wet suits

Great to hear that you're getting set for your Galapagos trip! March will be warm and sometimes wet - at this time of the year the sea temperature tends to be warm, so wetsuits aren't essential for snorkelling. If you have one already and can fit it into your luggage easily you may feel more comfortable in a wetsuit. Otherwise a t-shirt to prevent sunburn is a good idea during snorkelling sessions. If you intend to dive then wetsuits are recommended but you can also hire these on the boat if you prefer. Any lightweight waterproof jacket would be suitable for this trip, you're more likely to need this to keep dry than for warmth. I hope this is helpful.