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
9:53 AM CST JAN 1, 2026
Clear
72°F
Feels Like: 72°F
Dewpoint: 57°F
Rel. Hum.: 59%
Visibility: 10 miles
Wind: SW at 8 mph
Pressure: 30.15 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 12/31/2025
Thursday
1 JAN 2026		 PORT ISABEL, TX 78578 weather forecast Day 1, 0 hours 12 AM 56° 55° Clear 0%

 0% Thunder
( 0% severe)		 S   5 80% 50°
Low 54° PORT ISABEL, TX 78578 weather forecast Day 1, 3 hours 3 AM 55° 54° Clear S   5 86% 51°
High 77° PORT ISABEL, TX 78578 weather forecast Day 1, 6 hours 6 AM 55° 55° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 S   3 90% 52°

Mostly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 1, 9 hours 9 AM 63° 63° Partly Cloudy S   6 81% 57°
PORT ISABEL, TX 78578 weather forecast Day 1, 12 hours 12 PM 74° 74° Mostly Cloudy 1%

 0% Thunder
( 2% severe)		 S   12 59% 59°
PORT ISABEL, TX 78578 weather forecast Day 1, 15 hours 3 PM 76° 78° Mostly Cloudy S   14 60% 61°
PORT ISABEL, TX 78578 weather forecast Day 1, 18 hours 6 PM 71° 71° Mostly Cloudy 2%

 0% Thunder
( 1% severe)		 SSE   12 76% 63°
PORT ISABEL, TX 78578 weather forecast Day 1, 21 hours 9 PM 67° 67° Partly Cloudy S   12 93% 65°
Friday
2 JAN 2026		 PORT ISABEL, TX 78578 weather forecast Day 2, 0 hours 12 AM 66° 66° Partly Cloudy 2%

 0% Thunder
( 1% severe)		 S   10 97% 65°
Low 62° PORT ISABEL, TX 78578 weather forecast Day 2, 3 hours 3 AM 66° 66° Partly Cloudy S   10 97% 65°
High 83° PORT ISABEL, TX 78578 weather forecast Day 2, 6 hours 6 AM 64° 63° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 SSW   10 97% 63°

Partly Cloudy



 PORT ISABEL, TX 78578 weather forecast Day 2, 9 hours 9 AM 69° 69° Clear SSW   13 84% 64°
PORT ISABEL, TX 78578 weather forecast Day 2, 12 hours 12 PM 80° 82° Partly Cloudy 0%

 0% Thunder
( 0% severe)		 SSW   16 58% 64°
PORT ISABEL, TX 78578 weather forecast Day 2, 15 hours 3 PM 82° 83° Partly Cloudy S   15 53% 63°
PORT ISABEL, TX 78578 weather forecast Day 2, 18 hours 6 PM 75° 75° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 S   12 71% 65°
PORT ISABEL, TX 78578 weather forecast Day 2, 21 hours 9 PM 70° 70° Partly Cloudy S   12 90% 67°

PORT ISABEL, TX extended weather forecast
Saturday
3 JAN 2026		 Sunday
4 JAN 2026		 Monday
5 JAN 2026		 Tuesday
6 JAN 2026		 Wednesday
7 JAN 2026
Low 64° Low 59° Low 59° Low 63° Low 67°
High 86° High 76° High 79° High 83° High 79°
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
7% Rain		 Clear
4% Rain		 Partly Cloudy
4% Rain		 Partly Cloudy
11% Rain		 Partly Cloudy
16% Rain
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