Coastal Waters Forecast
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
729 FZUS54 KLCH 210809 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 309 AM CDT Thu May 21 2026 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. GMZ400-212100- 309 AM CDT Thu May 21 2026 .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 light to modest southeast to south flow around 5-15 kts and seas around 1-4 feet will persist through the end of the week and into the weekend. Chances for showers and thunderstorms will remain high through the weekend as well, as a stalled frontal boundary and a series of upper level disturbances produce several waves of precipitation. $$ GMZ430-212100- Sabine Lake- 309 AM CDT Thu May 21 2026 .TODAY...East winds around 5 knots, becoming south this afternoon. Lake waters light chop. Showers likely with a chance of thunderstorms. .TONIGHT...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely, mainly in the morning. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms in the evening, then showers with thunderstorms likely after midnight. .SUNDAY...South winds 5 to 10 knots. Lake waters light chop. Showers with thunderstorms likely. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .MONDAY...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ432-212100- Calcasieu Lake- 309 AM CDT Thu May 21 2026 .TODAY...East winds 5 to 10 knots, becoming south this afternoon. Lake waters light chop. A chance of showers this morning. A chance of thunderstorms. Showers likely this afternoon. .TONIGHT...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .FRIDAY...South winds around 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely, mainly in the morning. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms after midnight. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms in the evening, then showers with thunderstorms likely after midnight. .SUNDAY...South winds 5 to 10 knots. Lake waters light chop. Showers. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .MONDAY...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-212100- Vermilion and West Cote Blanche Bays- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south this afternoon. Bay waters light chop. A chance of showers. A slight chance of thunderstorms early this morning, then a chance of thunderstorms late this morning and afternoon. .TONIGHT...South winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .FRIDAY...South winds 10 to 15 knots. Bay waters choppy. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms. .SATURDAY...South winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers likely, mainly in the morning. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...South winds 5 to 10 knots. Bay waters light chop. Showers. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers. .MONDAY...South winds 5 to 10 knots. Bay waters light chop. Showers with a chance of thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ436-212100- Atchafalaya and East Cote Blanche Bays- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south late. Bay waters light chop. A chance of showers and thunderstorms. .TONIGHT...South winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms. .SATURDAY...South winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SUNDAY...South winds 5 to 10 knots. Bay waters light chop. Showers with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers. .MONDAY...South winds 5 to 10 knots. Bay waters light chop. Showers with a chance of thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ450-212100- Coastal waters from Cameron LA to High Island TX out 20 NM- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south this afternoon. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of thunderstorms. .TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of thunderstorms. Showers likely, mainly in the morning. .FRIDAY NIGHT...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. A chance of showers and thunderstorms in the evening, then showers with thunderstorms likely after midnight. .SUNDAY...South winds 10 to 15 knots. Seas around 2 feet. Showers. Thunderstorms likely, mainly in the morning. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .MONDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers likely, mainly in the morning. .MONDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ452-212100- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south late. Seas around 2 feet. Wave Detail: South 2 feet at 3 seconds and southeast 2 feet at 6 seconds. A chance of showers and thunderstorms. .TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .SATURDAY...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .MONDAY...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .MONDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ455-212100- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet this afternoon. Wave Detail: South 1 foot at 2 seconds, becoming south 1 foot at 3 seconds. A chance of showers and thunderstorms. .TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 3 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 3 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 1 foot at 4 seconds. A slight chance of showers and thunderstorms. .SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 1 foot at 3 seconds. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .SUNDAY...South winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .MONDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ470-212100- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 309 AM CDT Thu May 21 2026 .TODAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A chance of thunderstorms. .TONIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. A chance of showers. A chance of thunderstorms, mainly in the morning. .FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .SATURDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. .SUNDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers. Thunderstorms likely, mainly in the morning. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. .MONDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers likely, mainly in the morning. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. 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. $$ GMZ472-212100- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 309 AM CDT Thu May 21 2026 .TODAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight chance of showers and thunderstorms early this morning, then a chance of showers and thunderstorms late this morning and afternoon. .TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds. A chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .SATURDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers. .MONDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers, mainly in the morning. .MONDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ475-212100- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 309 AM CDT Thu May 21 2026 .TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers and thunderstorms. .TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SUNDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers. .SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of thunderstorms. Showers. .MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of thunderstorms. Showers. .MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. Winds and seas higher in and near thunderstorms. $$