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  2/15/2026
Sunday
15 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 1, 12 hours 12 PM 78° 78° Clear 0%

 0% Thunder
( 0% severe)		 NNW   16 36% 49°
High 79° PORT ISABEL, TX 78578 weather forecast Day 1, 15 hours 3 PM 78° 79° Clear NNE   15 40% 52°
Clear



 PORT ISABEL, TX 78578 weather forecast Day 1, 18 hours 6 PM 72° 72° Clear 0%

 0% Thunder
( 0% severe)		 NE   9 57% 56°
PORT ISABEL, TX 78578 weather forecast Day 1, 21 hours 9 PM 64° 65° Clear ENE   5 81% 58°
Monday
16 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 2, 0 hours 12 AM 62° 63° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 ENE   2 87% 58°
Low 56° PORT ISABEL, TX 78578 weather forecast Day 2, 3 hours 3 AM 60° 61° Partly Cloudy NE   1 90% 57°
High 78° PORT ISABEL, TX 78578 weather forecast Day 2, 6 hours 6 AM 58° 59° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 NNE   1 93% 56°

Partly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 2, 9 hours 9 AM 66° 66° Partly Cloudy NE   1 78% 59°
PORT ISABEL, TX 78578 weather forecast Day 2, 12 hours 12 PM 75° 75° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 ENE   7 55% 58°
PORT ISABEL, TX 78578 weather forecast Day 2, 15 hours 3 PM 76° 78° Partly Cloudy E   12 54% 58°
PORT ISABEL, TX 78578 weather forecast Day 2, 18 hours 6 PM 70° 70° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 ESE   10 68% 59°
PORT ISABEL, TX 78578 weather forecast Day 2, 21 hours 9 PM 64° 64° Clear SE   8 87% 60°
Tuesday
17 FEB 2026		 PORT ISABEL, TX 78578 weather forecast Day 3, 0 hours 12 AM 63° 63° Clear 0%

 0% Thunder
( 0% severe)		 SE   7 90% 60°
Low 60° PORT ISABEL, TX 78578 weather forecast Day 3, 3 hours 3 AM 62° 62° Clear SSE   7 93% 60°
High 81° PORT ISABEL, TX 78578 weather forecast Day 3, 6 hours 6 AM 62° 62° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 SSE   7 93% 60°

Partly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 3, 9 hours 9 AM 70° 70° Partly Cloudy SSE   12 78% 63°
PORT ISABEL, TX 78578 weather forecast Day 3, 15 hours 12 PM 79° 80° Clear 0%

 0% Thunder
( 0% severe)		 SSE   17 54% 61°
PORT ISABEL, TX 78578 weather forecast Day 3, 18 hours 3 PM 79° 80° Clear SSE   20 56% 62°
PORT ISABEL, TX 78578 weather forecast Day 3, 21 hours 6 PM 72° 72° Partly Cloudy     SSE   16 73% 63°

PORT ISABEL, TX extended weather forecast
Wednesday
18 FEB 2026		 Thursday
19 FEB 2026		 Friday
20 FEB 2026		 Saturday
21 FEB 2026		 Sunday
22 FEB 2026
Low 64° Low 69° Low 70° Low 68° Low 71°
High 83° High 84° High 82° High 78° High 76°
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
5% Rain		 Mostly Cloudy
8% Rain		 Mostly Cloudy
12% Rain		 Overcast
17% Rain		 Overcast
29% Rain
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