| NWS Forecast for: Waters from Port Mansfield TX to the Rio Grande River from 20 to 60 NM (GMZ170) Issued by: National Weather Service Brownsville, TX Last Update: 135 AM CDT Sat Apr 18 2026 |  |
| Today: Southeast winds 10 to 15 knots, becoming east late this afternoon. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 7 seconds. Tonight: East winds around 10 knots, becoming northeast after midnight, then increasing to 15 to 20 knots early in the morning. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 7 seconds and southeast 2 feet at 3 seconds. A slight chance of showers in the evening. A slight chance of thunderstorms in the late evening and overnight. Showers after midnight. Sunday: Northeast winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave detail: northeast 7 feet at 7 seconds and north 2 feet at 4 seconds. A slight chance of thunderstorms. Showers. Sunday Night: Northeast winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave detail: northeast 7 feet at 7 seconds. Showers likely with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Monday: East winds around 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 5 feet at 7 seconds. Showers likely. Monday Night: East winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 5 feet at 7 seconds. A chance of thunderstorms. Showers likely early in the evening, then a chance of showers in the late evening and overnight. Tuesday: Southeast winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. A chance of showers with a slight chance of thunderstorms. Tuesday Night: Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A slight chance of thunderstorms. A chance of showers early in the evening, then a slight chance of showers in the late evening and overnight. Wednesday: Southeast winds around 10 knots. Seas 3 to 4 feet. A slight chance of thunderstorms early in the morning. A slight chance of showers. Wednesday Night: Southeast winds 10 to 15 knots. Seas 3 to 5 feet. A slight chance of showers early in the evening. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Waters from Port Mansfield TX to the Rio Grande River from 20 to 60 NM (GMZ170) | |
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