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 AM CDT MAR 22, 2026
Clear
66°F
Feels Like: 66°F
Dewpoint: 63°F
Rel. Hum.: 90%
Visibility: 10 miles
Wind: S at 7 mph
Pressure: 30.00 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  5:00 PM MST  3/21/2026
Sunday
22 MAR 2026		 PORT ISABEL, TX 78578 weather forecast Day 1, 0 hours 12 AM 68° 68° Clear 0%

 0% Thunder
( 0% severe)		 S   12 87% 64°
Low 64° PORT ISABEL, TX 78578 weather forecast Day 1, 3 hours 3 AM 67° 67° Partly Cloudy S   10 87% 63°
High 85° PORT ISABEL, TX 78578 weather forecast Day 1, 6 hours 6 AM 65° 65° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 S   9 90% 62°

Clear



 PORT ISABEL, TX 78578 weather forecast Day 1, 9 hours 9 AM 75° 75° Clear S   14 66% 63°
PORT ISABEL, TX 78578 weather forecast Day 1, 12 hours 12 PM 83° 83° Clear 0%

 0% Thunder
( 0% severe)		 SSE   18 46% 60°
PORT ISABEL, TX 78578 weather forecast Day 1, 15 hours 3 PM 83° 83° Clear SSE   20 47% 61°
PORT ISABEL, TX 78578 weather forecast Day 1, 18 hours 6 PM 76° 78° Clear 0%

 0% Thunder
( 0% severe)		 SE   15 64% 63°
PORT ISABEL, TX 78578 weather forecast Day 1, 21 hours 9 PM 70° 70° Clear SSE   12 84% 65°
Monday
23 MAR 2026		 PORT ISABEL, TX 78578 weather forecast Day 2, 0 hours 12 AM 69° 69° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 SSE   10 87% 65°
Low 65° PORT ISABEL, TX 78578 weather forecast Day 2, 3 hours 3 AM 67° 67° Clear SSE   8 90% 64°
High 84° PORT ISABEL, TX 78578 weather forecast Day 2, 6 hours 6 AM 66° 66° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 SSE   6 90% 63°

Clear



 PORT ISABEL, TX 78578 weather forecast Day 2, 9 hours 9 AM 76° 78° Clear SE   9 69% 65°
PORT ISABEL, TX 78578 weather forecast Day 2, 12 hours 12 PM 82° 83° Clear 2%

 0% Thunder
( 0% severe)		 SE   14 53% 63°
PORT ISABEL, TX 78578 weather forecast Day 2, 15 hours 3 PM 82° 84° Clear ESE   16 56% 65°
PORT ISABEL, TX 78578 weather forecast Day 2, 18 hours 6 PM 76° 77° Clear 0%

 0% Thunder
( 1% severe)		 ESE   13 74% 67°
PORT ISABEL, TX 78578 weather forecast Day 2, 21 hours 9 PM 71° 71° Clear ESE   8 87% 67°

PORT ISABEL, TX extended weather forecast
Tuesday
24 MAR 2026		 Wednesday
25 MAR 2026		 Thursday
26 MAR 2026		 Friday
27 MAR 2026		 Saturday
28 MAR 2026
Low 67° Low 68° Low 68° Low 69° Low 65°
High 83° High 85° High 85° High 86° High 74°
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
Partly Cloudy
3% Rain		 Partly Cloudy
7% Rain		 Partly Cloudy
5% Rain		 Partly Cloudy
11% Rain		 Partly Cloudy
19% Rain
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