FZUS54 KLCH 200810 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 310 AM CDT Wed May 20 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. GMZ400-202100- 310 AM CDT Wed May 20 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... Surface high pressure across the northern Gulf with a stalled frontal boundary to the north. This will allow for a persistent light to moderate southeast flow and light to modest seas through the week. Chances for showers and thunderstorms will also continue through the week and remain high into the weekend as a series of upper level disturbances produce several waves of precipitation. $$ GMZ430-202100- Sabine Lake- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms this morning, then showers and thunderstorms likely this afternoon. .TONIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .THURSDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .FRIDAY...South winds 5 to 10 knots. Lake waters light chop. Showers with a chance of thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .SUNDAY...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ432-202100- Calcasieu Lake- 310 AM CDT Wed May 20 2026 .TODAY...South winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms. .TONIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .THURSDAY...Southeast winds 5 to 10 knots, becoming south in the afternoon. Lake waters light chop. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .THURSDAY NIGHT...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. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. Showers likely. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .SUNDAY...South winds around 10 knots. Lake waters light chop. Showers. A chance of thunderstorms inthe morning, then thunderstorms likely in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely. Winds and waves higher in and near thunderstorms. $$ GMZ435-202100- Vermilion and West Cote Blanche Bays- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south late. Bay waters light chop. A chance of showers and thunderstorms. .TONIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers. A chance of thunderstorms, mainly in the evening. .THURSDAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...South winds around 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...South winds around 10 knots. Bay waters light chop. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SATURDAY...South winds 5 to 10 knots. Bay waters light chop. Showers likely. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. .SATURDAY NIGHT...Southeast winds around 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...South winds 10 to 15 knots. Bay waters choppy. Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers. Winds and waves higher in and near thunderstorms. $$ GMZ436-202100- Atchafalaya and East Cote Blanche Bays- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers with a slight chance of thunderstorms early this morning. A chance of showers and thunderstorms this afternoon. .TONIGHT...Southeast winds around 5 knots. Bay waters smooth. A chance of showers. A chance of thunderstorms, mainly in the evening. .THURSDAY...South winds 5 to 10 knots. Bay waters light chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...South 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. .FRIDAY...South winds around 10 knots. Bay waters light chop. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .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 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 likely. 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. Winds and waves higher in and near thunderstorms. $$ GMZ450-202100- Coastal waters from Cameron LA to High Island TX out 20 NM- 310 AM CDT Wed May 20 2026 .TODAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A chance of showers and thunderstorms. .TONIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers and thunderstorms. .SATURDAY...Southeast winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers. .SUNDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers likely. Winds and seas higher in and near thunderstorms. $$ GMZ452-202100- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 7 seconds. A chance of showers. A slight chance of thunderstorms this morning, then a chance of thunderstorms this afternoon. .TONIGHT...Southeast winds 5 to 10 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. .THURSDAY...Southeast winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...South 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 morning, then showers likely in the afternoon. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers and thunderstorms. .SATURDAY...South winds around 10 knots. Seas around 2 feet. 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 2 to 3 feet. A chance of thunderstorms. Showers likely. .SUNDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers. Winds and seas higher in and near thunderstorms. $$ GMZ455-202100- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds and southeast 1 foot at 3 seconds. A slight chance of thunderstorms this morning. A chance of showers. A chance of thunderstorms this afternoon. .TONIGHT...Southeast winds 5 to 10 knots. Seas 1 to 2 feet in the evening, then 1 foot or less. Wave Detail: Southeast 1 foot at 2 seconds. A chance ofshowers. A chance of thunderstorms, mainly in the evening. .THURSDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 2 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 3 seconds. A chance of showers and thunderstorms. .FRIDAY...South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 3 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of showers and thunderstorms, mainly in the evening. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...South winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. Showers. Winds and seas higher in and near thunderstorms. $$ GMZ470-202100- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds 5 to 10 knots, becoming south this afternoon. Seas 2 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of thunderstorms. A chance of showers early this morning, then a slight chance of showers late this morning and afternoon. .TONIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms after midnight. .THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 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. Showers likely with a chance of thunderstorms. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening. .SATURDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers. .SUNDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Showers with a chance of thunderstorms. .SUNDAY NIGHT...Southeast winds around 10 knots. Seas around 3 feet. A chance of thunderstorms. Showers likely. Winds and seas higher in and near thunderstorms. $$ GMZ472-202100- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds around 10 knots. Seas 2 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms this morning. A chance of thunderstorms with a slight chance of showers this afternoon. .TONIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening. .SATURDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers likely. .SUNDAY...South winds 10 to 15 knots. Seas around 3 feet. A chance of thunderstorms. Showers. .SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of thunderstorms. Showers. Winds and seas higher in and near thunderstorms. $$ GMZ475-202100- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 310 AM CDT Wed May 20 2026 .TODAY...Southeast winds around 10 knots. Seas 2 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms this morning. A chance of showers and thunderstorms this afternoon. .TONIGHT...Southeast 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. .THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY 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. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. .FRIDAY 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. .SATURDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers. A chance of thunderstorms, mainly in the evening. .SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Showers likely with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$