Coastal Waters Forecast
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
181 FZUS54 KLCH 211802 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 102 PM CDT Thu Aug 21 2025 Coastal waters from the Lower Atchafalaya River LA to High Island TX out 60 nautical miles including Sabine and Calcasieu Lakes and Vermilion and Cote Blanche Bays Seas are provided as a range of the average height of the highest one third of the waves, along with the occasional height of the average highest ten percent of the waves. GMZ400-220700- 102 PM CDT Thu Aug 21 2025 .Synopsis for Lower Atchafalaya River LA to High Island TX out 60 NM including Sabine and Calcasieu Lakes and Vermilion and Cote Blanche Bays... A trough will move toward the coast from the north on Thursday stalling along the coast on Friday. This trough will help bring an increase in chances for showers and thunderstorms during any time of day through Friday. More typical scattered showers and thunderstorms, mainly late night and early morning, and again in the afternoon will be in the forecast over the weekend as troughing remains offshore. $$ GMZ430-220700- Sabine Lake- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northwest winds around 5 knots, becoming northeast late this evening and overnight. Lake waters smooth. A chance of thunderstorms. A chance of showers until early morning, then showers likely late. .FRIDAY...Northeast winds around 5 knots. Lake waters smooth. Thunderstorms likely. Showers. .FRIDAY NIGHT...Northeast winds around 5 knots. Lake waters smooth. Showers likely. Thunderstorms likely, mainly in the evening. .SATURDAY...Northeast winds around 5 knots. Lake waters smooth. A chance of thunderstorms. Showers likely, mainly in the morning. .SATURDAY NIGHT...South winds around 5 knots, becoming northwest after midnight. Lake waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...North winds around 5 knots, becoming east in the afternoon. Lake waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...South winds around 5 knots, becoming west around 5 knots after midnight. Lake waters smooth. A slight chance of showers after midnight. .MONDAY...North winds around 5 knots, becoming southeast in the afternoon. Lake waters smooth. A slight chance of showers and thunderstorms. .MONDAY NIGHT...South winds around 5 knots. Lake waters smooth. A slight chance of showers. A slight chance of thunderstorms after midnight. .TUESDAY...North winds around 5 knots, becoming southeast in the afternoon. Lake waters smooth. A chance of showers and thunderstorms. .TUESDAY NIGHT...Southeast winds around 5 knots, becoming east after midnight. Lake waters smooth. A chance of showers with a slight chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ432-220700- Calcasieu Lake- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of thunderstorms. A chance of showers until early morning, then showers likely late. .FRIDAY...Northeast winds around 5 knots. Lake waters smooth. Thunderstorms likely. Showers. .FRIDAY NIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...Northeast winds around 5 knots. Lake waters smooth. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southeast winds around 5 knots, becoming west after midnight. Lake waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...North winds around 5 knots, becoming east in the afternoon. Lake waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...South winds around 5 knots, becoming west after midnight. Lake waters smooth. A slight chance of showers after midnight. .MONDAY...North winds around 5 knots, becoming southeast in the afternoon. Lake waters smooth. A slight chance of showers and thunderstorms. .MONDAY NIGHT...South winds around 5 knots. Lake waters smooth. A slight chance of showers and thunderstorms. .TUESDAY...North winds around 5 knots, becoming southeast in the afternoon. Lake waters light chop. A chance of showers and thunderstorms. .TUESDAY NIGHT...South winds around 5 knots, becoming east after midnight. Lake waters smooth. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-220700- Vermilion and West Cote Blanche Bays- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots. Bay waters smooth. A chance of thunderstorms. A chance of showers. .FRIDAY...Northeast winds around 5 knots, becoming west around 5 knots in the afternoon. Bay waters smooth. Showers and thunderstorms. .FRIDAY NIGHT...Northeast winds around 5 knots. Bay waters smooth. Showers likely. Thunderstorms likely, mainly in the evening. .SATURDAY...North winds around 5 knots, becoming northwest in the afternoon. Bay waters smooth. Showers likely. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .SATURDAY NIGHT...West winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...North winds around 5 knots, becoming east in the afternoon. Bay waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...Southwest winds around 5 knots, becoming west after midnight. Bay waters smooth. A slight chance of showers. A slight chance of thunderstorms after midnight. .MONDAY...Northeast winds around 5 knots, becoming southeast in the afternoon. Bay waters smooth. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .MONDAY NIGHT...South winds around 5 knots, becoming west after midnight. Bay waters smooth. A slight chance of showers and thunderstorms. .TUESDAY...North winds around 5 knots, becoming south in the afternoon. Bay waters smooth. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .TUESDAY NIGHT...South winds around 5 knots, becoming northeast after midnight. Bay waters smooth. A slight chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ436-220700- Atchafalaya and East Cote Blanche Bays- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms this evening. A slight chance of showers and thunderstorms after midnight, then a chance of showers and thunderstorms late. .FRIDAY...Northeast winds around 5 knots, becoming west around 5 knots in the afternoon. Bay waters smooth. Showers and thunderstorms likely. .FRIDAY NIGHT...Northeast winds around 5 knots, becoming southeast after midnight. Bay waters smooth. Showers likely. Thunderstorms likely, mainly in the evening. .SATURDAY...Northwest winds around 5 knots, becoming west in the afternoon. Bay waters smooth. Showers and thunderstorms likely. .SATURDAY NIGHT...Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...Northwest winds around 5 knots, becoming southwest in the afternoon. Bay waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...North winds around 5 knots, becoming south in the afternoon. Bay waters smooth. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .MONDAY NIGHT...South winds around 5 knots, becoming west after midnight. Bay waters smooth. A slight chance of showers and thunderstorms. .TUESDAY...North winds around 5 knots, becoming west in the afternoon. Bay waters smooth. A chance of showers and thunderstorms. .TUESDAY NIGHT...South winds around 5 knots, becoming northeast after midnight. Bay waters smooth. A slight chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ450-220700- Coastal waters from Cameron LA to High Island TX out 20 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms until early morning, then showers and thunderstorms likely late. .FRIDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds. Showers and thunderstorms likely. .FRIDAY NIGHT...East winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms in the evening, then showers with thunderstorms likely after midnight. .SATURDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southeast winds around 5 knots, becoming southwest after midnight. Seas 1 foot or less. Wave Detail: East 1 foot at 2 seconds. