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
5:15 PM CDT MAY 20, 2026
Overcast
82°F
Feels Like: 89°F
Dewpoint: 75°F
Rel. Hum.: 79%
Visibility: 10 miles
Wind: ESE at 8 mph
Pressure: 29.89 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Regional Weather Maps

(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
TONIGHT
Mostly cloudy. Lows in the mid 70s. East winds 5 to 10 mph.
THURSDAY
A chance of thunderstorms. Showers. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the morning. Highs in the lower 80s. Southeast winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Chance of rain 90 percent.
THURSDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 50 percent.
FRIDAY
Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. South winds 5 to 10 mph. Chance of rain 50 percent.
FRIDAY NIGHT
Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 70s. Southeast winds 5 to 10 mph. Chance of rain 50 percent.
SATURDAY
Showers and thunderstorms likely. Highs in the mid 80s. Chance of rain 70 percent.
SATURDAY NIGHT
A chance of thunderstorms. Showers. Some thunderstorms may produce heavy rainfall. Lows in the mid 70s. Chance of rain 90 percent.
SUNDAY
A chance of thunderstorms. Showers, mainly in the morning. Some thunderstorms may produce heavy rainfall. Highs in the mid 80s. Chance of rain 90 percent.
SUNDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms after midnight. Some thunderstorms may produce heavy rainfall after midnight. Lows in the mid 70s. Chance of rain 50 percent.
MEMORIAL DAY
Mostly cloudy in the morning, then becoming partly cloudy. A chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the mid 80s. Chance of rain 50 percent.
MONDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the mid 70s. Chance of rain 40 percent.
TUESDAY
Partly cloudy. A chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 40 percent.
TUESDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 70s. Chance of rain 30 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 AM CDT  5/20/2026
Wednesday
20 MAY 2026		 PORT LAVACA, TX 77979 weather forecast Day 1, 12 hours 1 PM 85° 95° Mostly Cloudy 16%
RAIN
.5–1 in		 0% Thunder
( 21% severe)		 ESE   12 75% 76°
High 86° PORT LAVACA, TX 77979 weather forecast Day 1, 15 hours 4 PM 85° 95° Mostly Cloudy ESE   13 75% 76°
Mostly Cloudy



 PORT LAVACA, TX 77979 weather forecast Day 1, 18 hours 7 PM 82° 89° Mostly Cloudy 10%
RAIN
<.01 in		 0% Thunder
( 13% severe)		 ESE   12 82% 76°
PORT LAVACA, TX 77979 weather forecast Day 1, 21 hours 10 PM 79° 83° Mostly Cloudy ESE   8 91% 76°
Thursday
21 MAY 2026		 PORT LAVACA, TX 77979 weather forecast Day 2, 0 hours 1 AM 79° 83° Mostly Cloudy 35%
RAIN
.25–.5 in		 0% Thunder
( 30% severe)		 ESE   8 91% 76°
Low 75° PORT LAVACA, TX 77979 weather forecast Day 2, 3 hours 4 AM 77° 78° Mostly Cloudy ESE   7 94% 75°
High 84° PORT LAVACA, TX 77979 weather forecast Day 2, 6 hours 7 AM 76° 76° Mostly Cloudy 56%
RAIN
***		 0% Thunder
( 39% severe)		 ESE   6 94% 74°

Mostly Cloudy

Rain Likely

 PORT LAVACA, TX 77979 weather forecast Day 2, 9 hours 10 AM 77° 78° Mostly Cloudy ESE   10 97% 76°
PORT LAVACA, TX 77979 weather forecast Day 2, 12 hours 1 PM 80° 85° Mostly Cloudy 52%
RAIN
***		 0% Thunder
( 52% severe)		 SE   14 88% 76°
PORT LAVACA, TX 77979 weather forecast Day 2, 15 hours 4 PM 81° 87° Mostly Cloudy SSE   13 82% 75°
PORT LAVACA, TX 77979 weather forecast Day 2, 18 hours 7 PM 79° 83° Mostly Cloudy 37%
RAIN
***		 0% Thunder
( 29% severe)		 SSE   10 91% 76°
PORT LAVACA, TX 77979 weather forecast Day 2, 21 hours 10 PM 77° 78° Mostly Cloudy SSE   7 94% 75°
Friday
22 MAY 2026		 PORT LAVACA, TX 77979 weather forecast Day 3, 0 hours 1 AM 76° 75° Mostly Cloudy 31%
RAIN
1–2 in		 0% Thunder
( 25% severe)		 SSE   7 97% 75°
Low 74° PORT LAVACA, TX 77979 weather forecast Day 3, 3 hours 4 AM 76° 75° Mostly Cloudy S   7 97% 75°
High 88° PORT LAVACA, TX 77979 weather forecast Day 3, 6 hours 7 AM 75° 75° Mostly Cloudy 40%
RAIN
***		 0% Thunder
( 28% severe)		 S   8 97% 74°

Mostly Cloudy

Rain Likely

 PORT LAVACA, TX 77979 weather forecast Day 3, 9 hours 10 AM 81° 88° Mostly Cloudy S   10 88% 77°
PORT LAVACA, TX 77979 weather forecast Day 3, 15 hours 1 PM 84° 94° Mostly Cloudy 53%
RAIN
***		 0% Thunder
( 46% severe)		 S   14 80% 77°
PORT LAVACA, TX 77979 weather forecast Day 3, 18 hours 4 PM 84° 94° Mostly Cloudy S   13 80% 77°
PORT LAVACA, TX 77979 weather forecast Day 3, 21 hours 7 PM 81° 88° Mostly Cloudy     SSE   10 88% 77°

CALHOUN CNTY ARPT, TX extended weather forecast
Saturday
23 MAY 2026		 Sunday
24 MAY 2026		 Monday
25 MAY 2026		 Tuesday
26 MAY 2026		 Wednesday
27 MAY 2026
Low 75° Low 72° Low 73° Low 73° Low 75°
High 82° High 87° High 89° High 90° High 86°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
75% Rain		 Overcast
72% Rain		 Partly Cloudy
35% Rain		 Partly Cloudy
30% Rain		 Overcast
41% Rain
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