National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 102016
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
316 PM CDT Tue Mar 10 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.

GMZ100-110915
316 PM CDT Tue Mar 10 2026

SYNOPSIS
Courtesy of strong southerly winds 15 to 25 knots gusting up to 30 knots, we've decided to issue a Small Craft Advisory for the Laguna Madre and the Gulf Waters through this evening/tonight. The Small Craft Advisory is in effect till 1 AM CDT Wednesday for the Laguna Madre and the Nearshore Waters, and till 7 AM CDT Wednesday for the Offshore Waters. On Wednesday, Small Craft Exercise Caution (SCEC) conditions will take place over the Bay and Gulf Waters. Following the cool fropa and dryline, hazardous marine conditions are expected to develop late Wednesday night through Thursday. A Small Craft Advisory (SCA) is possible during that time.

---

GMZ130-132-135-110915
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
316 PM CDT Tue Mar 10 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT WEDNESDAY

TONIGHT
Southeast winds 20 to 25 knots with gusts up to 30 knots becoming south 15 to 20 knots after midnight. Rough on the bay becoming choppy after midnight.

WEDNESDAY
South winds 10 to 15 knots becoming west 5 to 10 knots in the afternoon. A moderate chop on the bay becoming light chop in the afternoon.

WEDNESDAY NIGHT
Southeast winds 5 to 10 knots becoming north 15 to 20 knots after midnight. Light chop on the bay becoming choppy after midnight.

THURSDAY
North winds 15 to 20 knots. Choppy on the bay.

THURSDAY NIGHT
Northeast winds 10 to 15 knots becoming east around 5 knots after midnight. A moderate chop on the bay becoming smooth after midnight.

FRIDAY
Southeast winds around 5 knots increasing to 5 to 10 knots in the afternoon. Smooth on the bay becoming light chop in the afternoon.

FRIDAY NIGHT
Southeast winds 5 to 10 knots. Light chop on the bay.

SATURDAY
South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Light chop on the bay becoming a moderate chop in the afternoon.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. A moderate chop on the bay.

SUNDAY
South winds 10 to 15 knots. A moderate chop on the bay.

SUNDAY NIGHT
Southeast winds 10 to 15 knots becoming east after midnight. A moderate chop on the bay.

---

GMZ150-155-110915
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
316 PM CDT Tue Mar 10 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT WEDNESDAY

TONIGHT
Southeast winds 20 to 25 knots with gusts up to 30 knots becoming south 15 to 20 knots after midnight. Seas 4 to 6 feet, with occasional seas up to 7 feet. Wave Detail: Southeast 6 feet at 7 seconds.

WEDNESDAY
South winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds.

WEDNESDAY NIGHT
South winds around 5 knots becoming north 15 to 20 knots after midnight. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds and north 1 foot at 3 seconds.

THURSDAY
North winds 20 to 25 knots decreasing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, with occasional seas up to 11 feet. Wave Detail: North 9 feet at 6 seconds.

THURSDAY NIGHT
Northeast winds 10 to 15 knots becoming east 5 to 10 knots after midnight. Seas 4 to 6 feet, with occasional seas up to 7 feet subsiding to 3 to 4 feet after midnight. Wave Detail: Northeast 5 feet at 7 seconds and north 2 feet at 4 seconds becoming northeast 4 feet at 7 seconds.

FRIDAY
Southeast winds around 5 knots increasing to 5 to 10 knots in the afternoon. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 7 seconds.

FRIDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 4 feet.

SATURDAY
South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet.

SUNDAY
South winds 10 to 15 knots. Seas 3 to 4 feet.

SUNDAY NIGHT
South winds 10 to 15 knots becoming east after midnight. Seas 3 to 5 feet.

---

GMZ170-175-110915
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
316 PM CDT Tue Mar 10 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING

TONIGHT
Southeast winds 20 to 25 knots. Seas 5 to 7 feet, with occasional seas up to 8 feet. Wave Detail: Southeast 7 feet at 7 seconds.

WEDNESDAY
South winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Seas 5 to 7 feet, with occasional seas up to 8 feet subsiding to 4 to 5 feet in the afternoon. Wave Detail: Southeast 6 feet at 7 seconds becoming southeast 5 feet at 7 seconds.

WEDNESDAY NIGHT
South winds 5 to 10 knots becoming north 15 to 20 knots after midnight. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds and north 2 feet at 3 seconds.

THURSDAY
North winds 20 to 25 knots with gusts up to 30 knots decreasing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, with occasional seas up to 11 feet. Wave Detail: Northeast 8 feet at 7 seconds and north 6 feet at 8 seconds.

THURSDAY NIGHT
Northeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Seas 5 to 7 feet, with occasional seas up to 8 feet subsiding to 3 to 5 feet after midnight. Wave Detail: Northeast 6 feet at 8 seconds and north 4 feet at 7 seconds becoming northeast 4 feet at 8 seconds and north 2 feet at 5 seconds.

FRIDAY
East winds 5 to 10 knots becoming southeast in the afternoon. Seas 3 to 4 feet. Wave Detail: Northeast 4 feet at 7 seconds.

FRIDAY NIGHT
Southeast winds 5 to 10 knots. Seas 3 to 4 feet.

SATURDAY
Southeast winds around 10 knots. Seas 3 to 4 feet.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet.

SUNDAY
South winds 10 to 15 knots. Seas 3 to 5 feet.

SUNDAY NIGHT
South winds 10 to 15 knots becoming southeast after midnight. Seas 3 to 5 feet.