There’s no slow season in Port Aransas in July. Between the Fourth of July celebration, the Deep Sea Roundup, and miles of warm Gulf beach, the island is firing on all cylinders. Here’s how to spend your July vacation in Port Aransas: A Quick Trip Game Plan July weather in Port Aransas is warm and sunny, with average highs around 88 to 89°F and overnight lows in the low 80s. Humidity sits in the mid-to-high 70s, which means mornings...