PORT ISABEL, TX 78578 Weather Forecast & Current Conditions
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  78578 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

PORT ISABEL, TX
Current Weather
12:53 PM CST FEB 14, 2026
Broken Clouds
81°F
Feels Like: 83°F
Dewpoint: 66°F
Rel. Hum.: 60%
Visibility: 10 miles
Wind: S at 21 mph, gusts to 37
Pressure: 29.79 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Regional Weather Maps

(Automated weather data from NWS/FAA)
  78578 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

PORT ISABEL, TX 78578
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
TODAY
Cloudy this morning, then becoming partly sunny. Patchy fog this morning. Highs in the lower 80s. Southeast winds 5 to 10 mph.
TONIGHT
Mostly cloudy. Lows in the upper 60s. East winds 5 to 10 mph, becoming south after midnight.
WEDNESDAY
Partly sunny in the morning, then clearing. Breezy with highs around 90. Southwest winds 5 to 10 mph, increasing to southeast 20 to 25 mph with gusts up to 35 mph in the afternoon.
WEDNESDAY NIGHT
Mostly clear and breezy and less humid with lows in the mid 60s. Northeast winds 15 to 25 mph with gusts up to 40 mph.
THURSDAY
Sunny, breezy and much cooler with highs in the mid 70s. Northeast winds 15 to 25 mph with gusts up to 35 mph.
THURSDAY NIGHT
Partly cloudy. Lows in the upper 50s.
FRIDAY
Sunny. Highs in the mid 70s.
FRIDAY NIGHT AND SATURDAY
Partly cloudy and breezy. Lows around 60. Highs in the upper 70s.
SATURDAY NIGHT THROUGH SUNDAY NIGHT
Partly cloudy and windy. Lows in the upper 60s. Highs in the upper 70s.
MONDAY
Partly sunny and breezy. Highs in the lower 80s.

  78578 WEATHER SATELLITE LOOPS
Visible Weather Satellite
PORT ISABEL, TX 78578
Infrared Weather Satellite
PORT ISABEL, TX 78578
  78578 WEATHER RADAR LOOP
NEXRAD Weather Radar
PORT ISABEL, TX 78578
 MOS COMPUTER WEATHER FORECAST

PORT ISABEL, TX 3 hourly weather forecast
weather forecast created  5:00 AM MST  2/19/2026
Thursday
19 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 1, 12 hours 12 PM 83° 86° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 S   16 59% 67°
High 88° PORT ISABEL, TX 78578 weather forecast Day 1, 15 hours 3 PM 87° 89° Partly Cloudy S   16 50% 66°
Partly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 1, 18 hours 6 PM 79° 81° Partly Cloudy 0%

 0% Thunder
( 2% severe)		 SSE   14 69% 68°
PORT ISABEL, TX 78578 weather forecast Day 1, 21 hours 9 PM 71° 71° Mostly Cloudy SSE   10 93% 69°
Friday
20 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 2, 0 hours 12 AM 70° 70° Mostly Cloudy 0%

 0% Thunder
( 1% severe)		 SSE   9 97% 69°
Low 66° PORT ISABEL, TX 78578 weather forecast Day 2, 3 hours 3 AM 69° 69° Mostly Cloudy S   8 93% 67°
High 86° PORT ISABEL, TX 78578 weather forecast Day 2, 6 hours 6 AM 68° 68° Mostly Cloudy 3%

 0% Thunder
( 1% severe)		 S   7 97% 67°

Mostly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 2, 9 hours 9 AM 73° 73° Mostly Cloudy SSE   9 87% 69°
PORT ISABEL, TX 78578 weather forecast Day 2, 12 hours 12 PM 82° 85° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 S   14 63% 68°
PORT ISABEL, TX 78578 weather forecast Day 2, 15 hours 3 PM 84° 87° Partly Cloudy SSE   15 59% 68°
PORT ISABEL, TX 78578 weather forecast Day 2, 18 hours 6 PM 78° 80° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 SSE   13 71% 68°
PORT ISABEL, TX 78578 weather forecast Day 2, 21 hours 9 PM 71° 71° Clear SSE   9 93% 69°
Saturday
21 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 3, 0 hours 12 AM 70° 70° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 SSE   8 93% 68°
Low 65° PORT ISABEL, TX 78578 weather forecast Day 3, 3 hours 3 AM 68° 68° Partly Cloudy SSE   7 97% 67°
High 84° PORT ISABEL, TX 78578 weather forecast Day 3, 6 hours 6 AM 67° 67° Partly Cloudy 1%

 0% Thunder
( 4% severe)		 SSE   3 100% 67°

Partly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 3, 9 hours 9 AM 73° 73° Partly Cloudy SE   5 87% 69°
PORT ISABEL, TX 78578 weather forecast Day 3, 15 hours 12 PM 81° 84° Partly Cloudy 4%

 0% Thunder
( 1% severe)		 E   10 63% 67°
PORT ISABEL, TX 78578 weather forecast Day 3, 18 hours 3 PM 80° 82° Partly Cloudy NE   15 62% 66°
PORT ISABEL, TX 78578 weather forecast Day 3, 21 hours 6 PM 74° 74° Partly Cloudy     NE   14 71% 64°

PORT ISABEL, TX extended weather forecast
Sunday
22 FEB 2026		 Monday
23 FEB 2026		 Tuesday
24 FEB 2026		 Wednesday
25 FEB 2026		 Thursday
26 FEB 2026
Low 61° Low 51° Low 51° Low 62° Low 69°
High 68° High 71° High 73° High 80° High 84°
PORT ISABEL, TX 78578 weather forecast Day 4 PORT ISABEL, TX 78578 weather forecast Day 5 PORT ISABEL, TX 78578 weather forecast Day 6 PORT ISABEL, TX 78578 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
18% Rain		 Clear
5% Rain		 Clear
4% Rain		 Clear
10% Rain		 Partly Cloudy
13% Rain
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