Coastal Waters Forecast
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
426 FZUS54 KLCH 210951 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 451 AM CDT Tue Jul 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. GMZ400-212230- 451 AM CDT Tue Jul 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... High pressure over the northwest Gulf and the circulation around Tropical Storm Bertha will bring modest west northwest winds into Wednesday. Marine conditions for Wednesday night through Friday will depend on the eventual track and strength of Tropical Storm Bertha as it moves just inland or over the northwest Gulf. All marine interests should continue to monitor updates on Tropical Storm Bertha. $$ GMZ430-212230- Sabine Lake- 451 AM CDT Tue Jul 21 2026 .TODAY...West winds 5 to 10 knots. Lake waters light chop. .TONIGHT...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms late. .WEDNESDAY NIGHT...Southwest winds 5 to 10 knots, becoming north after midnight. Lake waters light chop. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. .THURSDAY...North winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Northeast winds 20 to 25 knots, becoming southeast after midnight. Lake waters very rough. A chance of showers and thunderstorms early in the evening. .FRIDAY...South winds 10 to 15 knots with gusts up to 20 knots, becoming southwest 5 to 10 knots in the afternoon. Lake waters choppy. A slight chance of showers and thunderstorms in the morning. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. A slight chance of thunderstorms. A chance of showers. .SATURDAY...Southwest winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight. Winds and waves higher in and near thunderstorms. $$ GMZ432-212230- Calcasieu Lake- 451 AM CDT Tue Jul 21 2026 .TODAY...West winds 5 to 10 knots. Lake waters light chop. .TONIGHT...West winds 5 to 10 knots. Lake waters light chop. .WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms late. .WEDNESDAY NIGHT...West winds 5 to 10 knots, becoming north after midnight. Lake waters light chop. A chance of showers and thunderstorms early in the evening, then a slight chance of thunderstorms late in the evening. A slight chance of showers in the late evening and early morning. .THURSDAY...North winds 5 to 10 knots, increasing to 20 to 25 knots with gusts up to 30 knots in the afternoon. Lake waters very rough. A chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots, becoming southeast 20 to 25 knots after midnight. Lake waters very rough. A chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. .FRIDAY...Southwest winds around 5 knots, increasing to around 10 knots in the afternoon. Lake waters light chop. A slight chance of showers and thunderstorms in the morning. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light chop. A slight chance of thunderstorms. A chance of showers until early morning, then a slight chance of showers late. .SATURDAY...Southwest winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light chop. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms in the late evening and overnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-212230- Vermilion and West Cote Blanche Bays- 451 AM CDT Tue Jul 21 2026 .TODAY...Northwest winds 10 to 15 knots. Bay waters choppy. A chance of showers and thunderstorms this afternoon. .TONIGHT...West winds 5 to 10 knots, becoming northwest 10 to 15 knots after midnight. Bay waters choppy. A chance of showers and thunderstorms in the evening. A slight chance of showers and thunderstorms late. .WEDNESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A slight chance of showers and thunderstorms late in the morning. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Northwest winds 10 to 15 knots, becoming north 25 to 30 knots with gusts up to 40 knots after midnight. Bay waters extremely rough. A chance of showers and thunderstorms. .THURSDAY...Northeast winds 25 to 30 knots with gusts up to 45 knots, becoming southeast 20 to 25 knots with gusts up to 30 knots in the afternoon. Bay waters extremely rough. A chance of thunderstorms. A chance of showers. .THURSDAY NIGHT...South winds 20 to 25 knots with gusts up to 30 knots, diminishing to around 10 knots with gusts up 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 in the late evening and overnight. .FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SATURDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms in the late evening and overnight. Winds and waves higher in and near thunderstorms. $$ GMZ436-212230- Atchafalaya and East Cote Blanche Bays- 451 AM CDT Tue Jul 21 2026 .TODAY...Northwest winds 10 to 15 knots. Bay waters choppy. A chance of showers and thunderstorms this afternoon. .TONIGHT...West winds 5 to 10 knots, becoming northwest 10 to 15 knots after midnight. Bay waters choppy. A chance of showers and thunderstorms. .WEDNESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...West winds 10 to 15 knots, becoming north 25 to 30 knots with gusts up to 40 knots after midnight. Bay waters extremely rough. A chance of thunderstorms. Showers likely. .THURSDAY...East winds 15 to 20 knots, becoming south 20 to 25 knots in the afternoon. Bay waters very rough. A chance of thunderstorms. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Bay waters choppy. A chance of showers and thunderstorms early in the evening, then a slight chance of showers and thunderstorms in the late evening and overnight. .FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A slight chance of thunderstorms. A slight chance of showers. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .SATURDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms in the evening. A chance of showers. A slight chance of thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ450-212230- Coastal waters from Cameron LA to High Island TX out 20 NM- 451 AM CDT Tue Jul 21 2026 .TODAY...West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds. .TONIGHT...Southwest winds 10 to 15 knots, becoming west 15 to 20 knots after midnight. 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. A slight chance of showers and thunderstorms late. .WEDNESDAY NIGHT...West winds 10 to 15 knots, becoming northwest after midnight. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening. .THURSDAY...North winds 10 to 15 knots, becoming west 15 to 20 knots in the afternoon. Seas around 2 feet. Wave Detail: North 2 feet at 3 seconds and west 2 feet at 5 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...North winds 15 to 20 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. .FRIDAY...Southwest winds 15 to 20 knots, diminishing to around 10 knots in the afternoon. Seas 2 to 3 feet. A slight chance of showers and thunderstorms in the morning. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. .SATURDAY...Southwest winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers. .SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ452-212230- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 451 AM CDT Tue Jul 21 2026 .TODAY...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northwest 3 feet at 4 seconds. .TONIGHT...