Port Arthur, TX Weather & Growing Conditions
Today
90°F
Sunny
Sunny, with a high near 90. Heat index values as high as 101. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Sunny | 5 to 10 mph SW | 15% |
| Tonight | 81°F | Mostly Clear | 5 to 10 mph SW | 4% |
| Wednesday | 90°F | Sunny | 5 to 10 mph SW | 14% |
| Wednesday Night | 81°F | Mostly Clear | 5 to 10 mph S | 1% |
| Thursday | 89°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 23% |
| Thursday Night | 80°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 10 mph S | 23% |
| Friday | 89°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 25% |
| Friday Night | 79°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 25% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 23% |
| Saturday Night | 80°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 21% |
| Sunday | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 44% |
| Sunday Night | 80°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 37% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 55% |
| Monday Night | 80°F | Chance Showers And Thunderstorms | 10 mph S | 40% |
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 (17.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.