Port Update
Corpus Christi, Texas
August 18, 2025
Notices
🌅SUNRISE: 0700 hrs.
🌄SUNSET: 2000 hrs.
===================
Central Daylight Time
GMT-5
MARSEC LEVEL 1
========================================
When Outbound Passages are restricted to pilot boarding no earlier than Sunrise and later than the time detailed below for the various locations:
FROM VIOLA BASIN: -5 1/2 HOURS BEFORE SUNSET
FROM TULE BASIN: - 5 HOURS BEFORE SUNSET
FROM CHEMICAL BASIN: 4 1/2 HOURS BEFORE SUNSET
FROM AVERY BASIN: 4 HOURS BEFORE SUNSET
FROM MAIN BASIN: 3 1/2 HOURS BEFORE SUNSET
FROM INGLESIDE: 2 1/2 HOURS BEFORE SUNSET
========================================
PORT OF CORPUS CHRISTI OPEN
==============================
Please see attached MSIB 90-24 The Coast Guard is advising all mariners to exercise caution and remain within the skin of the ship while transiting under the Corpus Christi New Harbor Bridge due to fall hazards created during construction.
It is recommended practice until further notice to ensure safety of vessel and crew during transit.
Please see attached for more information.
===================================
Please find attached MSIB 17-25 regarding Vessel Surge Events – Safety Recommendations from the U.S. Coast Guard.
Please read attached Vessel Surge Recommendations.
===========================================
Please find attached MSIB 111-23 for GANGWAY SAFETY REQUIREMENTS
=================================================
Please find attached MSIB 36-25 as the 2025 Hurricane Season commences 1st JUNE and continues thru 30 NOVEMBER.
Please see attached for more information.
================================
Please find attached MSIB 76-25 as the Port of Harlingen noticed the Coast Guard that construction has begun on their main dock in the turning basin, work commenced 4 August 2025 and will continue through 25 April 2026.
Monday – Saturday 0700 to 1730.
Please see attached for more information.
Weather / Marine Zone Forecast
Coastal Waters Forecast for Texas National Weather Service Corpus Christi TX
1243 AM CDT Mon Aug 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.
GMZ200-181845-
1243 AM CDT Mon Aug 18 2025
.SYNOPSIS FOR THE MIDDLE TEXAS COASTAL WATERS...
A persistent light to gentle breeze (BF 2-3) can be expected this week.
There will be a medium (45-60%) chance for showers and thunderstorms beginning Tuesday and continuing through the end of the week.
$$
GMZ236-237-181845- Copano, Aransas, and Redfish Bays- San Antonio, Mesquite, and Espiritu Santo Bays-
1243 AM CDT Mon Aug 18 2025
.TODAY...South winds around 5 knots, becoming southeast this afternoon. Bay and inland waters smooth.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.TUESDAY...Northwest winds around 5 knots, becoming east in the afternoon. Bay and inland waters smooth.
A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth. A slight chance of showers. A slight chance of thunderstorms after midnight.
.WEDNESDAY...Northwest winds around 5 knots, becoming east in the afternoon. Bay and inland waters smooth. A slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.THURSDAY...Northwest winds around 5 knots, becoming southeast in the afternoon. Bay and inland waters smooth. A chance of showers and thunderstorms in the afternoon.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth. A chance of showers and thunderstorms after midnight.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in the afternoon. Bay and inland waters smooth. A chance of showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth. A chance of showers and thunderstorms after midnight.
Winds and waves higher in and near thunderstorms.
$$
GMZ231-232-181845- Baffin Bay and Upper Laguna Madre-Corpus Christi and Nueces Bays-
1243 AM CDT Mon Aug 18 2025
.TODAY...South winds around 5 knots, becoming east this afternoon. Bay and inland waters smooth.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.TUESDAY...West winds around 5 knots, becoming east in the afternoon. Bay and inland waters smooth. A slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth. A slight chance of showers.
