Port Arthur, TX Weather & Growing Conditions
Today
94°F
Sunny
Sunny, with a high near 94. Heat index values as high as 102. South wind 0 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 0 to 10 mph S | 14% |
| Tonight | 79°F | Mostly Clear | 0 to 10 mph SW | 9% |
| Wednesday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SW | 23% |
| Wednesday Night | 78°F | Mostly Clear | 0 to 10 mph S | 5% |
| Thursday | 93°F | Sunny then Chance Showers And Thunderstorms | 0 to 10 mph S | 32% |
| Thursday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 10 mph S | 32% |
| Friday | 92°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Friday Night | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Saturday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 29% |
| Saturday Night | 78°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 29% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 0 to 10 mph SE | 46% |
| Sunday Night | 78°F | Chance Showers And Thunderstorms | 0 to 10 mph S | 46% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 to 10 mph S | 50% |
| Monday Night | 78°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 50% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Port Arthur, TX
Last spring frost
Feb 14
First fall frost
Dec 7
Growing season
301 days
Hardiness zone
9b
Explore more for Port Arthur, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Port Arthur Se Tx Ap, Tx (6.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.