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Marrero, Louisianna 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Marrero LA
National Weather Service Forecast for: Marrero LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 1:21 pm CDT Jul 25, 2025
 
This
Afternoon
This Afternoon: Showers and thunderstorms likely.  Partly sunny, with a high near 90. Heat index values as high as 105. South wind around 15 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely
Tonight

Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am.  Mostly cloudy, with a low around 79. Southeast wind 5 to 10 mph.  Chance of precipitation is 30%.
Chance
T-storms
Saturday

Saturday: Showers and thunderstorms, mainly before 3pm.  High near 91. South wind 5 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms then
T-storms
Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 79. South wind around 5 mph becoming calm  in the evening.
Chance
T-storms then
Partly Cloudy
Sunday

Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 10am.  Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.  Chance of precipitation is 40%.
Chance
T-storms
Sunday
Night
Sunday Night: Clear, with a low around 78. South wind around 5 mph becoming calm  in the evening.
Clear

Monday

Monday: A 20 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 95. Northwest wind around 5 mph.
Sunny then
Slight Chance
T-storms
Monday
Night
Monday Night: Mostly clear, with a low around 81. Calm wind becoming northwest around 5 mph after midnight.
Mostly Clear

Tuesday

Tuesday: A chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 96. North wind around 5 mph.
Sunny then
Chance
T-storms
Hi 90 °F Lo 79 °F Hi 91 °F Lo 79 °F Hi 93 °F Lo 78 °F Hi 95 °F Lo 81 °F Hi 96 °F

 

This Afternoon
 
Showers and thunderstorms likely. Partly sunny, with a high near 90. Heat index values as high as 105. South wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 79. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday
 
Showers and thunderstorms, mainly before 3pm. High near 91. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 79. South wind around 5 mph becoming calm in the evening.
Sunday
 
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 40%.
Sunday Night
 
Clear, with a low around 78. South wind around 5 mph becoming calm in the evening.
Monday
 
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Northwest wind around 5 mph.
Monday Night
 
Mostly clear, with a low around 81. Calm wind becoming northwest around 5 mph after midnight.
Tuesday
 
A chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 96. North wind around 5 mph.
Tuesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Northwest wind around 5 mph becoming calm.
Wednesday
 
Showers and thunderstorms likely. Partly sunny, with a high near 93. Northwest wind around 5 mph becoming southeast in the afternoon.
Wednesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 78. Southwest wind around 5 mph becoming calm in the evening.
Thursday
 
Showers and thunderstorms. Partly sunny, with a high near 91. Southwest wind around 5 mph.
Thursday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 78. South wind around 5 mph.
Friday
 
Showers and thunderstorms. Partly sunny, with a high near 91. West wind around 5 mph.

 

Forecast from NOAA-NWS for Marrero LA.

Weather Forecast Discussion
624
FXUS64 KLIX 251911
AFDLIX

Area Forecast Discussion
National Weather Service New Orleans LA
211 PM CDT Fri Jul 25 2025

...New SHORT TERM, LONG TERM, AVIATION, MARINE...

.SHORT TERM...
(This evening through Saturday night)
Issued at 200 PM CDT Fri Jul 25 2025

Low pressure/inverted trough continuing to move westward over the
Gulf, currently southwest of Morgan City. Scattered showers and
thunderstorms moving northwestward with most near and north of
the Interstate 10/12 corridors. Certainly still potential for
areas south of that, but not imminent. A little more wind than has
been the case the last several days, with winds around 15 mph and
gusts to around 25 mph. Temperatures away from precipitation
running from mid 80s to lower 90s. Heat index values near 105
degrees in the hotter spots.

