8181.2
8181.1
8281.8
8282.1
8382.7
8383.2
8483.7
8383.2
8383.2
8483.7
8382.8
8282.0
MaxMax °F
8282.1
8282.0
8383.0
8383.0
8383.4
8483.7
8484.0
8483.7
8483.9
8484.2
8383.1
8382.7
Warmest in July (83.7°F). Coldest in February (81.1°F). Comfortable for swimming year-round.
About Devil's Island
Devil's Island is the smallest of the three Salvation Islands, 15 kilometres off French Guiana's Atlantic coast, and infamous for the 1852–1953 French penal colony that held Alfred Dreyfus in solitary confinement from 1895 to 1899. Henri Charrière's 1969 memoir Papillon cemented the archipelago's reputation; neighbouring Île Royale carries the prison ruins, while Île Saint-Joseph hides the isolation cells in the jungle. Swimming is not the point here, as strong currents keep visitors focused on colonial history; the equatorial sea stays at 27–28 °C year-round.