Marine Weather and Tide Forecast for Montegut, LA
April 23, 2025 9:59 PM CDT (02:59 UTC)
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![]() | Sunrise 6:26 AM Sunset 7:35 PM Moonrise 2:45 AM Moonset 2:15 PM |
GMZ550 Coastal Waters From Port Fourchon La To Lower Atchafalaya River La Out 20 Nm- Coastal Waters From The Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Nm- 324 Pm Cdt Wed Apr 23 2025
Tonight - Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 6 seconds.
Thursday - Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 6 seconds.
Thursday night - Southeast winds around 10 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 6 seconds.
Friday - Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 7 seconds.
Friday night - Southeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 7 seconds.
Saturday - East winds 5 to 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 6 seconds.
Saturday night - Southeast winds around 5 knots. Seas around 2 feet. Wave detail: south 2 feet at 6 seconds.
Sunday - Southeast winds around 5 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 6 seconds.
Sunday night - South winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 7 seconds.
Monday - Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 6 seconds.
Monday night - Southeast winds around 10 knots. Seas 2 to 3 feet.
GMZ500 324 Pm Cdt Wed Apr 23 2025
Synopsis for pascagoula to atchafalaya river out 60 nm -
onshore flow will primarily be the rule into early next week, although diurnal land breeze and sea breeze cycles can alter wind direction temporarily along the immediate coast over the weekend. Winds will remain below 15 knots through the weekend with lower rain chances.
onshore flow will primarily be the rule into early next week, although diurnal land breeze and sea breeze cycles can alter wind direction temporarily along the immediate coast over the weekend. Winds will remain below 15 knots through the weekend with lower rain chances.
7 Day Forecast for Marine Location Near Montegut, LA

NEW! Add second zone forecast
Cocodrie Click for Map Wed -- 03:45 AM CDT Moonrise Wed -- 06:27 AM CDT Sunrise Wed -- 06:30 AM CDT 0.12 feet Low Tide Wed -- 03:15 PM CDT Moonset Wed -- 04:55 PM CDT 0.78 feet High Tide Wed -- 05:22 PM CDT 0.78 feet Low Tide Wed -- 07:34 PM CDT Sunset Wed -- 09:06 PM CDT 0.79 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Cocodrie, Terrebonne Bay, Louisiana, Tide feet
12 am |
0.7 |
1 am |
0.6 |
2 am |
0.5 |
3 am |
0.3 |
4 am |
0.2 |
5 am |
0.2 |
6 am |
0.1 |
7 am |
0.1 |
8 am |
0.2 |
9 am |
0.3 |
10 am |
0.4 |
11 am |
0.5 |
12 pm |
0.6 |
1 pm |
0.7 |
2 pm |
0.7 |
3 pm |
0.8 |
4 pm |
0.8 |
5 pm |
0.8 |
6 pm |
0.8 |
7 pm |
0.8 |
8 pm |
0.8 |
9 pm |
0.8 |
10 pm |
0.8 |
11 pm |
0.8 |
Pelican Islands Click for Map Wed -- 03:44 AM CDT Moonrise Wed -- 06:27 AM CDT Sunrise Wed -- 07:10 AM CDT 0.07 feet Low Tide Wed -- 03:14 PM CDT Moonset Wed -- 07:33 PM CDT Sunset Wed -- 08:58 PM CDT 0.81 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Pelican Islands, Timbalier Bay, Mississippi River Delta, Louisiana, Tide feet
12 am |
0.7 |
1 am |
0.6 |
2 am |
0.5 |
3 am |
0.3 |
4 am |
0.2 |
5 am |
0.1 |
6 am |
0.1 |
7 am |
0.1 |
8 am |
0.1 |
9 am |
0.1 |
10 am |
0.2 |
11 am |
0.3 |
12 pm |
0.4 |
1 pm |
0.4 |
2 pm |
0.5 |
3 pm |
0.6 |
4 pm |
0.6 |
5 pm |
0.7 |
6 pm |
0.7 |
7 pm |
0.8 |
8 pm |
0.8 |
9 pm |
0.8 |
10 pm |
0.8 |
11 pm |
0.8 |
Area Discussion for New Orleans/Baton Rouge, LA
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FXUS64 KLIX 232055 AFDLIX
Area Forecast Discussion National Weather Service New Orleans LA 355 PM CDT Wed Apr 23 2025
New SHORT TERM, LONG TERM, AVIATION, MARINE
SHORT TERM
(This evening through Thursday night)
Issued at 328 PM CDT Wed Apr 23 2025
The weak shortwave parade continues across the northern Gulf Coast which is aiding in some pop-up showers and storms. One or two of these have gotten tall enough with aid from boundary interactions to produce some stronger downdrafts and small hail, but overall these storms have been just producing brief downpours. Expect the cold pooling and lake breeze interactions to continue to produce more of these pop-ups moving westward through Baton Rouge metro over the next couple hours.
