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
1:53 PM CDT SEP 18, 2025
Overcast Light Rain Mist NA
Feels Like:	NA
Dewpoint:	NA
Rel. Hum.:	NA%
Visibility:	6 miles
Wind:	SE at 24 mph, gusts to 36
Pressure:
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 6:00 AM MDT 9/18/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Thursday
18 SEP 2025

1 PM

84°

92°

Mostly Cloudy

52%
RAIN
***

0% Thunder
( 41% severe)

E 13

74%

75°

High 87°

4 PM

86°

95°

Mostly Cloudy

E 14

70%

75°

Mostly Cloudy

Rain Likely

7 PM

83°

90°

Partly Cloudy

14%
RAIN
.01–.1 in

0% Thunder
( 11% severe)

E 12

74%

74°

10 PM

81°

86°

Partly Cloudy

E 9

79%

74°

Friday
19 SEP 2025

1 AM

79°

83°

Partly Cloudy

25%
RAIN
<.01 in

0% Thunder
( 19% severe)

ESE 5

85%

74°

Low 75°

4 AM

78°

80°

Partly Cloudy

E 3

88%

74°

High 89°

7 AM

76°

76°

Partly Cloudy

25%
RAIN
<.01 in

0% Thunder
( 19% severe)

ENE 3

90%

73°

Partly Cloudy

Chance of Rain

10 AM

84°

92°

Partly Cloudy

ENE 7

74%

75°

1 PM

86°

94°

Partly Cloudy

25%
RAIN
<.01 in

0% Thunder
( 25% severe)

ENE 12

68%

74°

4 PM

87°

95°

Partly Cloudy

ENE 12

65%

74°

7 PM

84°

91°

Partly Cloudy

12%
RAIN
<.01 in

0% Thunder
( 11% severe)

E 9

72%

74°

10 PM

81°

86°

Partly Cloudy

E 6

79%

74°

Saturday
20 SEP 2025

1 AM

79°

83°

Partly Cloudy

22%
RAIN
<.01 in

0% Thunder
( 9% severe)

ESE 2

85%

74°

Low 75°

4 AM

77°

78°

Partly Cloudy

SE 2

90%

74°

High 90°

7 AM

76°

76°

Partly Cloudy

35%
RAIN
.1–.25 in

0% Thunder
( 14% severe)

NE 2

94%

74°

Partly Cloudy

Chance of Rain

10 AM

84°

91°

Partly Cloudy

E 6

72%

74°

1 PM

87°

95°

Partly Cloudy

36%
RAIN
.5–1 in

0% Thunder
( 22% severe)

E 10

65%

74°

4 PM

88°

98°

Partly Cloudy

E 12

66%

75°

7 PM

85°

93°

Partly Cloudy

E 9

72%

75°


PORT ISABEL, TX extended weather forecast
Sunday 21 SEP 2025	Monday 22 SEP 2025	Tuesday 23 SEP 2025	Wednesday 24 SEP 2025	Thursday 25 SEP 2025
Low 77°	Low 77°	Low 78°	Low 79°	Low 78°
High 91°	High 91°	High 92°	High 92°	High 93°

Partly Cloudy 36% Rain	Partly Cloudy 30% Rain	Partly Cloudy 24% Rain	Partly Cloudy 25% Rain	Partly Cloudy 28% Rain

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