National Weather Service

News Headlines

WE ARE HIRING: NWS Brownsville/Rio Grande Valley is officially hiring a GS-5/7/9 Meteorologist. Apply today at USAJobs!
New: October-December2026 Outlook - After a brutally hot and dry September, October brings the pattern change to wetter and less hot, with above average rainfall to close out 2026; flash flooding, water supply, & hazardous marine conditions in focus

Current conditions at

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

Lat: 26.16°NLon: 97.34°WElev: 16ft.

Thunderstorm in Vicinity Heavy Rain Fog/Mist

76°F

24°C

Humidity	97%
Wind Speed	NW 15 mph
Barometer	29.95 in (1014.2 mb)
Dewpoint	75°F (24°C)
Visibility	1.25 mi
Heat Index	75°F (24°C)
Last update	5 Oct 1:53 am CDT

More Information:

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

Extended Forecast for

Port Isabel TX

Overnight
Low: 79 °F
Showers
Monday
High: 81 °F
Showers
Monday Night
Low: 79 °F
Showers
Tuesday
High: 81 °F
Showers and
Breezy
Tuesday Night
Low: 79 °F
Showers
Likely
Wednesday
High: 83 °F
Showers
Likely and
Breezy
Wednesday Night
Low: 79 °F
Showers
Likely
Thursday
High: 82 °F
Showers
Thursday Night
Low: 79 °F
Showers
Likely

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Low around 79. North wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Monday

Showers and possibly a thunderstorm. High near 81. North wind 14 to 17 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Monday Night

Showers and possibly a thunderstorm. Low around 79. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Tuesday

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10am. High near 81. Breezy, with a north wind 14 to 18 mph. Chance of precipitation is 80%.

Tuesday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 79. North wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Wednesday

Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 83. Breezy, with a north wind 11 to 18 mph. Chance of precipitation is 70%.

Wednesday Night

Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 79. North northeast wind 7 to 15 mph. Chance of precipitation is 70%.

Thursday

Showers and possibly a thunderstorm. High near 82. North northeast wind 10 to 17 mph. Chance of precipitation is 80%.

Thursday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 79. Northeast wind 9 to 16 mph. Chance of precipitation is 60%.

Friday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Breezy, with a north wind 11 to 20 mph. Chance of precipitation is 60%.

Friday Night

A 40 percent chance of showers. Mostly cloudy, with a low around 79. North northeast wind 9 to 17 mph.

Saturday

A 40 percent chance of showers. Mostly sunny, with a high near 83.

Saturday Night

A 20 percent chance of showers. Partly cloudy, with a low around 78.

Sunday

A 20 percent chance of showers. Mostly sunny, with a high near 84.