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Marine Weather and Tide Forecast for Port Sulphur, LA

April 24, 2025 6:40 PM CDT (23:40 UTC)
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Sunrise 6:21 AM   Sunset 7:34 PM
Moonrise 4:14 AM   Moonset 4:17 PM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
GMZ538 Expires:202504250915;;389174 Fzus54 Klix 242049 Cwflix
coastal waters forecast national weather service new orleans la 349 pm cdt Thu apr 24 2025
pascagoula to atchafalaya river out to 60 nm
seas are provided as a range of the average height of the highest 1/3 of the waves - .along with the occasional height of the average highest 10 percent of the waves.
gmz536-538-250915- chandeleur sound-breton sound- 349 pm cdt Thu apr 24 2025

Tonight - Southeast winds 10 to 15 knots. Waves 2 to 3 feet.

Friday - Southeast winds around 10 knots. Waves around 2 feet.

Friday night - South winds 5 to 10 knots. Waves around 2 feet in the evening, then 1 foot or less.

Saturday - Northeast winds around 5 knots, becoming southeast in the afternoon. Waves 1 foot or less, then around 2 feet in the afternoon.

Saturday night - South winds 5 to 10 knots, becoming southwest after midnight. Waves around 2 feet in the evening, then 1 foot or less.

Sunday - Northwest winds around 5 knots, becoming south in the afternoon. Waves 1 foot or less, then around 2 feet in the afternoon.

Sunday night - South winds 5 to 10 knots. Waves around 2 feet in the evening, then 1 foot or less.

Monday - Southeast winds 5 to 10 knots. Waves 1 foot or less, then around 2 feet in the afternoon.

Monday night - South winds around 10 knots. Waves around 2 feet.

Tuesday - Southeast winds 10 to 15 knots. Waves around 2 feet.

Tuesday night - South winds 10 to 15 knots. Waves 2 to 3 feet.
GMZ500 349 Pm Cdt Thu Apr 24 2025

Synopsis for pascagoula to atchafalaya river out 60 nm -
light onshore flow of around 10 knots will be the rule into early next week as high pressure remains centered near the waters.

7 Day Forecast for Marine Location Near Port Sulphur, LA
   
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Tide / Current for Gardner Island, Breton Sound, Louisiana
  
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Gardner Island
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Thu -- 04:13 AM CDT     Moonrise
Thu -- 05:57 AM CDT     0.40 feet Low Tide
Thu -- 06:21 AM CDT     Sunrise
Thu -- 12:11 PM CDT     0.64 feet High Tide
Thu -- 04:15 PM CDT     Moonset
Thu -- 04:59 PM CDT     0.59 feet Low Tide
Thu -- 07:30 PM CDT     Sunset
Thu -- 11:20 PM CDT     0.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Gardner Island, Breton Sound, Louisiana does not exist in database. Press Edit above and select a valid nearby location.

Gardner Island, Breton Sound, Louisiana, Tide feet
12
am
0.8
1
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0.7
2
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0.6
3
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0.5
4
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0.5
5
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0.4
6
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0.4
7
am
0.4
8
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0.5
9
am
0.5
10
am
0.6
11
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0.6
12
pm
0.6
1
pm
0.6
2
pm
0.6
3
pm
0.6
4
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0.6
5
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0.6
6
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0.6
7
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0.6
8
pm
0.7
9
pm
0.7
10
pm
0.7
11
pm
0.8

Tide / Current for Shell Beach, Lake Borgne, Louisiana
  
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Shell Beach
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Thu -- 04:15 AM CDT     Moonrise
Thu -- 06:22 AM CDT     Sunrise
Thu -- 09:50 AM CDT     0.35 feet Low Tide
Thu -- 03:52 PM CDT     0.56 feet High Tide
Thu -- 04:16 PM CDT     Moonset
Thu -- 07:31 PM CDT     Sunset
Thu -- 08:52 PM CDT     0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Shell Beach, Lake Borgne, Louisiana does not exist in database. Press Edit above and select a valid nearby location.

Shell Beach, Lake Borgne, Louisiana, Tide feet
12
am
0.9
1
am
0.9
2
am
0.8
3
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0.8
4
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0.7
5
am
0.6
6
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0.5
7
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0.4
8
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0.4
9
am
0.4
10
am
0.3
11
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0.4
12
pm
0.4
1
pm
0.5
2
pm
0.5
3
pm
0.5
4
pm
0.6
5
pm
0.6
6
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0.5
7
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0.5
8
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0.5
9
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0.5
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0.5
11
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0.6

Area Discussion for New Orleans/Baton Rouge, LA
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NOTE: mouseover dotted underlined text for definition
FXUS64 KLIX 242041 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 341 PM CDT Thu Apr 24 2025

New SHORT TERM, LONG TERM, AVIATION, MARINE

SHORT TERM
(This evening through Saturday night)
Issued at 314 PM CDT Thu Apr 24 2025

Another weak upper level shortwave trough will move through the Lower Mississippi Valley late tonight into tomorrow, and this feature should provide just enough forcing to allow for another round of shower and thunderstorm activity tomorrow. Initially, a weakening MCS will be moving into the northern portion of the CWA tomorrow morning. This weakening system will produce an outflow boundary that should serve as a focusing mechanism for additional convective activity along the I-12 corridor, especially for areas around Baton Rouge and Hammond. PWATS will be slightly lower tomorrow, but will still be in the 75th percentile range. This will support a continued heavy rainfall threat has storm motion remains low tomorrow. The highest PoP values will be along and north of the 10/12 corridor tomorrow afternoon. The convective activity should start to wane very quickly in the evening hours as the shortwave trough departs to the east and increasing heights aloft associated with a building ridge axis start to influence the region.

