National Weather Service

News Headlines

New: Quick Summary of Starr County Damaging Wind, Hail, and Flash Flooding March 7-8, 2026
New! Understand Spring and Summer Hazardous Weather in the RGV with the 2026 Guide
Winter 2025/2026 Weather and Climate Summary for the RGV - Warm and Dry - and a Hard Freeze - Worsens Drought
March-May (Spring 2026) Outlook: Warmer than normal temperatures are favored to continue; precipitation is a toss-up; drought, wildfire potential, water supply, and heat risk concerns are in focus
The Potential for Wildfire Spread Will Remain Acute through Early March. Stop Wildfires Before they Start with Smokey Bear
El riesgo de propagación de incendios forestales aumenta durante marzo. Revise estas medidas de prevención.
Drought is Worsening and Increasing in Coverage Across the Area as We Head into Spring. Track Its Coverage Here.

Current conditions at

Port Isabel, Port Isabel-Cameron County Airport (KPIL)

Lat: 26.16°NLon: 97.34°WElev: 16ft.

Fair

63°F

17°C

Humidity	84%
Wind Speed	SE 6 mph
Barometer	29.98 in (1015.2 mb)
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Last update	13 Mar 11:53 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Port Isabel TX

Overnight
Low: 66 °F
Clear
Saturday
High: 81 °F
Sunny then
Sunny and
Breezy
Saturday Night
Low: 70 °F
Partly Cloudy
Sunday
High: 85 °F
Sunny and
Breezy
Sunday Night
Low: 58 °F
Partly Cloudy
then Slight
Chance
T-storms and
Breezy
Monday
High: 66 °F
Decreasing
Clouds and
Windy
Monday Night
Low: 55 °F
Mostly Clear
and Breezy
then Mostly
Cloudy
Tuesday
High: 70 °F
Partly Sunny
Tuesday Night
Low: 61 °F
Partly Cloudy

Detailed Forecast

Overnight

Clear, with a low around 66. South southeast wind around 10 mph.

Saturday

Sunny, with a high near 81. Breezy, with a south southeast wind 9 to 18 mph.

Saturday Night

Partly cloudy, with a low around 70. South southeast wind 14 to 16 mph, with gusts as high as 23 mph.

Sunday

Sunny, with a high near 85. Breezy, with a south wind 16 to 22 mph, with gusts as high as 29 mph.

Sunday Night

A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 58. Breezy, with a south southwest wind 11 to 16 mph becoming north 17 to 22 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 20%.

Monday

Mostly cloudy, then gradually becoming sunny, with a high near 66. Windy, with a north wind 23 to 31 mph, with gusts as high as 41 mph.

Monday Night

Partly cloudy, with a low around 55. Breezy, with a northeast wind 9 to 18 mph, with gusts as high as 23 mph.

Tuesday

Partly sunny, with a high near 70. East northeast wind 9 to 16 mph.

Tuesday Night

Partly cloudy, with a low around 61. East wind 9 to 13 mph.

Wednesday

Sunny, with a high near 76. Southeast wind 8 to 16 mph.

Wednesday Night

Mostly clear, with a low around 65. South southeast wind 8 to 14 mph.