Yes, Siva would be able to tell that she could get the spell off before reaching the island.
Low level Second Sight results are pretty much like D&D's augury spell. I couldn't quite tell what Siva is trying to determine here unless she's just looking for general advice. I can play it that way, no problem, but the advice may not be as directed towards what you are trying to discover.
I tend to use (roll)1d20(/roll)+3 because I have never been quite sure if the +3 gets added in or not.
thotd
OOC: Please RP for me. In Germany right now and internet at airport barely working. Better than what I had in last week which was non-existent internet. Should be back tonight.
PPS: @fireinthedust popped up in another thread. Hopefully we will see him soon.