Galápagos Islands and the surrounding waters are a UNESCO World Heritage Site and are included in the the Galápagos National Park, and the Galápagos Marine Reserve. The area represents one of the world’s unique ecosystems with rich biodiversity. Not surprising Charles Darwin collected material and thoughts for his discoveries in evolution. You have to visit Galapagos islands at least one time if you are interested in nature, wildlife and biology. There is no other place on our planet in terms of wildlife, on land and in the water. You can visit one or several islands, on land only or on a small cruise ship. For divers, best SCUBA diving is from a live-aboard ship.
The main activity is to explore the wildlife and enjoy the majestic views. However, ways to explore the wildlife is a bit different for land and cruise based trips.
Lava tunnels are interesting geological phenomenon that looks like a subway tunnel, except it is natural.
El Chato Giant Tortoise Reserve is right next to the lava tube. Giant tortoises roam free in the area.
SCUBA and sknorkelling. You can snorkel and dive from general cruise ship or as a day trip. For example, there are SCUBA day trips from Santa Cruz island. Obviously you will have access only to local areas. The most impressive diving is at the northern Wolf and Darwin islands. Only dedicated SCUBA liveaboards venture there. Diving in Galapagos is challenging. Our advice is that you go on a liveaboard only if you are comfortable and experienced, at least at basic level, to dive in cold water, strong currents, limited visibility, and a chance to get separated from the group.
Water temperatures. We were diving in January, at the beginning of the calm and warm period. Water temperatures still could drop to 16 degrees Centigrade (60 Fahrenheit) at the south-west coast of Isabella Island. Water around Wolf and Darwin islands was warmer but we still needed a 7mm semi-dry suit + vest + gloves + hood. At Isabella island we could not stay longer than 20 min as temperatures dropped to 13 degrees below second thermocline. Filling your suit with warm water right before you jump into the water buys you extra 2-3 min. Be careful interpreting water temperature posted online, it usually represents surface temperature while most diving is below thermocline. Our conclusion was that a dry suit is a must between May - November. Personally, I would take a drysuit all year round. A 7mm semi-dry suit + vest + hood + gloves is not less in terms of hassle, limits flexibility, chokes you if it is small and lets cold water in if it is large.... but still does not save you from cold.
When to go
Winter is reverse to travelers from the Northern hemisphere. The islands are on the Equator, but the Humboldt current brings air and water from the Antarctic and this cools down air and, to a greater degree water. The warmest water is between February - April, but this is also the slightly more rainy period. There is also another current from the north which brings warm air and water to the northern islands such as Darwin and Wolf. If you are not a diver you can come at any time, but for divers colder months mean diving in a dry suit and possible rough sea. You can check for more information here.

Up until 1969 the only way to reach the islands was on a ship. Presently there are regular flights to the islands. First you will need to fly to an international airport in Ecuador, either the capital Quito (UIO) or Guayaquil (GYE). Unless you live in South America there will be a stop to change planes. After arrival in Quito or Guayaquil (most likely Quito) you will need to fly with a domestic flight to either Baltra (GPS) or San Cristobal (SCY) islands in Galapagos. The place of landing depends on your land or cruise itinerary. Please double check from which island you start your tour in Galapagos. The international flights can take anywhere from 8+ (North America) to 14+ hours (Europe) and longer from Asia. The domestic flight is about 3 hours. We booked through GalapagosIslands.com who took care of all logistics, stopover hotels and even trip extensions to Machu Picchu and Amazon.
There are several options to explore the islands. The most popular is a cruise on a medium size ship. Some ships are luxurious. As there are different islands with different wildlife, cruising gives you best chances to see and explore the full range of Galapagos biodiversity. If you prefer to stay on land you can stay at one island (Santa Cruz) or do island hopping. The Darwin's Station, the headquarters of the National park, the lava tunnels and the Giant tortoises are on Sana Cruz island. All trips include this island as a must do stop.
Our itinerary
Day 1: Land in San Cristobal airport, transfer to the boat, sail to Lobos island, check dive
Day 2: Sail to Santa Cruz island, visit to El Chato Giant Tortoise Reserve, sail to Seymour
Day 3: Overnight passage to Darwin island (can be rough as you cross open sea)
Days 3-5: Diving at Darwin and Wolf islands (best diving in Galapagos)
Day 6: Overnight pasage to Isabela Island, diving (coldest water), Fernandina Island, diving
Day 7: Santiago Island, diving, sail to Santa Cruz
Day 8: Visit to the Charles Darwin Research Station, sail to San Cristobal
Day 9: Departure
