Hi, I have sailed exactly this route
in both directions.
Southbound in November, we had very light winds. From Vallarta to the Galapagos took me 17 days, then an additional 6 to Ecuador.
The other way in April, it took 4 days to the islands and 11 to Zihuatanejo.
The boat was a rather slow Cabo Rico
It can be a very light air trip. I would suggest making sure that you have 1000 miles worth of fuel
. with you. I did this trip 12 years ago, and the fuel
in the Galapagos was off poor quality both times. Bring a Baja
filter at least. Hopefully, it's better these days.
There are a couple of reliably windy areas that need to be negotiated, both north of the ITCZ. The first you'll encounter is the western limit of the Papagallo area if it's blowing strongly. In most cases, the rhumb line from the islands to anywhere from Zihua westward will mostly skirt this, but it can be a little rough out there if the gulf's honking.
The gulf of Tehuantapec is more formidable. Remember that these gales turn westwards as they blow south. I set a waypoint about 75 miles W of the rhumb line to Zihua in the area where these gales reach furthest west. We still had 30 knots or so for a day or two. Look at any pilot chart, and this route planning is easy.
Anyway, it's a totally doable route, and I think that it is a good alternative to going coastwise particularly if you're more interested in just getting there and not really cruising.
Good sailing. TJ