There are a couple of go to fragrance profiles I try to stick to for the most part during the summer...
Citrus / Colonia type scents (good in spring/fall)
Fougere's (good for spring and fall as well)
Mentholated soaps
Tropical soaps
Beach vibe soaps
Barbershops (year round)
Any mixture, for the most part, during the hotter months is a good thing.
For the most part, I try and stay away from woody, leather, tobacco scented stuff. So as of right now, my favorite summer soaps are:
B&M Adagio (hands down my favorite)
Declaration Champs de Lavande, Pure Lavender
Fine Italian Citrus
Nuavia Verde
MdC fougere and original
Stirling Iced Pineapple, Satsuma, Piacenza
Wholly Kaw Fern Concerto
S.V. Opuntia, Stella Alpina (haven't tried 70th yet, but I would imagine this would make the list)
The Holy Black Creeper series
A&E SoCal Hipster, (little fictions), L'Orange Verte