Coastal Waters Forecast
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
593 FZUS54 KLCH 202054 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 354 PM CDT Mon Jul 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. GMZ400-210915- 354 PM CDT Mon Jul 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... High pressure over the western Gulf will drive westerly winds around 10-15 knots today, with winds increasing from east to west starting tonight as Tropical Depression Two approaches the area. Look for winds to increase to the 20-25 kt range by Wednesday over our eastern waters. Tropical storm conditions will be possible at times Wednesday night through Friday as the system passes along the coastline. $$ GMZ430-210915- Sabine Lake- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...Southwest winds around 5 knots. Lake waters smooth. .TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop. .TUESDAY...West winds 5 to 10 knots. Lake waters light chop. .TUESDAY NIGHT...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY NIGHT...Southwest winds 5 to 10 knots, becoming northwest after midnight. Lake waters light chop. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .THURSDAY...Northeast winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...South winds 5 to 10 knots, becoming north 20 to 25 knots after midnight. Lake waters very rough. A slight chance of showers and thunderstorms. .FRIDAY...Northeast winds 15 to 20 knots, becoming east in the afternoon. Lake waters rough. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds 20 to 25 knots with gusts up to 30 knots, becoming southwest around 5 knots after midnight. Lake waters very rough. A slight chance of showers and thunderstorms early in the evening. Winds and waves higher in and near thunderstorms. $$ GMZ432-210915- Calcasieu Lake- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...Southwest winds 5 to 10 knots. Lake waters light chop. .TONIGHT...West winds 5 to 10 knots. Lake waters light chop. .TUESDAY...West winds 5 to 10 knots. Lake waters light chop. .TUESDAY NIGHT...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY NIGHT...West winds 5 to 10 knots, becoming north after midnight. Lake waters light chop. A chance of thunderstorms in the evening. A chance of showers. A slight chance of thunderstorms after midnight. .THURSDAY...Northeast winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Northwest winds 15 to 20 knots, becoming northeast 20 to 25 knots after midnight. Lake waters very rough. A slight chance of showers and thunderstorms. .FRIDAY...East winds 15 to 20 knots, becoming southeast 20 to 25 knots with gusts up to 30 knots in the afternoon. Lake waters very rough. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-210915- Vermilion and West Cote Blanche Bays- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...West winds 5 to 10 knots. Bay waters light chop. .TONIGHT...West winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Bay waters choppy. .TUESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A slight chance of showers and thunderstorms in the afternoon. .TUESDAY NIGHT...West winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Bay waters choppy. A chance of showers and thunderstorms in the evening. .WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots. Bay waters choppy. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Northwest winds 15 to 20 knots, becoming west 25 to 30 knots after midnight. Bay waters extremely rough. A chance of thunderstorms in the evening. A chance of showers. A slight chance of thunderstorms after midnight. .THURSDAY...North winds 20 to 25 knots, diminishing to 10 to 15 knots in the afternoon. Bay waters very rough. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 20 to 25 knots with gusts up to 30 knots. Bay waters very rough. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms after midnight. .FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ436-210915- Atchafalaya and East Cote Blanche Bays- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms. .TONIGHT...West winds 5 to 10 knots, becoming northwest 10 to 15 knots with gusts up to 20 knots after midnight. Bay waters choppy. A slight chance of showers and thunderstorms early in the evening. .TUESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .TUESDAY NIGHT...West winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Bay waters choppy. Thunderstorms likely with a chance of showers in the evening, then a slight chance of showers and thunderstorms after midnight. .WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots. Bay waters choppy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms early in the afternoon. Showers and thunderstorms likely late. .WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to 30 knots, increasing to 25 to 30 knots with gusts up to 40 knots after midnight. Bay waters extremely rough. Showers likely with a chance of thunderstorms. .THURSDAY...Northwest winds 15 to 20 knots, becoming southeast in the afternoon. Gusts up to 35 knots. Bay waters rough. A chance of showers and thunderstorms. .THURSDAY NIGHT...Southeast winds 20 to 25 knots, becoming south 15 to 20 knots after midnight. Bay waters very rough. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms after midnight. .FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ450-210915- Coastal waters from Cameron LA to High Island TX out 20 NM- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds. .TUESDAY...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds. .TUESDAY NIGHT...West winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds. .WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. .WEDNESDAY NIGHT...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds. A chance of showers. .THURSDAY...North winds 10 to 15 knots, becoming southwest in the afternoon. Gusts up to 25 knots. Seas 2 to 4 feet. A chance of showers and thunderstorms early in the morning, then a slight chance of showers and thunderstorms in the late morning and afternoon. .THURSDAY NIGHT...Southwest winds 10 to 15 knots, becoming northwest 20 to 25 knots after midnight. Seas 2 to 4 feet. A slight chance of showers and thunderstorms. .FRIDAY...North winds 15 to 20 knots, becoming southeast in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 15 to 20 knots with gusts up to 25 knots, becoming southwest 10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet after midnight. