Port Mansfield, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Mansfield, a community in Willacy County, Texas.
Today
77°F
Sunny
Sunny, with a high near 77. Northeast wind around 12 mph.
7-day forecast for Port Mansfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 12 mph NE | 1% |
| Tonight | 67°F | Mostly Clear | 3 to 7 mph E | 1% |
| Thursday | 83°F | Mostly Sunny | 5 to 12 mph SE | 13% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely | 3 to 9 mph S | 71% |
| Friday | 78°F | Chance Rain Showers | 6 to 16 mph N | 53% |
| Friday Night | 65°F | Mostly Cloudy | 7 to 10 mph NNE | 10% |
| Saturday | 76°F | Partly Sunny then Chance Rain Showers | 10 to 14 mph NNE | 25% |
| Saturday Night | 62°F | Chance Rain Showers | 15 mph NNE | 43% |
| Sunday | 71°F | Chance Rain Showers | 15 to 21 mph N | 44% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 14 mph N | 17% |
| Monday | 71°F | Mostly Sunny | 8 to 12 mph NNE | 8% |
| Monday Night | 58°F | Partly Cloudy | 2 to 7 mph NE | 5% |
| Tuesday | 74°F | Partly Sunny | 5 to 8 mph NE | 6% |
| Tuesday Night | 61°F | Mostly Cloudy | 3 to 7 mph ESE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Port Mansfield (26.569, -97.442). Updated through the day.
Growing snapshot for Port Mansfield
Last spring frost
Jan 12
First fall frost
Jan 1
Growing season
362 days
Hardiness zone
10a
More local growing data for Port Mansfield: nearby ZIP 78598 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Port Mansfield, Tx (1.2 mi from Port Mansfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.