Port Isabel, TX Weather & Growing Conditions
Overnight
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 72. North northwest wind 3 to 13 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Chance Rain Showers | 3 to 13 mph NNW | 36% |
| Wednesday | 80°F | Mostly Sunny | 10 to 14 mph NNE | 11% |
| Wednesday Night | 70°F | Mostly Clear | 2 to 8 mph E | 1% |
| Thursday | 86°F | Sunny | 5 to 13 mph SSE | 8% |
| Thursday Night | 72°F | Partly Cloudy then Showers And Thunderstorms Likely | 2 to 8 mph SSW | 58% |
| Friday | 80°F | Showers And Thunderstorms Likely | 5 to 18 mph N | 64% |
| Friday Night | 69°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 13 mph NNE | 16% |
| Saturday | 78°F | Chance Rain Showers | 10 to 16 mph NNE | 31% |
| Saturday Night | 66°F | Chance Rain Showers | 10 to 15 mph NNE | 49% |
| Sunday | 74°F | Showers And Thunderstorms Likely | 16 to 21 mph N | 56% |
| Sunday Night | 61°F | Slight Chance Rain Showers | 10 to 21 mph N | 19% |
| Monday | 74°F | Mostly Sunny | 10 to 15 mph N | 10% |
| Monday Night | 62°F | Mostly Cloudy | 2 to 8 mph NNE | 4% |
| Tuesday | 77°F | Partly Sunny | 5 to 12 mph NE | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Port Isabel, TX
Last spring frost
Jan 3
First fall frost
Jan 1
Growing season
365 days
Hardiness zone
10a
Explore more for Port Isabel, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Port Isabel, Tx (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.