They might say something before the start of the swim about how the currents are running. It's important for you to be aware of this because it will affect how you aim for the buoys and the swim exit. So don't miss the pre-race briefing!
Saltwater is great to swim in, though, it's so bouyant! Try not to swallow any, though, it could upset your stomach. Maybe have a bottle of water in transition waiting.
Usually the water is calmest at dawn- hopefully that will be true for your race!
Nanci
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"...I'm like the cycling version of the guy in Flowers for Algernon." Mike Magnuson