Port Arthur, TX Weather & Growing Conditions
Tonight
61°F
Showers And Thunderstorms Likely then Mostly Cloudy
Showers and thunderstorms likely before midnight. Mostly cloudy, with a low around 61. Northwest wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Showers And Thunderstorms Likely then Mostly Cloudy | 10 mph NW | 67% |
| Wednesday | 74°F | Sunny | 5 to 10 mph N | 0% |
| Wednesday Night | 60°F | Clear | 0 to 5 mph NE | 1% |
| Thursday | 76°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph E | 24% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms | 5 mph W | 37% |
| Friday | 76°F | Mostly Sunny | 5 to 10 mph N | 9% |
| Friday Night | 58°F | Partly Cloudy | 5 to 15 mph N | 2% |
| Saturday | 72°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph NE | 15% |
| Saturday Night | 55°F | Slight Chance Rain Showers | 10 to 15 mph N | 21% |
| Sunday | 69°F | Slight Chance Rain Showers then Mostly Sunny | 10 to 15 mph N | 15% |
| Sunday Night | 54°F | Mostly Clear | 10 mph N | 4% |
| Monday | 70°F | Sunny | 5 to 10 mph NE | 3% |
| Monday Night | 55°F | Mostly Clear | 5 mph NE | 2% |
| Tuesday | 71°F | Sunny | 5 to 10 mph E | 2% |
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 Nov 4, 2026.