As the ridge continues to build into the region over the weekend, increasing deep layer subsidence will warm and dry out the atmosphere substantially. PWATS will fall to around the 25th percentile for this time of year and this will greatly inhibit cloud development overall rain chances. At most, an isolated shower or storm may develop over parts of southwest Mississippi as another weak shortwave passes through the mid-Mississippi Valley allowing for just enough lift to overcome the strong capping inversion. Otherwise, mostly sunny skies and warmer temperatures are anticipated for Saturday. Highs will easily climb into the mid to upper 80s and heat index values will rise into the lower 90s. Overnight lows will only cool into the upper 60s and lower 70s as persistent low level onshore flow keeps pumping Gulf moisture into the region.

LONG TERM
(Sunday through Wednesday night)
Issued at 314 PM CDT Thu Apr 24 2025

Sunday through Tuesday will be very warm and dry as the deep layer ridge axis remains firmly entrenched across the central Gulf coast. PWATS will remain in the 25th percentile range and temperatures will easily climb into the upper 80s over much of the area. Dewpoints will also remain elevated in the lower 70s and this will support heat index values in the low to mid 90s. The warmest readings will be over inland areas and away from the moderating seabreeze. Overall, conditions will feel more akin to those seen in late May or early June as opposed to late April.

A pattern change in the upper levels will take hold on Wednesday as the ridge axis begins to shift to the east and a vigorous southern stream trough moves into Texas. Although ridging will begin to decrease and PWATS will climb back to the median for this time of year, a strong mid-level capping inversion will remain in place. This is due to continued influence from the departing ridge keeping dry air in place in the mid-levels. At most, isolated and diurnally forced convection could develop over the far northwest part of the forecast area where slightly lower heights and a weaker capping inversion are expected to be in place. Otherwise, warm and dry conditions will persist as highs climb back into the mid to upper 80s and heat indices rise back into the lower 90s.

AVIATION
(18Z TAFS)
Issued at 314 PM CDT Thu Apr 24 2025

Scattered convective activity will be the primary concern through 00z, but the risk of convective impacts is too low to include at most of the terminals. BTR is the outlier as a line of showers and weak thunderstorms is in close proximity to the airport currently.
This line of convection will gradually move further east of the airport and have VCTS wording ending at 19z. Otherwise, a mix of MVFR and VFR ceilings ranging from 1500 to 3500 feet will be in place at the terminals. Tonight, a weak inversion will allow for some fog and low stratus to form over the more inland terminals with IFR conditions forecast for BTR and MCB between 10z and 14z.
MVFR ceilings will be in place at the remainder of the terminals as boundary layer conditions remains more mixed closer to the coast. After 14z, rapid improvement in conditions is expected as the inversion breaks amid warming surface temperatures.

MARINE
Issued at 314 PM CDT Thu Apr 24 2025

No significant impacts to maritime activities are expected through early next week. High pressure will be centered directly over or just to the east of the waters through the period, and this will result in light winds of around 10 knots and seas of 1 to 3 feet on average.

PRELIMINARY POINT TEMPS/POPS
MCB 68 84 66 86 / 20 50 30 20 BTR 69 85 67 86 / 20 40 30 10 ASD 69 84 68 86 / 10 30 20 10 MSY 72 84 71 85 / 10 20 20 10 GPT 71 81 69 82 / 10 10 10 10 PQL 69 81 69 84 / 10 10 0 10

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


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
SHBL1 - 8761305 - Shell Beach, LA 19 mi53 minSE 14G16 77°F 71°F30.04
GISL1 - 8761724 - Grand Isle, LA 29 mi53 minSE 9.9G14 78°F 78°F30.04
PILL1 35 mi53 minSSE 11G16 76°F 67°F30.04
CARL1 36 mi53 min 67°F
NWCL1 - 8761927 - New Canal, LA 39 mi53 minSSE 5.1G11 80°F 30.02
BYGL1 - 8762482 - Bayou Gauche, LA 44 mi53 min 80°F 79°F30.01
PTFL1 45 mi53 min 77°F 30.03
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 48 mi53 minESE 13G18 67°F30.03
BURL1 - Southwest Pass, LA 49 mi41 minESE 16G18 76°F 30.0473°F


Wind History for Shell Beach, LA
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg

Weather Map
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GEOS Local Image of Southern Mississippi Valley  
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New Orleans/Baton Rouge, LA,





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