Weather in Port Isabel, TX
Updated 2026-08-11 10:15 local time · ZIP codes 78578
Partly Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
90°5% rain94°4% rain
95°3% rain96°3% rain96°3% rain96°3% rain97°2% rain93°4% rain91°4% rain89°4% rain86°6% rain
84°8% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 8%).
It feels like 99°F with winds near 15 mph.
86°F, 6% rain chance and 16 mph wind.
Visibility is around 6 mi; gusts may reach 23 mph.
Current temperature is 90°F, wind 15 mph, rain chance up to 8%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Port Isabel weather today
Partly Cloudy and 90°F in Port Isabel, TX. Today's high is 97°F with a 6% rain chance. Winds are around 15 mph with gusts near 17 mph. Relative humidity is 58%, pressure is 30.05 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Port Isabel
Sunrise is at 07:00 AM and sunset is at 08:08 PM. Tomorrow's forecast calls for Sunny with a high near 92°F and a low near 82°F. The maximum rain chance is 6%.