Question

What would the wind 'cooling his brooth' do to Salarino?How would the wind affect his mood?

Answer 1

if Salarino's ships would be at sea the wind would have cooled his (Salarino) 's ship and would have reminded him of his ships at sea and it would make him sad as a strong wind could harm his ships.
hope it helps you

Answer 2

$\huge{Aswer}$

It reminds Salarino of what danger a wind could do to his ship if his financial ventures were in danger. It would make him sad.