FZUS54 KLCH 182010 CWFLCH Coastal Waters Forecast National Weather Service Lake Charles LA 310 PM CDT Mon May 18 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. GMZ400-190900- 310 PM CDT Mon May 18 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... Onshore winds around 20 knots will continue this afternoon and tonight maintaining seas in the 3-6 feet range. A Small Craft Advisory remains in effect through this evening. Winds will weaken Tuesday through the end of the week. Precipitation chances increase significantly Tuesday night through next Monday as a stalled frontal boundary and a series of upper level disturbances produce several waves of precipitation. $$ GMZ430-190900- Sabine Lake- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 10 to 15 knots. Lake waters choppy. .TUESDAY...Southeast winds 10 to 15 knots. Lake waters choppy. .TUESDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Lake waters choppy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .WEDNESDAY...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of showers with a slight chance of thunderstorms. .THURSDAY...Southeast winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .THURSDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .FRIDAY...South winds 5 to 10 knots. Lake waters light chop. Thunderstorms likely. Showers. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely. Winds and waves higher in and near thunderstorms. $$ GMZ432-190900- Calcasieu Lake- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Lake waters rough. .TUESDAY...Southeast winds 10 to 15 knots with gusts up to 20 knots. Lake waters choppy. .TUESDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Lake waters choppy. A chance of showers with a slight chance of thunderstorms after midnight. .WEDNESDAY...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. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of showers with a slight chance of thunderstorms. .THURSDAY...Southeast winds 5 to 10 knots, becoming south 10 to 15 knots with gusts up to 20 knots in the afternoon. Lake waters choppy. Showers likely with a chance of thunderstorms. .THURSDAY NIGHT...South winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Lake waters choppy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .FRIDAY...South winds 10 to 15 knots. Lake waters choppy. Thunderstorms likely. Showers likely. .FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY...South winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. Showers likely. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters light chop. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ435-190900- Vermilion and West Cote Blanche Bays- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Bay waters rough. .TUESDAY...Southeast winds 10 to 15 knots with gusts up to 20 knots. Bay waters choppy. .TUESDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Bay waters choppy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .WEDNESDAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A slight chance of thunderstorms. A chance of showers, mainly in the evening. .THURSDAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .THURSDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. .FRIDAY...South winds 10 to 15 knots. Bay waters choppy. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SATURDAY...South winds around 10 knots. Bay waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ436-190900- Atchafalaya and East Cote Blanche Bays- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 10 to 15 knots. Bay waters choppy. .TUESDAY...Southeast winds 10 to 15 knots. Bay waters choppy. .TUESDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Bay waters choppy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .WEDNESDAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A slight chance of thunderstorms in the evening. A slight chance of showers. .THURSDAY...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .THURSDAY 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. .FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms. .SATURDAY...South winds 5 to 10 knots. Bay waters light chop. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light chop. A chance of showers with a slight chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ450-190900- Coastal waters from Cameron LA to High Island TX out 20 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 5 seconds. .TUESDAY...Southeast winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds and southeast 3 feet at 7 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 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 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 2 to 3 feet. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. .FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely. Thunderstorms likely, mainly in the morning. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. .SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ452-190900- Coastal waters from Intracoastal City to Cameron LA out 20 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 5 seconds. .TUESDAY...Southeast winds around 15 knots with gusts up to 20 knots. Seas 2 to 4 feet. Wave Detail: South 4 feet at 6 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 3 seconds and south 3 feet at 6 seconds. A slight chance of showers and thunderstorms after midnight. .WEDNESDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 7 seconds. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds. A chance of showers and thunderstorms. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. 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. 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 2 to 3 feet. A chance of showers and thunderstorms. .SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. A chance of thunderstorms. Showers likely. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ455-190900- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds. .TUESDAY...Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds and south 1 foot at 7 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. A slight chance of showers and thunderstorms. .WEDNESDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds and southeast 1 foot at 3 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 2 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 1 foot at 2 seconds. A chance of showers and thunderstorms. .THURSDAY NIGHT...South winds around 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. .FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. A chance of showers and thunderstorms. .SATURDAY...Southeast winds around 10 knots. Seas around 2 feet. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet. A chance of showers with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$ GMZ470-190900- Coastal waters from Cameron LA to High Island TX from 20 to 60 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY...Southeast winds around 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms after midnight. .WEDNESDAY...Southeast winds around 10 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...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 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 morning, then showers likely in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 3 feet. 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 around 3 feet. 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 3 feet. A chance of showers and thunderstorms. .SATURDAY...Southeast winds 10 to 15 knots. Seas around 3 feet. Showers likely. A chance of thunderstorms, mainly in the morning. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 3 feet. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ472-190900- Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY...Southeast winds around 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. .WEDNESDAY...Southeast winds around 10 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 3 feet. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .FRIDAY...South winds 10 to 15 knots. Seas around 3 feet. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 3 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Southeast winds 10 to 15 knots. Seas around 3 feet. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 3 feet. A chance of showers with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$ GMZ475-190900- Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH LATE TONIGHT... .TONIGHT...Southeast winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY...Southeast winds around 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A slight chance of showers after midnight. .THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms after midnight. .FRIDAY...South 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. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$