Coastal Waters Forecast
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
506 FZUS54 KLCH 210528 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 1228 AM 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. GMZ400-211800- 1228 AM 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. $$ GMZ430-211800- Sabine Lake- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds around 5 knots, becoming west around 5 knots late. Lake waters smooth. A chance of showers and thunderstorms this morning, then showers and thunderstorms likely this afternoon. .TONIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms. .FRIDAY...Northeast winds around 5 knots. Lake waters smooth. Showers likely. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .FRIDAY NIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms. .SATURDAY...North winds around 5 knots, becoming east in the afternoon. Lake waters smooth. A chance of showers and thunderstorms. .SATURDAY NIGHT...South winds around 5 knots, becoming west around 5 knots after midnight. Lake waters smooth. A slight chance of thunderstorms in the evening. A slight chance of showers. .SUNDAY...North winds around 5 knots, becoming east around 5 knots in the afternoon. Lake waters smooth. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .SUNDAY NIGHT...South winds around 5 knots, becoming west after midnight. Lake waters smooth. .MONDAY...Northwest winds around 5 knots, becoming southeast in the afternoon. Lake waters smooth. A slight chance of showers and thunderstorms. .MONDAY NIGHT...South winds around 5 knots. Lake waters smooth. A slight chance of showers after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ432-211800- Calcasieu Lake- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms this morning, then showers and thunderstorms likely this afternoon. .TONIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms. .FRIDAY...Northeast winds around 5 knots. Lake waters smooth. Showers and thunderstorms likely. .FRIDAY NIGHT...Northeast winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms. .SATURDAY...North winds around 5 knots, becoming east in the afternoon. Lake waters smooth. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southwest winds around 5 knots, becoming west 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. .SUNDAY...Northwest winds around 5 knots. Lake waters smooth. A slight chance of thunderstorms. A chance of showers, mainly in the morning. .SUNDAY NIGHT...Southwest winds around 5 knots. Lake waters smooth. .MONDAY...Northwest winds around 5 knots, becoming south 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 after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-211800- Vermilion and West Cote Blanche Bays- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds around 5 knots, becoming west around 5 knots this afternoon. Bay waters smooth. A slight chance of showers and thunderstorms this morning, then a chance of showers and thunderstorms early this afternoon. Showers and thunderstorms likely late. .TONIGHT...Northeast winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms. .FRIDAY...North winds around 5 knots. Bay waters smooth. Showers and thunderstorms. .FRIDAY NIGHT...Northeast winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms. .SATURDAY...Northwest winds around 5 knots. Bay waters smooth. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southwest winds around 5 knots. Bay waters smooth. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SUNDAY...Northwest winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...West winds around 5 knots. Bay waters smooth. A slight chance of showers. .MONDAY...Northwest winds around 5 knots, becoming southwest in the afternoon. Bay waters smooth. A slight chance of showers and thunderstorms. .MONDAY NIGHT...Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ436-211800- Atchafalaya and East Cote Blanche Bays- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds around 5 knots, becoming west around 5 knots this afternoon. Bay waters smooth. A slight chance of showers and thunderstorms this morning. A chance of showers and thunderstorms early this afternoon, then showers and thunderstorms likely late. .TONIGHT...Northeast winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms. .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, becoming southwest after midnight. Bay waters smooth. A chance of showers and thunderstorms. .SATURDAY...Northwest winds around 5 knots. Bay waters smooth. Showers and thunderstorms likely, mainly in the morning. .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. Bay waters smooth. A chance of showers and thunderstorms. .SUNDAY NIGHT...West winds around 5 knots. Bay waters smooth. A slight chance of showers. A slight chance of thunderstorms after midnight. .MONDAY...Northwest winds around 5 knots, becoming west in the afternoon. Bay waters smooth. A chance of showers and thunderstorms. .MONDAY NIGHT...Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ450-211800- Coastal waters from Cameron LA to High Island TX out 20 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: North 1 foot at 2 seconds. A chance of showers. .TONIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or less. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 3 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...East winds around 5 knots. Seas 1 foot or less. Wave Detail: East 1 foot at 2 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at 2 seconds. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...South winds around 5 knots, becoming west after midnight. