Galápagos in September
September is the extreme end of the dry season: the coldest air, the roughest sea, the quietest visitor calendar. Official arrival figures going back years show it as the low point of the tourism year. If your mental image of Galápagos is a crowded wildlife circus, September is the month that contradicts it.
Weather in September
Days average around 24 °C and nights about 19 °C, making this the coolest month of the year; Puerto Ayora’s average temperature bottoms out here too. Skies stay gray longer into the morning as the garúa thickens over the highlands. Rainfall is the year’s lowest, around 5 mm in a normal month in Puerto Ayora.
Dress for it: windbreaker on deck, fleece in the evenings. Nobody comes to Galápagos in September for beach weather, and the islands don’t pretend otherwise.
The sea in September
This is the roughest sea of the year. The Humboldt current peaks, the surface gets agitated, and long navigations in August and September can feel uncomfortable. Crossings that take two hours in March take the same time but move you around more. Boats compensate by planning overnight runs and lee-side landings.
Water sits near 20 °C by operator averages; satellite surface readings at Puerto Ayora average about 23.4 °C. The cold, nutrient-rich upwelling that makes it cold is also why the marine life is at its densest. A 5–7 mm wetsuit is standard for divers now; snorkelers should rent one without negotiating with themselves.
Wildlife in September
September delivers the dry season’s best behavioral drama, and fewer people to share it with:
- Galápagos penguins court on Bartolomé, a season that runs September through December. It is the best stretch of the year to watch them.
- Sea lions are in full breeding mood: harems form, bulls fight, and the beaches are loud. Pup births continue into November.
- Whale sharks are still passing Darwin and Wolf on liveaboard dive trips.
- Humpbacks wrap up their stay in the Bolívar Channel by the end of the month.
- Migratory shorebirds, in since August, feed along every exposed shoreline.
One honest caveat: some yachts take their annual maintenance this month. Dry dock season thins the fleet, which is exactly why the boats that do sail run at a discount.
Who September suits (and who it doesn’t)
September suits travelers who put wildlife value and quiet ahead of comfort. You get the year’s coldest air and water, some genuinely rough crossings, and in exchange: the fewest fellow visitors, the year’s best penguin watching, and prices that dip with demand.
Avoid it if seasickness is a real problem for you, or if a cold ocean would ruin the snorkeling you came for. Families tied to school holidays rarely have the choice anyway. For everyone else, the honest framing is this: September trades comfort for solitude, and some travelers think it is the best trade in the calendar.
Booking advice for September
This is the one dry-season month where last-minute deals genuinely exist, because the fleet sails below capacity. Even so, the good boats’ best cabins still go early, and several yachts sit in dry dock. Confirm your boat’s maintenance schedule before booking; a yacht fresh out of dry dock is a fine thing to end up on. Fixed arrival costs apply as always: the $200 park entry for foreign adults and the $20 transit card, both explained in our guide to entry fees.
October keeps the cool water but begins the turn back toward calm; see Galápagos in October. August sets the conditions September inherits, so Galápagos in August is useful context. For the quiet month’s mirror image in the warm season, Galápagos in May runs calm seas with different wildlife.
Last verified: September 2026