Rain chances fall rapidly overnight as daytime heating and associated atmospheric instability diminishes. Ample moisture in the low-levels and saturated soils will enable more patchy fog development tonight with highest probabilities across the Florida Parishes and Southwest MS, particularly between Baton Rouge and McComb. Dense fog probabilities remain below 30% and though a brief period of patchy dense fog cannot be ruled out near sunrise, confidence is medium that conditions will not warrant any dense fog products for this forecast cycle.
Expect more of the same tomorrow with warm, moist air entrenched over the area and pop-up showers and storms predominantly north of the I-10/12 corridor. However, coverage should be relatively more isolated than the days prior. Similar conditions Thursday night could lead to patchy fog development again into the early morning hours on Friday for northern areas, especially the river basins and areas north of I-10/12.
LONG TERM
(Friday through Tuesday night)
Issued at 328 PM CDT Wed Apr 23 2025
The longwave pattern gradually amplifies from the more zonal structure currently present across CONUS as a trough digs across the western CONUS and amplifies the ridging over the central CONUS. Rising mid-upper heights and temperatures will taper off rain chances for most of the area with warm, moist conditions settling in for the foreseeable future
Lows will be in the mid 60s to low 70s each night and highs will be gradually trend from the mid 80s to near 90F by Sunday. This is largely a product of warming mid-level temps and decreasing cloud cover. As a result, risk of sun exposure and heat-related illnesses will increase into the weekend especially for those seeking outdoor activities such as festivals.
ACTION: Early season heat is a sneaky hazard for those not acclimated to the heat. It's important to stay hydrated, seek shaded areas whenever possible, and apply sunscreen frequently!
By next week we will have to turn our attention to what comes of the progression of the trough over the western CONUS as pushes east into the central CONUS by midweek. That is likely when our next substantive rain chances will be.
AVIATION
(18Z TAFS)
Issued at 1234 PM CDT Wed Apr 23 2025
Convective activity will be displaced toward BTR and MCB this afternoon as a weak boundary continues to slowly shift further inland. PROB30 wording for the thunderstorm threat is included generally between 18z and 02z at these terminals with prevailing MVFR restrictions. After 02z, the loss of daytime heating should allow the convection to dissipate and a brief period of prevailing VFR conditions will take hold. However, the development of another inversion that will gradually strengthen through the night will allow for another round of low stratus to form between 07z and 12z. This will lead to a mix of IFR and MVFR ceilings ranging from 500 to 1500 feet at all of the terminals. MCB and BTR are expected to see the lowest ceilings and some fog will also form, especially at MCB, between 10z and 14z. After 14z, increased mixing of the boundary layer will allow the inversion to lift and prevailing MVFR and VFR conditions to take hold at all of the terminals by 16z. PG
MARINE
Issued at 328 PM CDT Wed Apr 23 2025
Though a few thunderstorms over the protected waters cannot be ruled out through Thursday, favorable conditions for maritime operations are expected otherwise. Onshore flow is likely to continue through the period with wind speeds for the most part remaining near 10 knots or less.
PRELIMINARY POINT TEMPS/POPS
MCB 65 84 66 85 / 50 40 10 30 BTR 67 86 68 86 / 40 40 0 30 ASD 67 84 67 85 / 10 20 0 10 MSY 70 84 70 85 / 10 20 0 10 GPT 68 81 68 82 / 10 10 0 10 PQL 65 83 65 84 / 10 10 0 10
LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.
Area Forecast Discussion National Weather Service New Orleans LA 355 PM CDT Wed Apr 23 2025
New SHORT TERM, LONG TERM, AVIATION, MARINE
SHORT TERM
(This evening through Thursday night)
Issued at 328 PM CDT Wed Apr 23 2025
The weak shortwave parade continues across the northern Gulf Coast which is aiding in some pop-up showers and storms. One or two of these have gotten tall enough with aid from boundary interactions to produce some stronger downdrafts and small hail, but overall these storms have been just producing brief downpours. Expect the cold pooling and lake breeze interactions to continue to produce more of these pop-ups moving westward through Baton Rouge metro over the next couple hours.
