Coastal Waters Forecast for Texas
National Weather Service Corpus Christi TX
1209 AM CST Thu Dec 18 2025
Middle Texas coastal waters from Baffin Bay to Matagorda ship channel out to 60 nautical miles.
Seas are provided as a range of the average height of the highest 1/3 of the waves
...along with occasional height of the average highest 10 percent of the waves.
GMZ200-181915-
1209 AM CST Thu Dec 18 2025
.SYNOPSIS FOR THE MIDDLE TEXAS COASTAL WATERS...
Gentle to moderate (BF 3-4) surface winds today will switch from southwesterly to northeasterly winds with a cold front passage.
Winds behind the front will increase to 20-25 kts between midnight to 6am Friday (seas increasing to 4-5 ft) with conditions decreasing through the remainder of Friday.
Gentle to moderate onshore flow returns by Saturday morning with 2-3 ft seas through the end of the forecast period.
$$
GMZ236-237-181915- Copano, Aransas, and Redfish Bays- San Antonio, Mesquite, and Espiritu Santo Bays-
1209 AM CST Thu Dec 18 2025
.REST OF TONIGHT...South winds around 5 knots, becoming southwest late. Bay and inland waters smooth. Patchy fog.
.THURSDAY...West winds 5 to 10 knots. Bay and inland waters smooth. Patchy fog in the morning.
.THURSDAY NIGHT...North winds 10 to 15 knots with gusts up to 20 knots. Bay and inland waters slightly choppy to occasionally choppy.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to 10 knots in the afternoon. Bay and inland waters slightly choppy to occasionally choppy.
.FRIDAY NIGHT...Southeast winds around 5 knots, becoming south after midnight. Bay and inland waters smooth.
.SATURDAY...South winds 5 to 10 knots. Bay and inland waters smooth.
.SATURDAY NIGHT...South winds 10 to 15 knots. Bay and inland waters slightly choppy to occasionally choppy.
.SUNDAY...South winds around 5 knots, becoming southeast in the afternoon. Bay and inland waters smooth.
.SUNDAY NIGHT...Southeast winds around 5 knots. Bay and inland waters smooth.
.MONDAY...Southeast winds 5 to 10 knots. Bay and inland waters smooth.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay and inland waters smooth.
$$
GMZ231-232-181915- Baffin Bay and Upper Laguna Madre-Corpus Christi and Nueces Bays-
1209 AM CST Thu Dec 18 2025
.REST OF TONIGHT...South winds 5 to 10 knots, becoming southwest late. Bay and inland waters smooth. Patchy fog.
.THURSDAY...Southwest winds 5 to 10 knots. Bay and inland waters smooth. Patchy fog in the morning.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Bay and inland waters choppy to occasionally rough.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to 10 knots in the afternoon. Bay and inland waters slightly choppy to occasionally choppy.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.SATURDAY...South winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots in the afternoon. Bay and inland waters slightly choppy to occasionally choppy.
.SATURDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Bay and inland waters slightly choppy to occasionally choppy.
.SUNDAY...South winds 5 to 10 knots, becoming southeast in the afternoon. Bay and inland waters smooth.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay and inland waters smooth.
.MONDAY...Southeast winds 5 to 10 knots. Bay and inland waters smooth.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay and inland waters smooth.
$$
GMZ255-181915- Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM-
1209 AM CST Thu Dec 18 2025
.REST OF TONIGHT...South winds 5 to 10 knots, becoming southwest late. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. A slight chance of thunderstorms. A slight chance of showers. Patchy fog.
.THURSDAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Patchy fog in the morning.
.THURSDAY NIGHT...North winds 15 to 20 knots, becoming northeast 20 to 25 knots after midnight. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet after midnight.
Wave Detail: Southeast 2 feet at 7 seconds, becoming southeast 5 feet at 7 seconds.
.FRIDAY...Northeast winds 15 to 20 knots, becoming east 5 to 10 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and south 1 foot at 6 seconds.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SATURDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.
.SUNDAY...South winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
Winds and seas higher in and near thunderstorms.
$$
GMZ250-181915- Coastal waters from Baffin Bay to Port Aransas out 20 NM-
1209 AM CST Thu Dec 18 2025
.REST OF TONIGHT...South winds around 10 knots, becoming southwest late. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Patchy fog.
.THURSDAY...West winds 5 to 10 knots, becoming southwest in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Patchy fog in the morning.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet after midnight.
Wave Detail: Northeast 2 feet at 3 seconds and southeast 2 feet at 7 seconds, becoming southeast 5 feet at 6 seconds.
.FRIDAY...Northeast winds 15 to 20 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 7 seconds and south 1 foot at 5 seconds.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SATURDAY...South winds around 10 knots, increasing to 15 to 20 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South 3 feet at 4 seconds and east 3 feet at 7 seconds.
.SATURDAY NIGHT...South winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet.
.SUNDAY...South winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY NIGHT...Southeast winds around 10 knots. Seas around 2 feet.
$$
GMZ270-275-181915- Waters from Baffin Bay to Port Aransas from 20 to 60 NM- Waters from Port Aransas to Matagorda Ship Channel from 20 to 60 NM-
1209 AM CST Thu Dec 18 2025
.REST OF TONIGHT...South winds 10 to 15 knots, becoming southwest late. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds.
A chance of showers with a slight chance of thunderstorms. Patchy fog.
.THURSDAY...Southwest winds 10 to 15 knots with gusts up to 20 knots, becoming west 5 to 10 knots in the afternoon. Seas around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Patchy fog in the morning.
.THURSDAY NIGHT...North winds 15 to 20 knots, becoming northeast 20 to 25 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 7 seconds and south 2 feet at 6 seconds.
.FRIDAY...Northeast winds 15 to 20 knots with gusts up to 25 knots, becoming east around 10 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet.
Wave Detail: Northeast 5 feet at 7 seconds and south 1 foot at 6 seconds.
.FRIDAY NIGHT...Southeast winds around 10 knots, becoming south with gusts up to 20 knots after midnight. Seas around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SATURDAY...South winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SATURDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet.
.SUNDAY...South winds 5 to 10 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Winds and seas higher in and near thunderstorms.