FZUS54 KBRO 181914 CWFBRO Coastal Waters Forecast for the Lower Texas Coast National Weather Service Brownsville TX 214 PM CDT Mon May 18 2026 Lower Texas coastal waters from Baffin Bay to the mouth of the Rio Grande out 60 NM. Seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 10 percent of the waves. GMZ100-190815- 214 PM CDT Mon May 18 2026 .SYNOPSIS...A Small Craft Advisory remains in effect through 9 AM tomorrow and Small Craft Exercise Caution is likely in the wake of the advisory as well. An enhanced pressure gradient will maintain hazardous to adverse marine conditions with moderate to fresh southeasterly winds, moderate seas, and choppy bay conditions through much of the week. Low to medium (30 to 60 percent) rain chances return Tuesday night, lasting through the week. $$ GMZ130-132-135-190815- Laguna Madre from the Port of Brownsville to the Arroyo Colorado- Laguna Madre from the Arroyo Colorado To 5 NM north of Port Mansfield TX- Laguna Madre from 5 nm north of Port Mansfield to Baffin Bay TX- 214 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .TONIGHT...Southeast winds 15 to 20 knots. Choppy on the bay. .TUESDAY...Southeast winds around 15 knots. A moderate chop on the bay. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers and thunderstorms after midnight. .WEDNESDAY...Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers with a slight chance of thunderstorms early in the morning. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. .THURSDAY...Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers. A slight chance of thunderstorms early in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 10 to 15 knots, becoming south 5 to 10 knots early in the morning. A moderate chop on the bay, diminishing to light chop early in the morning. A slight chance of showers in the evening. A chance of thunderstorms. A chance of showers after midnight. .FRIDAY...South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Light chop on the bay, increasing to a moderate chop in the afternoon. A chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers. A chance of thunderstorms until early morning, then a slight chance of thunderstorms early in the morning. .SATURDAY...Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. A moderate chop on the bay. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Light chop on the bay. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ150-155-190815- Gulf waters from Port Mansfield to the Rio Grande out 20 nm- Gulf waters from Baffin Bay to Port Mansfield out 20 nm- 214 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .TONIGHT...Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 8 seconds. .TUESDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 5 feet in the afternoon. Wave Detail: Southeast 6 feet at 8 seconds, becoming southeast 5 feet at 8 seconds. .TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms after midnight. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms early in the morning. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds. .THURSDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A chance of showers. A slight chance of thunderstorms early in the morning, then a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 10 to 15 knots, becoming south early in the morning. Seas 3 to 5 feet. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. .FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers. A chance of thunderstorms until late afternoon, then a slight chance of thunderstorms late in the afternoon. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers. A chance of thunderstorms, mainly in the evening. .SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .SATURDAY NIGHT...Southeast winds around 10 knots. Seas 3 to 4 feet. A chance of showers in the evening. A chance of thunderstorms. Showers likely after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ170-175-190815- Gulf waters from Port Mansfield to the Rio Grande extending from 20 to 60 nm- Gulf waters from Baffin Bay to Port Mansfield extending from 20 to 60 nm- 214 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .TONIGHT...Southeast winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Southeast 6 feet at 8 seconds. .TUESDAY...Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 8 seconds. .TUESDAY NIGHT...Southeast winds around 15 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms after midnight. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 5 feet in the afternoon. Wave Detail: Southeast 6 feet at 8 seconds, becoming southeast 5 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms early in the morning. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. .THURSDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms. .THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A chance of showers early in the evening. A chance of showers and thunderstorms after midnight. .FRIDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late in the afternoon. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet. A chance of showers with a slight chance of thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$