National Weather Service

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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

75°F

24°C

Humidity	55%
Wind Speed	E 20 mph
Barometer	29.96 in (1014.4 mb)
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Last update	13 Mar 4:53 pm CDT

More Information:

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

Extended Forecast for

Port Isabel TX

Tonight
Low: 67 °F
Clear
Saturday
High: 78 °F
Sunny then
Sunny and
Breezy
Saturday Night
Low: 71 °F
Mostly Clear
Sunday
High: 82 °F
Sunny and
Breezy
Sunday Night
Low: 59 °F
Partly Cloudy
then Slight
Chance
T-storms and
Breezy
Monday
High: 64 °F
Decreasing
Clouds and
Windy
Monday Night
Low: 58 °F
Mostly Clear
and Breezy
then Mostly
Cloudy
Tuesday
High: 68 °F
Partly Sunny
Tuesday Night
Low: 62 °F
Partly Cloudy

Detailed Forecast

Tonight

Clear, with a low around 67. South southeast wind 10 to 14 mph.

Saturday

Sunny, with a high near 78. Breezy, with a southeast wind 10 to 18 mph, with gusts as high as 23 mph.

Saturday Night

Mostly clear, with a low around 71. South southeast wind around 17 mph, with gusts as high as 22 mph.

Sunday

Sunny, with a high near 82. Breezy, with a south wind 18 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. Partly cloudy, with a low around 59. Breezy, with a south wind 13 to 18 mph becoming north northeast 20 to 25 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 64. Windy, with a north wind 23 to 33 mph, with gusts as high as 41 mph.

Monday Night

Partly cloudy, with a low around 58. Breezy, with a northeast wind 10 to 18 mph, with gusts as high as 23 mph.

Tuesday

Partly sunny, with a high near 68. East northeast wind 10 to 16 mph.

Tuesday Night

Partly cloudy, with a low around 62. East southeast wind 10 to 14 mph.

Wednesday

Sunny, with a high near 74. Southeast wind 9 to 16 mph.

Wednesday Night

Mostly clear, with a low around 66. South southeast wind 9 to 15 mph.