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 2 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SUNDAY...North winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms, mainly in the morning. .SUNDAY NIGHT...South winds 5 to 10 knots, becoming southwest after midnight. Seas 1 foot or less. A slight chance of showers after midnight. .MONDAY...Northwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas 1 foot or less. A slight chance of showers and thunderstorms. .MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ452-211800- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...North winds 5 to 10 knots, becoming northwest late. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of showers and thunderstorms this morning, then showers and thunderstorms likely early this afternoon. A chance of showers and thunderstorms late. .TONIGHT...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. .FRIDAY...Northeast winds 5 to 10 knots, becoming northwest in the afternoon. Seas 1 foot or less. Thunderstorms likely. Showers. .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...Northwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 2 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SUNDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. A chance of showers and thunderstorms, mainly in the morning. .SUNDAY NIGHT...Southwest 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. .MONDAY...Northwest winds 5 to 10 knots, becoming southwest 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. Winds and seas higher in and near thunderstorms. $$ GMZ455-211800- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...Northwest winds around 5 knots, becoming west late. Seas 1 foot or less. A chance of showers and thunderstorms. .TONIGHT...Northeast winds around 5 knots. Seas 1 foot or less. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...North winds around 5 knots, becoming northwest in the afternoon. Seas 1 foot or less. Thunderstorms likely. Showers. .FRIDAY NIGHT...North winds around 5 knots, becoming southwest around 5 knots after midnight. Seas 1 foot or less. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...Northwest winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. Showers and thunderstorms likely, mainly in the morning. .SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. A chance of showers and thunderstorms. .SUNDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...Northwest winds 5 to 10 knots, becoming west in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms, mainly in the morning. .MONDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ470-211800- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly this morning. .TONIGHT...North winds around 5 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. .FRIDAY...North winds around 5 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...East winds around 5 knots, becoming south after midnight. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 3 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SATURDAY...Northwest winds around 5 knots, becoming northeast in the afternoon. Seas 1 foot or less. Wave Detail: Northwest 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: Northeast 1 foot at 2 seconds and southwest 1 foot at 2 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SUNDAY...Northwest winds 5 to 10 knots, becoming northeast in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms, mainly in the morning. .SUNDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers after midnight. .MONDAY...Northwest winds 5 to 10 knots, becoming east in the afternoon. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. .MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ472-211800- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly this morning. .TONIGHT...North winds around 5 knots, becoming east after midnight. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 3 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...North winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...Northeast winds around 5 knots, becoming south after midnight. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SATURDAY...Northwest winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. 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: West 1 foot at 2 seconds and south 1 foot at 5 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. A chance of showers. A chance of thunderstorms, mainly in the morning. .SUNDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms after midnight. .MONDAY...West winds 5 to 10 knots. 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. Winds and seas higher in and near thunderstorms. $$ GMZ475-211800- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 1228 AM CDT Thu Aug 21 2025 .TODAY...Northwest winds around 5 knots. Seas 1 foot or less. Wave Detail: Northwest 1 foot at 2 seconds. A chance of thunderstorms. Showers likely early this morning, then a chance of showers late this morning and afternoon. .TONIGHT...North winds around 5 knots, becoming southeast 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. .FRIDAY...West winds around 5 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...North winds around 5 knots, becoming southwest after midnight. Seas 1 foot or less. Wave Detail: Southwest 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. .SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds. Showers with thunderstorms likely in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 2 seconds and south 1 foot at 5 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. A chance of thunderstorms. Showers 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...West winds 5 to 10 knots. Seas 1 foot or less. A chance of showers. A chance of thunderstorms, mainly in the morning. .MONDAY NIGHT...South 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. Winds and seas higher in and near thunderstorms. $$