Southwest Pass, Mississippi River, LA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Wed
Jul 29 		Partly Cloudy
Close Hourly 		-º / 83º 12% W 14 mph 75%
9pm Partly Cloudy 86º 2% W 14 mph 69%
10pm Partly Cloudy 86º 2% W 14 mph 70%
11pm Partly Cloudy 86º 2% W 14 mph 72%
Thu
Jul 30 		Partly Cloudy
View Hourly 		87º / 83º 22% W 15 mph 77%
12am Partly Cloudy 85º 2% W 14 mph 77%
1am Partly Cloudy 85º 2% W 13 mph 77%
2am Partly Cloudy 85º 3% W 12 mph 78%
3am Partly Cloudy 85º 6% W 12 mph 79%
4am Mostly Cloudy 84º 10% W 12 mph 79%
5am Mostly Cloudy 84º 13% W 12 mph 79%
6am Mostly Cloudy 84º 9% WNW 11 mph 79%
7am Mostly Cloudy 84º 12% WNW 11 mph 81%
8am Mostly Cloudy 85º 21% WNW 12 mph 79%
9am Mostly Cloudy 85º 22% WNW 12 mph 77%
10am Partly Cloudy 85º 22% WNW 13 mph 79%
11am Partly Cloudy 85º 13% WNW 12 mph 77%
12pm Partly Cloudy 85º 6% W 11 mph 77%
1pm Mostly Sunny 86º 6% W 11 mph 77%
2pm Partly Cloudy 85º 6% W 12 mph 78%
3pm Mostly Sunny 86º 6% WSW 13 mph 75%
4pm Partly Cloudy 86º 5% WSW 13 mph 75%
5pm Partly Cloudy 86º 5% WSW 15 mph 75%
6pm Partly Cloudy 87º 5% WSW 15 mph 74%
7pm Partly Cloudy 86º 5% WSW 14 mph 75%
8pm Partly Cloudy 85º 5% WSW 13 mph 78%
9pm Mostly Cloudy 85º 5% WSW 12 mph 78%
10pm Mostly Cloudy 85º 5% WSW 12 mph 79%
11pm Partly Cloudy 85º 5% WSW 13 mph 78%
Fri
Jul 31 		Partly Cloudy
View Hourly 		87º / 83º 23% WSW 15 mph 74%
12am Mostly Cloudy 85º 5% WSW 13 mph 77%
1am Partly Cloudy 85º 6% WSW 13 mph 77%
2am Mostly Cloudy 84º 11% WSW 12 mph 78%
3am Mostly Cloudy 84º 6% WSW 12 mph 77%
4am Mostly Cloudy 84º 7% WSW 12 mph 79%
5am Mostly Cloudy 84º 6% WSW 12 mph 78%
6am Mostly Cloudy 84º 9% WSW 11 mph 78%
7am Mostly Cloudy 84º 17% WSW 11 mph 78%
8am Mostly Cloudy 85º 14% W 13 mph 77%
9am Mostly Cloudy 85º 11% W 14 mph 75%
10am Mostly Cloudy 85º 11% W 14 mph 75%
11am Mostly Cloudy 85º 24% W 14 mph 74%
12pm Partly Cloudy 85º 10% W 14 mph 74%
1pm Partly Cloudy 86º 13% WSW 14 mph 74%
2pm Partly Cloudy 86º 9% WSW 14 mph 74%
3pm Mostly Cloudy 86º 6% WSW 14 mph 71%
4pm Mostly Cloudy 86º 4% WSW 13 mph 70%
5pm Mostly Cloudy 86º 4% WSW 14 mph 71%
6pm Cloudy 87º 4% WSW 15 mph 70%
7pm Cloudy 86º 4% WSW 14 mph 72%
8pm Cloudy 85º 4% WSW 13 mph 77%
Sat
Aug 1 		Partly Cloudy 87º / 81º 24% WSW 18 mph 75%
Sun
Aug 2 		Thunderstorms 85º / 79º 93% WSW 19 mph 79%
Mon
Aug 3 		Thundershowers 85º / 81º 78% WSW 13 mph 77%
Tue
Aug 4 		AM Showers 85º / 81º 57% WSW 10 mph 75%
Wed
Aug 5 		Showers 86º / 81º 47% S 7 mph 71%

Weather Radar for Southwest Pass, Mississippi River, LA See Radar

See Radar Map

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Southwest Pass, Mississippi River, LA

Tonight
Low : 84ºF
W wind 10 to 15 kt. Mostly cloudy. Seas around 2 ft.
Thursday
High : 89ºF
WNW wind 10 to 15 kt. Partly sunny, then gradually becoming sunny. Seas around 1 ft.
Thursday Night
Low : 83ºF
WSW wind 10 to 15 kt. A slight chance of showers and thunderstorms after 1am. Seas around 2 ft.
Friday
High : 89ºF
WSW wind 10 to 15 kt. Mostly sunny. Seas 1 to 2 ft.
Friday Night
Low : 83ºF
WSW wind 10 to 15 kt. Mostly cloudy. Seas 1 to 2 ft.
Saturday
High : 89ºF
WSW wind around 15 kt. A chance of showers and thunderstorms, mainly after 1pm. Seas around 2 ft.
Saturday Night
Low : 81ºF
WSW wind around 15 kt. Showers and thunderstorms likely, mainly after 1am. Seas around 2 ft.
Sunday
High : 88ºF
W wind around 15 kt. Showers and thunderstorms. Seas around 2 ft.
Sunday Night
Low : 80ºF
WSW wind around 15 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Seas around 2 ft.

NOAA Buoy Data Near Southwest Pass, Mississippi River, LA See Map

Loading Map...
Loading Buoy Data...

    Wind Speed Forecast for Southwest Pass, Mississippi River, LA

    ThursdayFriday
    Wind Speed (MPH) 141312121115121312141414
    2am6am10am2pm6pm10pm2am6am10am2pm6pm10pm
    MPH 141312121115121312141414
    DIR WWWWNWWWSWWSWWSWWSWWWSWWSW

    Current Weather Conditions In Southwest Pass, Mississippi River, LA

    As Of: 54 minutes ago

    • 86ºF
    • 95ºF
    • 14mph
    • 0º (W)
    • 14mph
    • Partly Cloudy
    • 10mi
    • 29.89"
    • 69%
    • 0ºF

    The weather right now in Southwest Pass, Mississippi River, LA is Partly Cloudy. The current temperature is 86°F, and the expected high and low for today, Wednesday, July 29, 2026, are -° high temperature and 83°F low temperature. The wind is currently blowing at 14 miles per hour, and coming from the West. The wind is gusting to 14 mph. With the wind and the atmosphere the temperature feels like 95° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 69 percent, and air pressure at 29.89 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Heat Advisory - 8:03pm Wed Jul 29 2026

    ...HEAT ADVISORY HAS EXPIRED... ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 7 PM CDT THURSDAY...

    WHAT: Heat index values up to 110 expected.

    WHERE: Portions of southeast Louisiana and southern Mississippi.

    WHEN: From 11 AM to 7 PM CDT Thursday.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to early morning
    or evening. Take action when you see symptoms of heat exhaustion and
    heat stroke.

    To reduce risk during outdoor work, the Occupational Safety and
    Health Administration recommends scheduling frequent rest breaks in
    shaded or air conditioned environments. Anyone overcome by heat
    should be moved to a cool and shaded location. Heat stroke is an
    emergency! Call 9 1 1.

    &&