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms late. Winds and seas higher in and near thunderstorms. $$ GMZ452-210915- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 354 PM CDT Mon Jul 20 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .THIS AFTERNOON...West winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. .TUESDAY...West winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. A slight chance of showers and thunderstorms in the afternoon. .TUESDAY NIGHT...West winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms late in the evening. A slight chance of showers and thunderstorms late. .WEDNESDAY...West winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A slight chance of showers and thunderstorms early in the morning. A slight chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...West winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A chance of thunderstorms. .THURSDAY...Northwest winds 20 to 25 knots. Gusts up to 35 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. A chance of showers and thunderstorms early in the morning. A slight chance of showers and thunderstorms late in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Northwest winds 20 to 25 knots, becoming east 15 to 20 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms after midnight. .FRIDAY...South winds 15 to 20 knots. Seas 2 to 4 feet. A chance of showers and thunderstorms early in the morning, then a slight chance of showers and thunderstorms in the late morning and afternoon. .FRIDAY NIGHT...Southwest winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas around 2 feet. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ455-210915- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 354 PM CDT Mon Jul 20 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .THIS AFTERNOON...West winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: West 2 feet at 3 seconds. .TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: West 2 feet at 3 seconds. .TUESDAY...Northwest winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 3 seconds. A slight chance of showers and thunderstorms until late afternoon, then a chance of showers and thunderstorms late. .TUESDAY NIGHT...West winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight. A chance of showers and thunderstorms late. .WEDNESDAY...West winds 15 to 20 knots with gusts up to 30 knots. Seas 2 to 4 feet. Wave Detail: West 3 feet at 4 seconds. A chance of thunderstorms. A chance of showers. .WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to 30 knots, increasing to 25 to 30 knots with gusts up to 40 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 5 feet at 5 seconds. A chance of thunderstorms. Showers likely until early morning, then a chance of showers late. .THURSDAY...Northwest winds 25 to 30 knots, becoming west 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. A chance of showers and thunderstorms. .THURSDAY NIGHT...South winds 20 to 25 knots with gusts up to 35 knots. Seas 2 to 4 feet. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms after midnight. .FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ470-210915- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 354 PM CDT Mon Jul 20 2026 .THIS AFTERNOON...West winds 5 to 10 knots. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds. .TUESDAY...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. .TUESDAY NIGHT...West winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 4 feet. Wave Detail: Southwest 3 feet at 4 seconds. .WEDNESDAY...West winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A slight chance of showers and thunderstorms in the late morning and afternoon. .WEDNESDAY NIGHT...West winds 10 to 15 knots with gusts up to 25 knots. Seas around 3 feet. Wave Detail: Southwest 3 feet at 5 seconds. A chance of showers. A slight chance of thunderstorms until early morning, then a chance of thunderstorms late. .THURSDAY...West winds 10 to 15 knots, becoming southwest 5 to 10 knots in the afternoon. Gusts up to 25 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late. .THURSDAY NIGHT...Southwest winds around 10 knots, becoming west 15 to 20 knots after midnight. Gusts up to 30 knots. Seas 3 to 4 feet. A slight chance of showers and thunderstorms. .FRIDAY...Southwest winds 10 to 15 knots with gusts up to 30 knots. Seas 3 to 5 feet, occasionally to 6 feet. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 4 feet. A slight chance of showers and thunderstorms early in the evening. Winds and seas higher in and near thunderstorms. $$ GMZ472-210915- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 354 PM CDT Mon Jul 20 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .THIS AFTERNOON...West winds around 10 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. .TUESDAY...West winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. .TUESDAY NIGHT...West winds 15 to 20 knots with gusts up to 30 knots. Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms late. .WEDNESDAY...West winds 15 to 20 knots with gusts up to 30 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 5 feet at 5 seconds. A chance of showers and thunderstorms. .WEDNESDAY NIGHT...West winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 5 feet at 5 seconds. Showers likely with a chance of thunderstorms. .THURSDAY...West winds 10 to 15 knots with gusts up to 25 knots, increasing to 20 to 25 knots with gusts up to 40 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. A chance of thunderstorms. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. .THURSDAY NIGHT...West winds 25 to 30 knots, becoming southwest 20 to 25 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers and thunderstorms. .FRIDAY...Southwest winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet in the afternoon. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...Southwest winds around 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ475-210915- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 354 PM CDT Mon Jul 20 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .THIS AFTERNOON...Northwest winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Gusts up to 30 knots. Seas 2 to 4 feet. Wave Detail: West 4 feet at 4 seconds. A slight chance of showers and thunderstorms late. .TUESDAY...Northwest winds 15 to 20 knots with gusts up to 30 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 5 feet at 5 seconds. A chance of showers and thunderstorms. .TUESDAY NIGHT...West winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: West 6 feet at 5 seconds. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight. A chance of showers and thunderstorms late. .WEDNESDAY...West winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: West 7 feet at 6 seconds. Showers likely with a chance of thunderstorms. .WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to 35 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: West 8 feet at 6 seconds. Showers likely with a chance of thunderstorms. .THURSDAY...West winds 20 to 25 knots with gusts up to 35 knots, becoming southwest 25 to 30 knots with gusts up to 45 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Showers and thunderstorms likely, mainly in the morning. .THURSDAY NIGHT...Southwest winds 20 to 25 knots with gusts up to 35 knots, diminishing to 15 to 20 knots with gusts up to 25 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 4 feet after midnight. A chance of showers. .FRIDAY...Southwest winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late. .FRIDAY NIGHT...Southwest winds around 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$