Wavescape gives the surf forecasts from a South African perspective. Normally highly accurate.
Magic Seaweed not only provides the surf report for Jeffreys Bay but also the top surf breaks from around the world.
South African Weather Office gives a detailed weather report with expected rainfall and adverse weather warnings.
Wind Guru is the personal favourite of many outdoor enthusiasts and combined with the above weather sites, you will know whether is a beach day in JBay or whether you should pull out your Ugg boots and snuggle up for the day.