Port Lavaca, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Lavaca, a city in Calhoun County, Texas.
Overnight
60°F
Mostly Clear
Mostly clear, with a low around 60. North wind around 7 mph.
7-day forecast for Port Lavaca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Mostly Clear | 7 mph N | 0% |
| Wednesday | 75°F | Sunny | 5 to 9 mph NNE | 0% |
| Wednesday Night | 61°F | Clear | 1 to 5 mph E | 0% |
| Thursday | 77°F | Sunny then Slight Chance Rain Showers | 5 to 9 mph E | 15% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms | 1 to 8 mph NE | 21% |
| Friday | 76°F | Mostly Sunny | 8 to 13 mph N | 4% |
| Friday Night | 60°F | Partly Cloudy | 7 to 10 mph N | 0% |
| Saturday | 73°F | Partly Sunny | 12 mph NNE | 7% |
| Saturday Night | 58°F | Chance Rain Showers | 10 to 16 mph NNE | 26% |
| Sunday | 67°F | Slight Chance Rain Showers then Partly Sunny | 9 to 16 mph NNE | 22% |
| Sunday Night | 54°F | Partly Cloudy | 8 mph NNE | 10% |
| Monday | 68°F | Mostly Sunny | 5 to 8 mph NE | 8% |
| Monday Night | 55°F | Partly Cloudy | 2 to 6 mph ENE | 1% |
| Tuesday | 71°F | Mostly Sunny | 6 mph ENE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Port Lavaca (28.618, -96.628). Updated through the day.
Growing snapshot for Port Lavaca
Last spring frost
Feb 1
First fall frost
Dec 21
Growing season
321 days
Hardiness zone
9b
More local growing data for Port Lavaca: nearby ZIP 77979 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Pt Comfort, Tx (5.1 mi from Port Lavaca). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.