FZUS54 KBRO 200800 CWFBRO Coastal Waters Forecast for the Lower Texas Coast National Weather Service Brownsville TX 300 AM CDT Wed May 20 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. GMZ100-202030- 300 AM CDT Wed May 20 2026 .SYNOPSIS...Light to moderate winds and low to moderate seas will prevail along the Lower Texas Coast through the forecast with a modest pressure gradient in place. Small Craft Advisory is not expected to be needed, but Small Craft Should Exercise Caution cannot be entirely ruled out. $$ GMZ130-132-135-202030- 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- 300 AM CDT Wed May 20 2026 .TODAY...East winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers and thunderstorms early this morning, then a slight chance of showers late this morning. .TONIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. .THURSDAY...Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. A moderate chop on the bay. A slight chance of showers and thunderstorms early in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .FRIDAY...Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. A moderate chop on the bay. A slight chance of thunderstorms in the morning. A chance of showers. A chance of thunderstorms in the afternoon. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop on the bay. 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. A moderate chop on the bay. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. A light chop on the bay. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...Southeast winds 5 to 10 knots. A light chop on the bay. A chance of thunderstorms. Showers likely until late afternoon, then a chance of showers late in the afternoon. .SUNDAY NIGHT...East winds 5 to 10 knots, becoming southeast early in the morning. A light chop on the bay, diminishing to smooth early in the morning. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ GMZ150-155-202030- Gulf waters from Port Mansfield to the Rio Grande out 20 nm- Gulf waters from Baffin Bay to Port Mansfield out 20 nm- 300 AM CDT Wed May 20 2026 .TODAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 8 seconds. A slight chance of showers and thunderstorms early this morning, then a chance of showers late this morning. .TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 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 slight chance of showers and thunderstorms early in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms early in the evening. A chance of showers with a slight chance of thunderstormsafter midnight. .FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight chance of thunderstorms. A chance of showers early in the morning, then a slight chance of showers in the afternoon. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers. A chance of thunderstorms early in the evening, then a slight chance of thunderstorms in the late evening and overnight. .SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms. .SATURDAY NIGHT...Southeast winds around 10 knots. Seas 3 to 4 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. .SUNDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. A chance of thunderstorms. Showers likely until late afternoon, then a chance of showers late in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 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. $$ GMZ170-175-202030- 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- 300 AM CDT Wed May 20 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...Southeast winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 5 feet at 8 seconds. A slight chance of showers and thunderstorms early this morning, then a slight chance of showers late this morning. .TONIGHT...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. .THURSDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms early in the morning, then a chance of showers and thunderstorms in the afternoon. .THURSDAY 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. .FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight chance of showers and thunderstorms. .FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms after midnight. .SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. .SUNDAY...Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots late in the afternoon. Seas 3 to 5 feet. Showers likely with a chance of thunderstorms until late afternoon, then a chance of showers with a slight chance of thunderstorms late in the afternoon. .SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. A slight chance of thunderstorms in the evening. A chance of showers. A chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$