NWS Marine Forecast


   GMZ550-552-190615-  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-  1243 PM CDT Fri Jul 18 2025    THIS AFTERNOON  Southwest winds around 10 knots. Seas around  2 feet. Wave Detail: Southwest 2 feet at 4 seconds and southeast  1 foot at 5 seconds. A chance of showers and thunderstorms early,  then a slight chance of showers and thunderstorms late.  TONIGHT  South winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail:  South 2 feet at 5 seconds. A slight chance of showers and  thunderstorms in the evening, then a chance of showers and  thunderstorms after midnight.  SATURDAY  South winds 5 to 10 knots. Seas 1 to 2 feet in the  morning, then 1 foot or less. Wave Detail: South 1 foot at  5 seconds, becoming south 1 foot at 4 seconds. A chance of showers.  Thunderstorms likely, mainly in the morning.  SATURDAY NIGHT  South winds around 5 knots. Seas 1 foot or less.  Wave Detail: South 1 foot at 5 seconds. A slight chance of showers  and thunderstorms after midnight.  SUNDAY  South winds around 5 knots. Seas 1 to 2 feet. Wave Detail:  Southeast 2 feet at 6 seconds. A chance of showers and  thunderstorms.  SUNDAY NIGHT  South winds around 5 knots. Seas 1 to 2 feet. Wave  Detail: Southeast 2 feet at 6 seconds. A slight chance of showers  and thunderstorms after midnight.  MONDAY  Southwest winds around 5 knots. Seas 1 to 2 feet. Wave  Detail: Southeast 2 feet at 6 seconds. A chance of showers and  thunderstorms, mainly in the morning.  MONDAY NIGHT  Southwest winds around 5 knots. Seas 1 to 2 feet.  Wave Detail: Southeast 2 feet at 6 seconds and southwest 1 foot at  3 seconds. A slight chance of showers and thunderstorms after  midnight.  TUESDAY  West winds around 5 knots. Seas 1 to 2 feet in the  morning, then 1 foot or less. Wave Detail: South 1 foot at  5 seconds. A chance of showers and thunderstorms, mainly in the  morning.  TUESDAY NIGHT  West winds around 5 knots. Seas 1 foot or less.  Wave Detail: South 1 foot at 5 seconds. A chance of showers and  thunderstorms after midnight.    Winds and seas higher in and near thunderstorms.    $$