Marine Weather Net

Lower Atchafalaya River to Intracoastal City, LA Marine Forecast


TODAY

NE
WINDS
15 - 20
KNOTS

TONIGHT

NE
WINDS
20 - 25
KNOTS

FRIDAY

NE
WINDS
20 - 25
KNOTS

FRIDAY NIGHT

NE
WINDS
25 - 30
KNOTS

The Marine Weather Forecast In Detail:
GMZ455 Forecast Issued: 425 AM CDT Thu Oct 08 2026

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 7 AM CDT THIS MORNING ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT...
Today...Northeast Winds 15 To 20 Knots. Gusts Up To 30 Knots Late. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 3 Seconds.
Tonight...Northeast Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 2 To 4 Feet. Wave Detail: East 3 Feet At 4 Seconds. A Slight Chance Of Thunderstorms. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers After Midnight.
Friday...Northeast Winds 20 To 25 Knots, Increasing To 25 To 30 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 4 Feet At 4 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Friday Night...Northeast Winds 25 To 30 Knots, Diminishing To 20 To 25 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 4 Feet At 4 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers.
Saturday...North Winds 15 To 20 Knots With Gusts Up To 30 Knots, Becoming Northwest 10 To 15 Knots With Gusts Up To 20 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet, Subsiding To 2 To 3 Feet In The Afternoon. Wave Detail: Northeast 3 Feet At 3 Seconds, Becoming North 2 Feet At 3 Seconds. A Chance Of Showers In The Morning.
Saturday Night...North Winds 5 To 10 Knots. Seas Around 2 Feet In The Evening, Then 1 Foot Or Less. Wave Detail: North 2 Feet At 3 Seconds And East 1 Foot At 3 Seconds, Becoming Northwest 1 Foot At 3 Seconds.
Sunday...Northeast Winds Around 5 Knots. Seas 1 Foot Or Less.
Sunday Night...Southeast Winds Around 5 Knots. Seas 1 Foot Or Less.
Monday...East Winds 5 To 10 Knots. Seas 1 Foot Or Less.
Monday Night...Southeast Winds Around 5 Knots. Seas 1 Foot Or Less. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service Lake Charles LA
1135pm CDT Wednesday Oct 7 2026

(Tonight through next Wednesday) Issued at 1128pm CDT Wednesday Oct 7 2026

Calm and clear conditions will continue for Thursday and the first half of Friday as Tropical Storm Isaias approaches the eastern Gulf Coast. To our west, a trough is digging south into Texas and is providing a counterclockwise flow that is pushing Isaias north. To our east, ridging from the Bermuda High will block the system from moving farther east into Florida. For southwest Louisiana and southeast Texas, the forecast tracks keep us on the periphery of the system with most of the tropical impacts expected to stay east of our CWA.

By Friday, we will be feeling the influence from Isaias with a robust northeast flow. With the system to our east, Acadiana should expect higher winds and rain chances through the weekend as deep tropical moisture from the system moves into Florida. Farther west subsidence from the tropical cyclone will limit rain and cloud cover. Rain chances will stay elevated for the eastern half of the CWA (County Warning Area) through the weekend, but due to the fast-moving nature of the storm, flash flooding does not look like an issue for us. Winds over the weekend will be elevated, with sustained winds between 10 and 15 mph and gusts up to 20 mph.

Going into next week, high pressure will build behind Isaias, leading to mostly clear skies and calm weather.

Marine
Issued at 1128pm CDT Wednesday Oct 7 2026

Tropical Storm Isaias is located in the southern Gulf and is expected to move north-northeast over the next three days before making landfall somewhere along the eastern Gulf Coast. Despite not being in the direct path of this storm, we do expect gusty winds starting tonight, with a Small Craft Advisory in effect for outer coastal waters. The rest of the waters will be under a SCA by Thursday morning. As we move into Friday, a Gale Warning looks likely but is conditional on the path of Isaias.

Waves will steadily rise for the rest of the week, building to over 10 feet in the outer coastal waters. Near the shore, waves are forecasted to reach over 5 feet. Along the coast, coastal flood warnings or advisories are likely starting on Friday and lasting through the weekend.

Fire Weather
Issued at 1128pm CDT Wednesday Oct 7 2026

Ongoing dry conditions have pushed KBDI values to between 500 and 700 across the region, with the highest values in central Louisiana. As Tropical Storm Isaias moves onshore along the eastern Gulf Coast, our area will experience strong northeast winds that will push dry air into the region. Given the current dry conditions, the combination of low RH and high winds creates a concerning setup for dangerous fire weather conditions. Thursday and Friday minRH values will be in the 30s with winds between 10 and 20 knots.

NOAA Lake Charles LA Office: Watches - Warnings - Advisories
LA...None. TX...None. GM...Small Craft Advisory from 7am Thursday to 7am CDT Friday for GMZ450-452-455.

Small Craft Advisory until 7am CDT Friday for GMZ470-472-475.