When the wind is blowing, be sure to check your Havanese eyes when they come in. You will be surprised at the irritation hair stuck in the eyes can do. I make it a habit to check more often in windy days and I check when I groom, first thing in the morning and last thing at night.
Is that a bit too much? Maybe but I think of me with hair in my eyes and how I would feel and it motivates me.
If your Havanese is prone to some drainage, this will reduce it by keeping the eye area clean.
Abigail adores the wind. She stands out there as if to say - ah - cool wind finally. I swear the Havanese adore the cooler weather. It appears to invigorate them as heat tends to make them sluggish.
That's rather like us, don't you think - well many of us.