Rules on Summon Monster while traveling in a swamp which has no dry land.. summon rules

[DM OmniBlock]

I have a question I was hoping I could receive help with. In some time my player group will be finding themselves in a swamp for about a weeks time. I plan on making it slow going and terrible for them, with difficult terrain, atmosphere effects, exhaustion, hypothermia, trench foot etc. They will remember this swamp.

Anyways, while in the swamp the players will never find dry land, it will always be water no less then a couple feet deep.

I have a player who uses summon monster, in apprehension of combat or utility I needed clarification.

Under Summon Monsters in the Magic section on page 209 it says
"A creature or object brought into being or transported to
your location by a conjuration spell cannot appear inside
another creature or object, nor can it appear f loating in
an empty space. It must arrive in an open location on a
surface capable of supporting it."

The bold part is what I am interested in. If they are always in water with no dry land does this mean my player is unable to summon any land based creature? Would the water break Line of Effect, and because the top of the water can not support the land based creature it the spell would fail?

Thank you in advance.

[Speaker for the Dead]

Shouldn't be a problem IMHO. The creature would appear on the ground, standing in a few feet of water.

[thenobledrake]

Breaking down that bold-face sentence to what it actually means:

Open location = one not occupied by another creature or piece of terrain that would not normally allow a creature in the same space.

Surface capable of supporting it = you can't summon a creature into the air, which is not a surface, nor on a surface which wouldn't hold it's weight - such as no summoning an elephant onto a thin tree branch.

[DM OmniBlock]

So I guess the question becomes does water break line of effect for summoning spells?

[thenobledrake]

DM OmniBlock wrote:

So I guess the question becomes does water break line of effect for summoning spells?

Not unless that water is actually ice at the time.

PRD wrote:

Line of Effect: A line of effect is a straight, unblocked path that indicates what a spell can affect. A line of effect is canceled by a solid barrier. It's like line of sight for ranged weapons, except that it's not blocked by fog, darkness, and other factors that limit normal sight.

Bold added for emphasis.

[DM OmniBlock]

Awesome thank you.