Rain chances fall rapidly overnight as daytime heating and associated atmospheric instability diminishes. Ample moisture in the low-levels and saturated soils will enable more patchy fog development tonight with highest probabilities across the Florida Parishes and Southwest MS, particularly between Baton Rouge and McComb. Dense fog probabilities remain below 30% and though a brief period of patchy dense fog cannot be ruled out near sunrise, confidence is medium that conditions will not warrant any dense fog products for this forecast cycle.
Expect more of the same tomorrow with warm, moist air entrenched over the area and pop-up showers and storms predominantly north of the I-10/12 corridor. However, coverage should be relatively more isolated than the days prior. Similar conditions Thursday night could lead to patchy fog development again into the early morning hours on Friday for northern areas, especially the river basins and areas north of I-10/12.
LONG TERM
(Friday through Tuesday night)
Issued at 328 PM CDT Wed Apr 23 2025
The longwave pattern gradually amplifies from the more zonal structure currently present across CONUS as a trough digs across the western CONUS and amplifies the ridging over the central CONUS. Rising mid-upper heights and temperatures will taper off rain chances for most of the area with warm, moist conditions settling in for the foreseeable future
Lows will be in the mid 60s to low 70s each night and highs will be gradually trend from the mid 80s to near 90F by Sunday. This is largely a product of warming mid-level temps and decreasing cloud cover. As a result, risk of sun exposure and heat-related illnesses will increase into the weekend especially for those seeking outdoor activities such as festivals.
ACTION: Early season heat is a sneaky hazard for those not acclimated to the heat. It's important to stay hydrated, seek shaded areas whenever possible, and apply sunscreen frequently!
By next week we will have to turn our attention to what comes of the progression of the trough over the western CONUS as pushes east into the central CONUS by midweek. That is likely when our next substantive rain chances will be.
AVIATION
(18Z TAFS)
Issued at 1234 PM CDT Wed Apr 23 2025
Convective activity will be displaced toward BTR and MCB this afternoon as a weak boundary continues to slowly shift further inland. PROB30 wording for the thunderstorm threat is included generally between 18z and 02z at these terminals with prevailing MVFR restrictions. After 02z, the loss of daytime heating should allow the convection to dissipate and a brief period of prevailing VFR conditions will take hold. However, the development of another inversion that will gradually strengthen through the night will allow for another round of low stratus to form between 07z and 12z. This will lead to a mix of IFR and MVFR ceilings ranging from 500 to 1500 feet at all of the terminals. MCB and BTR are expected to see the lowest ceilings and some fog will also form, especially at MCB, between 10z and 14z. After 14z, increased mixing of the boundary layer will allow the inversion to lift and prevailing MVFR and VFR conditions to take hold at all of the terminals by 16z. PG
MARINE
Issued at 328 PM CDT Wed Apr 23 2025
Though a few thunderstorms over the protected waters cannot be ruled out through Thursday, favorable conditions for maritime operations are expected otherwise. Onshore flow is likely to continue through the period with wind speeds for the most part remaining near 10 knots or less.
PRELIMINARY POINT TEMPS/POPS
MCB 65 84 66 85 / 50 40 10 30 BTR 67 86 68 86 / 40 40 0 30 ASD 67 84 67 85 / 10 20 0 10 MSY 70 84 70 85 / 10 20 0 10 GPT 68 81 68 82 / 10 10 0 10 PQL 65 83 65 84 / 10 10 0 10
LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
PTFL1 | 22 mi | 60 min | 75°F | 30.04 | ||||
GISL1 - 8761724 - Grand Isle, LA | 31 mi | 60 min | ESE 6G | 75°F | 79°F | 30.05 | ||
BYGL1 - 8762482 - Bayou Gauche, LA | 35 mi | 60 min | 76°F | 79°F | 30.05 | |||
LOPL1 - Louisiana Offshore Oil Port, LA | 39 mi | 82 min | SE 15 | 75°F | 3 ft | 30.04 | 72°F | |
AMRL1 - 8764227 - Amerada Pass, LA | 44 mi | 60 min | ESE 2.9G | 75°F | 72°F | 30.00 | ||
EINL1 | 45 mi | 60 min | ESE 12G | 75°F | 69°F | 30.02 | 73°F | |
TESL1 - Tesoro Marine Terminal - 8764044 - Berwick, LA | 45 mi | 60 min | SSE 4.1G | 75°F | 69°F | 30.00 | ||
CARL1 | 49 mi | 60 min | 67°F |
Wind History for Grand Isle, LA
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Airport Reports
Link to 1 hour of 5 minute data for KGAO
Terminal Aerodrome Forecast (TAF) for KGAO
Wind History Graph: GAO
(wind in knots)GEOS Local Image of Southern Mississippi Valley
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New Orleans/Baton Rouge, LA,

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