Weather in Port Isabel, TX
Updated 2026-09-26 09:00 local time · ZIP codes 78578
Patchy rain nearby
No government weather alerts were returned for this location at the latest update.
Next hours
85°12% rain87°14% rain89°17% rain89°17% rain90°13% rain90°17% rain90°14% rain89°19% rain
88°13% rain
86°9% rain85°15% rain
84°19% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 19%).
It feels like 93°F with winds near 9 mph.
85°F, 12% rain chance and 9 mph wind.
Visibility is around 6 mi; gusts may reach 25 mph.
Current temperature is 85°F, wind 9 mph, rain chance up to 19%.
UV index is 1.
Local weather characteristics in Port Isabel
Texas spans several climate zones, from humid Gulf Coast areas to dry western deserts and the High Plains. Heat, severe thunderstorms, tropical systems and winter cold outbreaks can all affect different parts of the state.
Port Isabel is part of the South weather region. The forecast point is near 26.07°N latitude and 97.21°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Port Isabel weather today
Patchy rain nearby and 85°F in Port Isabel, TX. Today's high is 90°F with a 40% rain chance. Winds are around 9 mph with gusts near 11 mph. Relative humidity is 70%, pressure is 29.96 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Port Isabel
Sunrise is at 07:19 AM and sunset is at 07:21 PM. Tomorrow's forecast calls for Sunny with a high near 90°F and a low near 81°F. The maximum rain chance is 8%.