Where to find reliable tide times online?

[Bill]

As the title says really, I've found tide times.org but it seems a little unreliable, or there's something peculiar about Swanage that I'm missing - See http://www.tidetimes.org.uk/Swanage-20110923.html Tides should be 6ish hours apart AFAIK?

So what sites do you guys use?

[Bill]

Aha, that makes sense, although I've found times when the Beeb and tide times.org agree but the locals say something else