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. .WEDNESDAY...West winds 15 to 20 knots. Seas 2 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A chance of showers and thunderstorms late. .WEDNESDAY NIGHT...West winds 10 to 15 knots with gusts up to 20 knots, becoming northwest 20 to 25 knots with gusts up to 30 knots after midnight. Seas 2 to 3 feet. Wave Detail: West 3 feet at 5 seconds. A chance of thunderstorms. A chance of showers until early morning, then showers likely late. .THURSDAY...North winds 25 to 30 knots with gusts up to 40 knots, diminishing to 15 to 20 knots with gusts up to 25 knots in the afternoon. Seas 2 to 4 feet. Wave Detail: Northwest 3 feet at 4 seconds and south 1 foot at 5 seconds. A chance of thunderstorms. A chance of showers. .THURSDAY NIGHT...South winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 5 seconds. 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 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. Seas around 2 feet. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .SATURDAY...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. .SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas around 2 feet. A slight chance of showers. A slight chance of thunderstorms early in the evening. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ455-212230- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 451 AM CDT Tue Jul 21 2026 .TODAY...Northwest winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 3 seconds. A chance of showers and thunderstorms this afternoon. .TONIGHT...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. .WEDNESDAY...West winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet. Wave Detail: West 3 feet at 4 seconds. A slight chance of showers and thunderstorms early in the morning. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Tropical storm conditions possible. West winds 15 to 20 knots with gusts up to 25 knots, becoming northwest 25 to 30 knots with gusts up to 40 knots after midnight. Seas 2 to 4 feet. Wave Detail: West 3 feet at 4 seconds. A chance of thunderstorms. Showers likely. .THURSDAY...Northwest winds 25 to 30 knots with gusts up to 40 knots, becoming south 15 to 20 knots with gusts up to 25 knots in the afternoon. Seas 2 to 4 feet. Wave Detail: West 3 feet at 4 seconds. A chance of showers and thunderstorms. .THURSDAY NIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. 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 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 chance of showers. A slight chance of thunderstorms early in the evening, then a chance of thunderstorms in the late evening and overnight. .SATURDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight. A slight chance of showers. A slight chance of thunderstorms early in the evening. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ470-212230- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 451 AM CDT Tue Jul 21 2026 .TODAY...West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. .TONIGHT...West winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. 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 3 feet at 5 seconds. A slight chance of showers and thunderstorms early in the morning. .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 5 seconds. A chance of showers and thunderstorms. .THURSDAY...West winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: West 3 feet at 5 seconds and south 2 feet at 4 seconds. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late. .THURSDAY NIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 6 seconds. A slight chance of thunderstorms early in the evening. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .FRIDAY...Southwest winds around 10 knots. Seas around 2 feet. A chance of showers with a slight chance of thunderstorms early in the morning. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers until early morning. A slight chance of thunderstorms after midnight. A slight chance of showers late. .SATURDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A chance of showers. .SATURDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms early in the evening. A slight chance of showers in the late evening and overnight. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ472-212230- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 451 AM CDT Tue Jul 21 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH THIS EVENING... .TODAY...Northwest winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: North 4 feet at 4 seconds. .TONIGHT...West winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 4 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. .WEDNESDAY...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. A slight chance of showers and thunderstorms early in the morning. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...West winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. Showers likely with a chance of thunderstorms. .THURSDAY...Northwest winds 20 to 25 knots with gusts up to 35 knots, becoming west 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West 3 feet at 5 seconds and south 2 feet at 6 seconds. A chance of thunderstorms. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. .THURSDAY NIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 6 seconds and southeast 2 feet at 5 seconds. A slight chance of thunderstorms in the evening. A chance of showers. A chance of thunderstorms after midnight. .FRIDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms until late afternoon. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of thunderstorms. A chance of showers until early morning, then a slight chance of showers late. .SATURDAY...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. .SATURDAY NIGHT...South winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas around 2 feet. A slight chance of showers. A slight chance of thunderstorms early in the evening. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ475-212230- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 451 AM CDT Tue Jul 21 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH THIS EVENING... .TODAY...Northwest winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest 5 feet at 6 seconds and east 1 foot at 6 seconds. A slight chance of showers and thunderstorms. .TONIGHT...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: Northwest 6 feet at 6 seconds and east 1 foot at 7 seconds. A chance of showers and thunderstorms. .WEDNESDAY...West winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northwest 6 feet at 6 seconds. A chance of showers and thunderstorms. .WEDNESDAY NIGHT...West winds 15 to 20 knots with gusts up to 25 knots, increasing to 25 to 30 knots with gusts up to 40 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: West 7 feet at 6 seconds and south 2 feet at 6 seconds. A chance of thunderstorms. Showers. .THURSDAY...West winds 25 to 30 knots with gusts up to 40 knots, becoming southwest 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet in the afternoon. Wave Detail: Southwest 6 feet at 6 seconds. A chance of thunderstorms. Showers early in the morning, then a chance of showers in the late morning and afternoon. .THURSDAY NIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: South 4 feet at 6 seconds. A slight chance of thunderstorms in the evening. A chance of showers. A chance of thunderstorms after midnight. .FRIDAY...South winds around 10 knots. 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...South winds around 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms. .SATURDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. A chance of showers in the morning. A chance of thunderstorms. A slight chance of showers in the afternoon. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers. A slight chance of thunderstorms early in the evening. A slight chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$