Harman US

Port Lavaca, TX Weather & Growing Conditions

This Afternoon
89°F
Sunny
Sunny, with a high near 89. Heat index values as high as 99. East southeast wind 8 to 14 mph, with gusts as high as 18 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 89°F Sunny 8 to 14 mph ESE 8%
Tonight 79°F Mostly Clear 3 to 14 mph SE 1%
Sunday 89°F Sunny 3 to 13 mph E 10%
Sunday Night 80°F Partly Cloudy 3 to 13 mph SE 2%
Monday 90°F Slight Chance Showers And Thunderstorms 3 to 12 mph ESE 19%
Monday Night 80°F Slight Chance Showers And Thunderstorms then Clear 2 to 12 mph SE 19%
Tuesday 91°F Sunny 2 to 12 mph E 13%
Tuesday Night 80°F Mostly Clear 0 to 12 mph E 13%
Wednesday 91°F Sunny then Slight Chance Showers And Thunderstorms 5 to 15 mph ENE 21%
Wednesday Night 80°F Slight Chance Showers And Thunderstorms then Mostly Clear 5 to 15 mph E 21%
Thursday 90°F Sunny then Slight Chance Showers And Thunderstorms 7 to 16 mph ENE 18%
Thursday Night 79°F Slight Chance Showers And Thunderstorms then Mostly Clear 6 to 17 mph E 18%
Friday 90°F Sunny then Slight Chance Showers And Thunderstorms 8 to 15 mph ENE 15%
Friday Night 78°F Slight Chance Showers And Thunderstorms then Mostly Clear 6 to 15 mph E 15%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Port Lavaca, TX

Last spring frost
Feb 1
First fall frost
Dec 21
Growing season
321 days
Hardiness zone
9b

Explore more for Port Lavaca, TX: full frost dates · planting calendar · Texas frost dates

Climate data from the nearest NOAA station, Pt Comfort, Tx (5.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.