Baffin Bay to Port Mansfield, TX 20 - 60 NM Marine Forecast
| Tonight...South Winds 10 To 15 Knots. Seas 2 To 4 Feet. Wave Detail: Southeast 3 Feet At 5 Seconds. |
| Monday...South Winds 10 To 15 Knots Decreasing To 5 To 10 Knots In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 5 Seconds. |
| Monday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: South 2 Feet At 4 Seconds And East 1 Foot At 9 Seconds. |
| Tuesday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: South 2 Feet At 4 Seconds And East 1 Foot At 9 Seconds. |
| Tuesday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: South 2 Feet At 4 Seconds And East 1 Foot At 9 Seconds. |
| Wednesday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. |
| Wednesday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. |
| Thursday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. |
| Thursday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. |
| Friday...South Winds 5 To 10 Knots Becoming Southeast In The Afternoon. Seas 2 To 3 Feet. |
| Friday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. |
| Area Forecast Discussion ...UPDATED National Weather Service Brownsville TX 624am CDT Sunday July 19 2026 Issued at 1017pm CDT Sat July 18 2026 A pair of high pressures aloft maintain warmer than average temperatures and dry conditions across deep south Texas into next weekend; a weakening high pressure over coastal Texas retreats westward to northern Mexico while another builds and shifts east- southeastward from the Rockies to the Plains by the middle of next week, further building to near 597 dam and sagging southward to the Southern Plains later next week. Southeasterly onshore winds will continue to advect Gulf moisture inland, peaking during the afternoon and evening hours, decreasing from 25-30+ mph on Sunday to 20-25+ mph by Monday. Yet, at the same time, increased subsidence and a well-mixed atmosphere are expected to lead to drier than average moisture content. The combined effect of these factors is likely to soar afternoon heat indices to around 105-110 F, or a few degrees warmer, as well as bring mostly moderate heat risks across deep south Texas into next weekend while portions of the Rio Grande Plains and populated regions of the Rio Grande Valley experience a major heat risk. Another SPS is in effect from 11am to 7pm on Sunday for southern Hidalgo as well as the coastal and inland portions of Cameron, Willacy and Kenedy counties (except for the barrier islands) as heat indices peak around 108-111 F for several hours. Additional SPSs and a heat advisory, or two, remain possible each day. Additionally, persistent lower relative humidity values, breezy winds and normal to dry fuels create the risk of spreading any fires that develop. This has led to the issuance of a RFD for most areas of Deep South Texas on Sunday, excepting the coastal and island areas. Additional RFDs are possible throughout the next 7 days. Actual forecast maximum air temperatures are anticipated to range around 1 to 5 degrees F above average, with mainly widespread low/mid 100s (100-106 F) across inland areas, perhaps hitting upper 100s (107+ F) in the Rio Grande Plains. There is even the potential for some coastal areas near the western side of the Laguna Madre to hit the century mark by the middle part of next week as subsidence enhances even further. In general, forecast highs are currently forecast to tie and potentially exceed record maximum temperatures, particularly Tuesday into Thursday. A medium risk of rip currents continues through Sunday afternoon. Marine Issued at 1017pm CDT Sat July 18 2026 Moderate to fresh southeasterly winds, moderate (3-5 ft) seas and periods of Small Craft Exercise Caution conditions are likely to become mostly gentle to moderate southeasterly winds with slight to moderate (1-3 ft) seas by next Tuesday. Dry conditions are expected to continue. NOAA Brownsville TX Office: Watches - Warnings - Advisories None. |
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