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. .SUNDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of showers and thunderstorms, mainly in the morning. .SUNDAY NIGHT...South winds 5 to 10 knots, becoming southwest after midnight. Seas 1 foot or less. A slight chance of showers after midnight. .MONDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .TUESDAY...Northwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...Southeast winds around 10 knots. Seas 1 foot or less, then around 2 feet after midnight. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ452-220700- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...North winds around 5 knots, becoming northeast after midnight. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of showers and thunderstorms until early morning, then showers and thunderstorms likely late. .FRIDAY...Northeast winds around 5 knots. Seas 1 foot or less. Thunderstorms likely. Showers likely, mainly in the morning. .FRIDAY NIGHT...Northeast winds around 5 knots. Seas 1 foot or less. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...North winds around 5 knots. Seas 1 foot or less. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of showers and thunderstorms. .SUNDAY NIGHT...South winds 5 to 10 knots, becoming west after midnight. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .MONDAY NIGHT...South winds 5 to 10 knots, becoming southwest after midnight. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .TUESDAY...Northwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...South winds around 10 knots, becoming east after midnight. Seas 1 foot or less, then around 2 feet after midnight. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ455-220700- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms until early morning, then showers and thunderstorms likely late. .FRIDAY...Northeast winds around 5 knots, becoming west around 5 knots in the afternoon. Seas 1 foot or less. Showers and thunderstorms likely. .FRIDAY NIGHT...Northeast winds around 5 knots, becoming south after midnight. Seas 1 foot or less. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...West winds around 5 knots. Seas 1 foot or less. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 2 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...Northwest winds around 5 knots, becoming southwest in the afternoon. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. Showers and thunderstorms likely, mainly in the morning. .SUNDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...Northwest winds around 5 knots, becoming south in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. .MONDAY NIGHT...South winds around 5 knots, becoming southwest after midnight. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers and thunderstorms after midnight. .TUESDAY...Northwest winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...South winds around 5 knots, becoming east after midnight. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ470-220700- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northeast winds around 5 knots, becoming southeast after midnight, then becoming north late. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of thunderstorms. A chance of showers until early morning, then showers likely late. .FRIDAY...Northeast winds around 5 knots. Seas 1 foot or less. Wave Detail: North 1 foot at 2 seconds. Showers likely. Thunderstorms likely, mainly in the morning. .FRIDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. .SATURDAY...North winds around 5 knots, becoming northeast in the afternoon. Seas 1 foot or less. A chance of thunderstorms. Showers, mainly in the morning. .SATURDAY NIGHT...Southeast winds around 5 knots, becoming south after midnight. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds and south 1 foot at 2 seconds. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. .SUNDAY...Northwest winds around 5 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly in the morning. .SUNDAY NIGHT...South winds around 5 knots. Seas 1 foot or less. A chance of showers after midnight. .MONDAY...North winds around 5 knots, becoming east in the afternoon. Seas 1 foot or less. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .TUESDAY...West winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet in the morning, then 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...Southeast winds around 10 knots. Seas 1 foot or less, then around 2 feet after midnight. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ472-220700- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northwest winds around 5 knots, becoming northeast late this evening and overnight. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A slight chance of showers this evening. A chance of thunderstorms. A chance of showers after midnight. .FRIDAY...North winds around 5 knots. Seas 1 foot or less. Showers likely. Thunderstorms likely, mainly in the morning. .FRIDAY NIGHT...East winds around 5 knots, becoming south after midnight. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. .SATURDAY...West winds around 5 knots, becoming north in the afternoon. Seas 1 foot or less. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...South winds around 5 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 2 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SUNDAY...Northwest winds around 5 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds and southeast 1 foot at 4 seconds. Showers and thunderstorms likely, mainly in the morning. .SUNDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...Northwest winds around 5 knots, becoming northeast in the afternoon. Seas 1 foot or less. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers in the evening, then a chance of showers and thunderstorms after midnight. .TUESDAY...Northwest winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or less. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ475-220700- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 102 PM CDT Thu Aug 21 2025 .TONIGHT...Northwest winds around 5 knots, becoming northeast late this evening, then becoming south after midnight, becoming west late. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A slight chance of showers and thunderstorms this evening, then a chance of showers and thunderstorms after midnight. .FRIDAY...Northwest winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. Showers likely. Thunderstorms likely, mainly in the morning. .FRIDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 2 seconds. Showers with thunderstorms likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SUNDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds and south 1 foot at 5 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .SUNDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...West winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet in the afternoon. Showers likely with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. .MONDAY NIGHT...Southwest winds around 5 knots. Seas around 2 feet in the evening, then 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .TUESDAY...Northwest winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms. .TUESDAY NIGHT...South winds 5 to 10 knots, becoming east after midnight. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$