Comfort is key when you go whale watching in Monterey, CA. Dress in warm layers, including long pants and a warm, windproof jacket. Temperatures are usually lower on sea than on land. Shoes should have flat soles and closed toes, and you may also want to wear a sun hat or warm cap. Bring sunglasses, sun block, and chapstick, and make sure that your camera has a charged battery and plenty of space in its memory.