1) Yes. Till late Dec water temp around 14-16ºC

2)No. 99.99% flat, a few short bosses

3)Right now they're repairing the pavement and re-doing a large sector

4) That's a lottery. Early Dec you could expect 35ºC, clear sky, 90% humidity, no wind or 8ºC, rain and 45 km/h winds...
"Normal" conditions: yes 16-23ºC, 20-25km/h winds and 70-80% humidity

Apologies for unearthing this thread. Based on the course and winds/potential winds would you see this a course for a disc wheel or leave the disc at home?

The sure shot would be 45/60F, 80/90R but it depends on your ability to ride with a disc on a windy day
It is not a technical circuit, last year was very very windy, 1# and 2# women used disc as opposed to the 1# man on deep wheels

I started this thread last year and went on to have a very successful race at Mar del Plata... 2nd female amateur off the bike with second fastest amateur bike split. I rode ~5:21 on my Cervelo P3 with a Zipp 404 and 808 combination. The winds were almost exclusively head and tailwind so a disc would not have posed much of a problem. My travel buddy, Sarah Piampiano, rode a disc and went on to win the race overall for the pro women.

It's funny seeing this thread again and my original questions since I was hoping for a hot and humid day... and while we got rain, it was only 60f and the ocean swim was fairly challenging!!!

Thanks guys - so by the sounds of things as long as the winds are in front of you or behind you or non existent a disc wheel would be fine. However, I am guessing the route is largely exposed to the coast so if the winds were coming from the side it would be more of a sailing exercise on the bike.

I will be travelling from Ireland so will not have the capacity to bring a spare set of wheels! (Cold, Wind and rain sounds standard Irish weather :-) )