Weather and Tides
Weather on the Web - links to many weather sites.Weather from the Met Office
Conditions at Sea - live info from weather buoys and other sources
Sea surface temperatures - Information from geostationary satellites on surface temperatures.
Weatherpost - The Washington Post's excellent weather site. International coverage, radar pictures, forecasts,etc.
CNN 5 day forecasts for almost anywhere.
Good Weather and Tide Table service - from Yachting & Boating World
Tidal Predictions worldwide - Prediction software