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How to pack for a whale watching trip
Dress in layers.
It is usually colder out on the water than it is inland or even on the shore. You will want to wear several layers to keep yourself warm during your trip.
To be safe, expect the temperature to be 20-30 f (11-16 c) colder on the water. Some useful layering items include sweaters, sweatshirts, scarves, and flannel shirts.