Late March in South Padre Island is generally pleasant and spring‑like, with average daytime temperatures typically in the 70s (around 70–80°F) and nighttime temperatures usually in the 60s. There’s plenty of sunshine for outdoor activities, but temperatures can still feel cool in the early morning or evening, so layers are a great idea. Sand and sea breezes can add a chill after sunset, especially near the water, so bringing a light jacket or sweater is recommended