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
93°F
Sunny
Sunny, with a high near 93. Heat index values as high as 110. South southeast wind 9 to 21 mph, with gusts as high as 28 mph.
7-day forecast for Port Mansfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 93°F | Sunny | 9 to 21 mph SSE | 2% |
| Tonight | 79°F | Mostly Clear | 10 to 20 mph SE | 1% |
| Wednesday | 93°F | Sunny | 10 to 18 mph SE | 1% |
| Wednesday Night | 79°F | Mostly Clear | 7 to 17 mph SE | 1% |
| Thursday | 93°F | Sunny | 7 to 18 mph SE | 5% |
| Thursday Night | 78°F | Mostly Clear | 6 to 17 mph SE | 5% |
| Friday | 92°F | Sunny | 5 to 15 mph SE | 12% |
| Friday Night | 77°F | Mostly Clear | 2 to 14 mph SE | 12% |
| Saturday | 91°F | Sunny | 0 to 13 mph SE | 6% |
| Saturday Night | 78°F | Mostly Clear | 3 to 13 mph SE | 6% |
| Sunday | 91°F | Sunny | 2 to 14 mph SE | 11% |
| Sunday Night | 78°F | Mostly Clear | 6 to 14 mph SE | 10% |
| Monday | 93°F | Sunny | 6 to 20 mph SE | 5% |
| Monday Night | 79°F | Mostly Clear | 10 to 18 mph SSE | 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 Aug 4, 2026.