.WEDNESDAY...Northwest winds around 5 knots, becoming east in the afternoon. Bay and inland waters smooth. A slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.THURSDAY...Northwest winds around 5 knots, becoming east in the afternoon. Bay and inland waters smooth.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth.
.FRIDAY...West winds 5 to 10 knots, becoming east in the afternoon. Bay and inland waters smooth. A chance of showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Bay and inland waters smooth. A chance of showers and thunderstorms after midnight.
Winds and waves higher in and near thunderstorms.
$$
GMZ255-181845- Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM-
1243 AM CDT Mon Aug 18 2025
.TODAY...South winds around 5 knots, becoming east this afternoon. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds. A slight chance of showers and thunderstorms after midnight.
.TUESDAY...West winds 5 to 10 knots, becoming east in the afternoon. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds. A chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: East 1 foot at 4 seconds. A slight chance of showers and thunderstorms after midnight.
.WEDNESDAY...Northwest winds 5 to 10 knots, becoming east in the afternoon. Seas around 2 feet or less. Wave Detail: Northwest 1 foot at 2 seconds and east 1 foot at 4 seconds.
A slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: East 1 foot at 4 seconds.
.THURSDAY...Northwest winds around 5 knots, becoming east in the afternoon. Seas around 2 feet or less. A chance of thunderstorms in the morning. A chance of showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. A chance of showers and thunderstorms after midnight.
.FRIDAY...West winds 5 to 10 knots, becoming east in the afternoon. Seas around 2 feet or less. A chance of thunderstorms in the morning. A chance of showers.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. A chance of showers and thunderstorms after midnight.
Winds and seas higher in and near thunderstorms.
$$
GMZ250-181845- Coastal waters from Baffin Bay to Port Aransas out 20 NM-
1243 AM CDT Mon Aug 18 2025
.TODAY...South winds around 5 knots, becoming southeast late this morning, then becoming east this afternoon. Seas around 2 feet this morning, then around 2 feet or less.
Wave Detail: Southeast 2 feet at 5 seconds, becoming southeast 1 foot at 5 seconds.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds.
.TUESDAY...West winds around 5 knots, becoming east in the afternoon. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 4 seconds. A slight chance of showers after midnight.
.WEDNESDAY...Northwest winds around 5 knots, becoming east in the afternoon. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms in the morning.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: East 1 foot at 3 seconds.
.THURSDAY...West winds around 5 knots, becoming east in the afternoon. Seas around 2 feet or less.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less.
.FRIDAY...West winds 5 to 10 knots, becoming east in the afternoon. Seas around 2 feet or less. A chance of showers and thunderstorms in the morning.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. A chance of showers and thunderstorms after midnight.
Winds and seas higher in and near thunderstorms.
$$
GMZ270-275-181845- 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-
1243 AM CDT Mon Aug 18 2025
.TODAY...South winds around 5 knots, becoming northeast late this morning and afternoon. Seas around 2 feet this morning, then around 2 feet or less.
Wave Detail: Southeast 2 feet at 5 seconds, becoming east 1 foot at 5 seconds.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: Southeast 1 foot at 5 seconds. A slight chance of showers and thunderstorms after midnight.
.TUESDAY...Northwest winds 5 to 10 knots, becoming northeast in the afternoon. Seas around 2 feet or less. Wave Detail: Northwest 1 foot at 2 seconds and southeast 1 foot at 5 seconds.
A chance of showers and thunderstorms, mainly in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots, becoming southeast after midnight. Seas around 2 feet or less. Wave Detail: East 1 foot at 3 seconds. A slight chance of showers and thunderstorms after midnight.
.WEDNESDAY...Northwest winds 5 to 10 knots, becoming northeast in the afternoon. Seas around 2 feet or less. Wave Detail: East 1 foot at 4 seconds.
A chance of showers with a slight chance of thunderstorms in the morning.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. Wave Detail: East 1 foot at 4 seconds.
.THURSDAY...Northwest winds around 5 knots, becoming northeast in the afternoon. