Sir Tain Doom's page

Force Ward would not protect against grapples since grapples aren't "attacks" in the technical sense, since an attack requires an attack roll, which grapples do not make, they make CMB rolls.

It WOULD protect you from the free grapple granted by Grab since the grapple is riding on an attack. But the fact that it's a grapple is irrelevant, the ability negates ANY effect that occurs from being hit by an attack.

If you are looking for a "make sense" answer for how force ward would protect you from a grab is that you can look at it like a force field. It's not a solid "shell" that an enemy could just pick up with you in it. It's more like an intangible force that reacts and repels attacks as they happen. A creature trying to grab a Force Warded creature would find his tentacle simply sliding off him as it tried to get traction.

Whilst I really appreciate your answer, especially as it confirms my reading of the rules, your 'make sense' explanation doesn't make sense to me as Force Ward has no effect on a grapple unless it is a free grapple. This is illogical to me, think I will house rule this one so that this type of creature grapples as standard action with a free attack on a successful grapple.

Thank you for your reply.