The OP is in Marina Del Rey. Unless he is in the windshadow of a building, he won't be too hot most of the time. Even in mid summer, past midday the sea breezes start and keep things comfortable. The temps rarely get above the mid 80s even in summer at the water's edge, and usually cooler, and it almost always cools down at night. The Santa Ana winds that are frequent in September can be bad, but most of the time it is quite pleasant.