PORT ARTHUR, TX 77643 Weather Forecast & Current Conditions

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PORT ARTHUR, TX
Current Weather

12:53 AM CDT JUN 30, 2025
Clear
77°F
Feels Like: 78°F
Dewpoint: 75°F
Rel. Hum.: 94%
Visibility: 9 miles
Wind: Calm
Pressure: 30.01 inches
Last 72 hours

Local Area Snow Depth

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PORT ARTHUR, TX 77643
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TODAY
Partly sunny. Highs in the lower 80s. South winds 5 to 10 mph.
TONIGHT
Mostly cloudy. Lows in the upper 60s. South winds 5 to 10 mph.
THURSDAY
Mostly sunny. Highs in the lower 80s. South winds 5 to 10 mph.
THURSDAY NIGHT
Mostly cloudy. Lows in the upper 60s. South winds 5 to 10 mph.
FRIDAY
Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 80s. Northwest winds 5 to 10 mph, becoming northeast in the afternoon. Chance of rain 20 percent.
FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s.
SATURDAY
Mostly sunny. Highs in the upper 70s.
SATURDAY NIGHT AND SUNDAY
Mostly cloudy. Lows in the upper 60s. Highs in the mid 80s.
SUNDAY NIGHT
Mostly cloudy. Cooler with lows in the upper 50s.
MONDAY AND MONDAY NIGHT
Partly cloudy. Highs in the lower 70s. Lows in the lower 50s.
TUESDAY
Sunny. Highs around 70.

Visible Weather Satellite
PORT ARTHUR, TX 77643
Infrared Weather Satellite
PORT ARTHUR, TX 77643
NEXRAD Weather Radar
PORT ARTHUR, TX 77643

PORT ARTHUR, TX 3 hourly weather forecast

weather forecast created  7:00 PM CDT  6/29/2025
Monday
30 JUN 2025
PORT ARTHUR, TX 77643 weather forecast Day 1, 0 hours 1 AM 78° 81° Mostly Cloudy 6%

0% Thunder
( 8% severe)
S   5 91% 75°
Low 77° PORT ARTHUR, TX 77643 weather forecast Day 1, 3 hours 4 AM 78° 81° Partly Cloudy S   3 91% 75°
High 92° PORT ARTHUR, TX 77643 weather forecast Day 1, 6 hours 7 AM 78° 81° Partly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 25% severe)
SSW   2 91% 75°

Partly Cloudy



PORT ARTHUR, TX 77643 weather forecast Day 1, 9 hours 10 AM 86° 96° Partly Cloudy SSW   5 72% 76°
PORT ARTHUR, TX 77643 weather forecast Day 1, 12 hours 1 PM 89° 98° Partly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 36% severe)
SSW   8 61% 74°
PORT ARTHUR, TX 77643 weather forecast Day 1, 15 hours 4 PM 89° 98° Partly Cloudy S   10 61% 74°
PORT ARTHUR, TX 77643 weather forecast Day 1, 18 hours 7 PM 85° 93° Partly Cloudy 3%

0% Thunder
( 10% severe)
S   10 70% 74°
PORT ARTHUR, TX 77643 weather forecast Day 1, 21 hours 10 PM 79° 83° Partly Cloudy SSW   6 88% 75°
Tuesday
1 JUL 2025
PORT ARTHUR, TX 77643 weather forecast Day 2, 0 hours 1 AM 78° 81° Partly Cloudy 3%

0% Thunder
( 8% severe)
SW   3 91% 75°
Low 75° PORT ARTHUR, TX 77643 weather forecast Day 2, 3 hours 4 AM 77° 78° Partly Cloudy WSW   2 94% 75°
High 93° PORT ARTHUR, TX 77643 weather forecast Day 2, 6 hours 7 AM 76° 75° Partly Cloudy 8%

0% Thunder
( 22% severe)
W   2 97% 75°

Partly Cloudy



PORT ARTHUR, TX 77643 weather forecast Day 2, 9 hours 10 AM 85° 95° Partly Cloudy W   3 75% 76°
PORT ARTHUR, TX 77643 weather forecast Day 2, 12 hours 1 PM 89° 98° Partly Cloudy 11%
RAIN
<.01 in
0% Thunder
( 33% severe)
WSW   6 61% 74°
PORT ARTHUR, TX 77643 weather forecast Day 2, 15 hours 4 PM 91° 101° Partly Cloudy SW   8 58% 74°
PORT ARTHUR, TX 77643 weather forecast Day 2, 18 hours 7 PM 87° 95° Partly Cloudy 3%

0% Thunder
( 11% severe)
SSW   8 65% 74°
PORT ARTHUR, TX 77643 weather forecast Day 2, 21 hours 10 PM 80° 85° Partly Cloudy SSW   7 85% 75°

PORT ARTHUR, TX extended weather forecast

Wednesday
2 JUL 2025
Thursday
3 JUL 2025
Friday
4 JUL 2025
Saturday
5 JUL 2025
Sunday
6 JUL 2025
Low 75° Low 75° Low 77° Low 75° Low 75°
High 94° High 95° High 93° High 94° High 91°
PORT ARTHUR, TX 77643 weather forecast Day 3 PORT ARTHUR, TX 77643 weather forecast Day 4 PORT ARTHUR, TX 77643 weather forecast Day 5 PORT ARTHUR, TX 77643 weather forecast Day 6 PORT ARTHUR, TX 77643 weather forecast Day 7
Partly Cloudy
19% Rain
Partly Cloudy
24% Rain
Partly Cloudy
28% Rain
Partly Cloudy
29% Rain
Mostly Cloudy
46% Rain
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