This website has tables and graphs to show length of day for locations throughout the world, including Antarctica and the Arctic. Additional weather information is also included.
(permission to link and use the site was granted by Matt Tukianen, the site creator, on July 9, 2008)
WHOI is the world's largest private, nonprofit ocean research, engineering and education organization. This site has information on oceans from climate to ocean life to ships and technology.