Trough will move to the Texas coast by Saturday morning as an
upper ridge moves westward. By Saturday morning, the ridge will be
centered over South Carolina, and by Sunday morning over Georgia.
Precipitable water values will drop a bit to 2.1 inches by
tomorrow, which should lead to somewhat less instantaneous areal
coverage of showers and storms, but the 12 hour PoP will likely
still need to be 60 percent or higher for much of the area.  High
temperatures should more uniformly reach the lower 90s tomorrow,
with heat index values approaching Heat Advisory criteria. Will
hold off on issuing an advisory for now, as confidence not quite
high enough to justify advisory yet.

&&

.LONG TERM...
(Sunday through Thursday night)
Issued at 200 PM CDT Fri Jul 25 2025

Drier air still scheduled to arrive Sunday as ridging continues to
move westward. Ridge center will be over Alabama Sunday afternoon,
northern Mississippi on Monday, and near Tulsa by Wednesday. That
will be far enough west to allow another easterly wave to transit
the northern Gulf during the second half of the workweek.

Precipitable water values are expected to fall into the 1.6 to 1.8
range for the early part of the week, before rebounding to 2.25
inches on Wednesday. This will mean a decrease in areal coverage
of thunderstorms beginning on Sunday. Instantaneous areal coverage
probably won`t be much more than 20 percent or so on Sunday, with
12 hourly PoPs of 20 to 40 percent, which may be a bit high. For
Monday and Tuesday, convection should be suppressed even further,
with not much more than 20 percent for the day, if that much. By
Wednesday and Thursday, precipitation chances will increase into
the 40 to 60 percent range again.

With the drier weather for Sunday through Tuesday, high
temperatures will increase again. Highs are expected to be in the
mid 90s across most of the area on Sunday. The ridge being more
fully over the area Monday should allow highs in the upper 90s,
especially if surface winds maintain a northerly component.
Similar highs are expected on Tuesday. It should be noted that 100
degree temperatures aren`t out of the question either Monday or
Tuesday in a few areas. Pretty much the only question for Sunday
through Tuesday are what flavor of heat headlines are necessary.
Sunday should be almost entirely advisory criteria, but Monday and
Tuesday may necessitate Extreme Heat Warnings, especially along
the Interstate 10 and 12 corridors. We would probably start
issuing some of those products tomorrow afternoon. The heat should
break with the arrival of showers and thunderstorms Wednesday.

&&

.AVIATION...
(18Z TAFS)
Issued at 200 PM CDT Fri Jul 25 2025

Scattered showers and thunderstorms will produce occasional MVFR
ceilings and potentially IFR or lower visibilities this afternoon,
with most of the convection dissipating around sunset. Beyond that
point, the main question is whether the precipitation occurs late
enough in the day at specific terminals to aid the development of
low clouds/fog around sunrise, as happened at a few terminals this
morning. Won`t rule it out at this point, but do not have enough
confidence to put it as a prevailing condition at any of the
terminals. Convective development on Saturday should remain
isolated to scattered, and will only use PROB30 for the late
morning and afternoon hours.

&&

.MARINE...
Issued at 200 PM CDT Fri Jul 25 2025

Earlier issuance included Small Craft Exercise Caution headlines
for the open waters until midnight CDT. Somewhat borderline for
the sounds, and did not carry there. Wind speeds should diminish
this evening, and then remain near or below 10 knots for much of
the remainder of the forecast period outside of thunderstorms.
Areal coverage of storms will be much lower beyond tomorrow
afternoon, with not much more than isolated storms Sunday through
Tuesday. The second half of the workweek next week will see more
widespread coverage of storms than the first half of the week.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  74  90  73  93 /  30  70   0  20
BTR  76  91  76  94 /  30  80   0  40
ASD  75  91  74  93 /  30  70  10  20
MSY  79  92  79  94 /  30  80  10  40
GPT  77  89  77  92 /  40  60  10  20
PQL  76  91  75  94 /  50  60  10  20

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...None.
MS...None.
GM...None.
&&

$$

SHORT TERM...RW
LONG TERM....RW
AVIATION...RW
MARINE...RW
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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