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
2:53 AM CDT JUN 13, 2026
Broken Clouds
82°F
Feels Like: 89°F
Dewpoint: 75°F
Rel. Hum.: 79%
Visibility: 10 miles
Wind: ESE at 9 mph
Pressure: 29.90 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Weather Map

(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  6:00 PM MDT  6/12/2026
Saturday
13 JUN 2026		 PORT ISABEL, TX 78578 weather forecast Day 1, 0 hours 1 AM 83° 90° Clear 27%
RAIN
<.01 in		 0% Thunder
( 26% severe)		 ESE   12 77% 75°
Low 80° PORT ISABEL, TX 78578 weather forecast Day 1, 3 hours 4 AM 82° 89° Partly Cloudy SE   9 79% 75°
High 88° PORT ISABEL, TX 78578 weather forecast Day 1, 6 hours 7 AM 81° 87° Partly Cloudy 49%
RAIN
.1–.25 in		 0% Thunder
( 30% severe)		 ESE   9 85% 76°

Mostly Cloudy

Rain Likely

 PORT ISABEL, TX 78578 weather forecast Day 1, 9 hours 10 AM 86° 97° Partly Cloudy ESE   14 75% 77°
PORT ISABEL, TX 78578 weather forecast Day 1, 12 hours 1 PM 86° 98° Mostly Cloudy 52%
RAIN
***		 0% Thunder
( 34% severe)		 E   18 77% 78°
PORT ISABEL, TX 78578 weather forecast Day 1, 15 hours 4 PM 86° 98° Mostly Cloudy E   21 77% 78°
PORT ISABEL, TX 78578 weather forecast Day 1, 18 hours 7 PM 85° 97° Partly Cloudy 16%
RAIN
<.01 in		 0% Thunder
( 23% severe)		 ESE   20 80% 78°
PORT ISABEL, TX 78578 weather forecast Day 1, 21 hours 10 PM 84° 94° Partly Cloudy ESE   17 80% 77°
Sunday
14 JUN 2026		 PORT ISABEL, TX 78578 weather forecast Day 2, 0 hours 1 AM 83° 92° Partly Cloudy 27%
RAIN
.01–.1 in		 0% Thunder
( 20% severe)		 SE   14 82% 77°
Low 81° PORT ISABEL, TX 78578 weather forecast Day 2, 3 hours 4 AM 82° 90° Partly Cloudy SSE   12 85% 77°
High 89° PORT ISABEL, TX 78578 weather forecast Day 2, 6 hours 7 AM 81° 88° Mostly Cloudy 37%
RAIN
.01–.1 in		 0% Thunder
( 29% severe)		 SE   10 88% 77°

Mostly Cloudy

Chance of Rain

 PORT ISABEL, TX 78578 weather forecast Day 2, 9 hours 10 AM 86° 98° Mostly Cloudy SE   14 77% 78°
PORT ISABEL, TX 78578 weather forecast Day 2, 12 hours 1 PM 88° 103° Mostly Cloudy 31%
RAIN
.5–1 in		 0% Thunder
( 30% severe)		 SSE   18 75% 79°
PORT ISABEL, TX 78578 weather forecast Day 2, 15 hours 4 PM 88° 103° Mostly Cloudy SSE   18 75% 79°
PORT ISABEL, TX 78578 weather forecast Day 2, 18 hours 7 PM 86° 98° Mostly Cloudy 10%
RAIN
<.01 in		 0% Thunder
( 16% severe)		 SSE   16 77% 78°
PORT ISABEL, TX 78578 weather forecast Day 2, 21 hours 10 PM 84° 95° Partly Cloudy SE   14 82% 78°

PORT ISABEL, TX extended weather forecast
Monday
15 JUN 2026		 Tuesday
16 JUN 2026		 Wednesday
17 JUN 2026		 Thursday
18 JUN 2026		 Friday
19 JUN 2026
Low 80° Low 81° Low 82° Low 82° Low 82°
High 91° High 91° High 93° High 94° High 95°
PORT ISABEL, TX 78578 weather forecast Day 3 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
Overcast
71% Rain		 Partly Cloudy
50% Rain		 Overcast
41% Rain		 Mostly Cloudy
36% Rain		 Mostly Cloudy
27% Rain
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