PORT LAVACA, TX 77979 Weather Forecast & Current Conditions
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  77979 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

CALHOUN CNTY ARPT, TX
Current Weather
5:55 AM CDT AUG 18, 2025
Clear
77°F
Feels Like: 78°F
Dewpoint: 75°F
Rel. Hum.: 94%
Visibility: 10 miles
Wind: Calm
Pressure: 29.95 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  77979 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

PORT LAVACA, TX 77979
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
TODAY
Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph, increasing to southeast this afternoon.
TONIGHT
Mostly clear. Lows in the upper 70s. Southeast winds 5 to 10 mph, becoming southwest after midnight.
TUESDAY
Partly cloudy with a chance of showers and thunderstorms. Hot with highs in the mid 90s. Northwest winds around 5 mph, increasing to east in the afternoon. Chance of rain 50 percent.
TUESDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. A chance of showers and thunderstorms. Lows in the upper 70s. Southeast winds 5 to 10 mph, becoming southwest after midnight. Chance of rain 50 percent.
WEDNESDAY
Sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Northwest winds around 5 mph, increasing to east in the afternoon. Chance of rain 40 percent.
WEDNESDAY NIGHT
Mostly clear. Lows in the upper 70s.
THURSDAY
Sunny in the morning, then becoming partly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 50 percent.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. A chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent.
FRIDAY
Partly cloudy with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent.
FRIDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 70s. Chance of rain 50 percent.
SATURDAY
Partly cloudy with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent.
SATURDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the upper 70s. Chance of rain 50 percent.
SUNDAY
Partly cloudy with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent.

  77979 WEATHER SATELLITE LOOPS
Visible Weather Satellite
PORT LAVACA, TX 77979
Infrared Weather Satellite
PORT LAVACA, TX 77979
  77979 WEATHER RADAR LOOP
NEXRAD Weather Radar
PORT LAVACA, TX 77979
 MOS COMPUTER WEATHER FORECAST

CALHOUN CNTY ARPT, TX 3 hourly weather forecast
weather forecast created  7:00 PM CDT  8/17/2025
Monday
18 AUG 2025		 PORT LAVACA, TX 77979 weather forecast Day 1, 0 hours 1 AM 81° 89° Clear 4%

 0% Thunder
( 8% severe)		 S   1 91% 78°
Low 77° PORT LAVACA, TX 77979 weather forecast Day 1, 3 hours 4 AM 79° 83° Partly Cloudy S   1 94% 77°
High 101° PORT LAVACA, TX 77979 weather forecast Day 1, 6 hours 7 AM 78° 81° Partly Cloudy 4%

 0% Thunder
( 14% severe)		   CALM 97% 77°

Partly Cloudy



 PORT LAVACA, TX 77979 weather forecast Day 1, 9 hours 10 AM 91° 109° Partly Cloudy WSW   1 70% 80°
PORT LAVACA, TX 77979 weather forecast Day 1, 12 hours 1 PM 97° 111° Clear 14%
RAIN
<.01 in		 0% Thunder
( 32% severe)		 E   5 51% 76°
PORT LAVACA, TX 77979 weather forecast Day 1, 15 hours 4 PM 98° 109° Partly Cloudy ESE   8 46% 74°
PORT LAVACA, TX 77979 weather forecast Day 1, 18 hours 7 PM 93° 105° Clear 6%

 0% Thunder
( 11% severe)		 SE   7 56% 75°
PORT LAVACA, TX 77979 weather forecast Day 1, 21 hours 10 PM 84° 94° Clear SSE   2 80% 77°
Tuesday
19 AUG 2025		 PORT LAVACA, TX 77979 weather forecast Day 2, 0 hours 1 AM 81° 88° Partly Cloudy 9%

 0% Thunder
( 17% severe)		   CALM 88% 77°
Low 77° PORT LAVACA, TX 77979 weather forecast Day 2, 3 hours 4 AM 79° 83° Partly Cloudy   CALM 91% 76°
High 99° PORT LAVACA, TX 77979 weather forecast Day 2, 6 hours 7 AM 78° 81° Partly Cloudy 20%
RAIN
<.01 in		 0% Thunder
( 29% severe)		 NW   1 94% 76°

Partly Cloudy

Chance of Rain

 PORT LAVACA, TX 77979 weather forecast Day 2, 9 hours 10 AM 89° 105° Partly Cloudy NNW   2 73% 79°
PORT LAVACA, TX 77979 weather forecast Day 2, 12 hours 1 PM 94° 107° Partly Cloudy 39%
RAIN
***		 0% Thunder
( 44% severe)		 ENE   5 56% 76°
PORT LAVACA, TX 77979 weather forecast Day 2, 15 hours 4 PM 95° 107° Mostly Cloudy E   5 53% 75°
PORT LAVACA, TX 77979 weather forecast Day 2, 18 hours 7 PM 90° 102° Partly Cloudy 16%
RAIN
.01–.1 in		 0% Thunder
( 20% severe)		 ESE   5 64% 76°
PORT LAVACA, TX 77979 weather forecast Day 2, 21 hours 10 PM 84° 94° Partly Cloudy SSE   1 80% 77°

CALHOUN CNTY ARPT, TX extended weather forecast
Wednesday
20 AUG 2025		 Thursday
21 AUG 2025		 Friday
22 AUG 2025		 Saturday
23 AUG 2025		 Sunday
24 AUG 2025
Low 77° Low 78° Low 76° Low 77° Low 76°
High 98° High 95° High 92° High 94° High 95°
PORT LAVACA, TX 77979 weather forecast Day 3 PORT LAVACA, TX 77979 weather forecast Day 4 PORT LAVACA, TX 77979 weather forecast Day 5 PORT LAVACA, TX 77979 weather forecast Day 6 PORT LAVACA, TX 77979 weather forecast Day 7
Partly Cloudy
22% Rain		 Mostly Cloudy
55% Rain		 Overcast
66% Rain		 Partly Cloudy
52% Rain		 Partly Cloudy
41% Rain
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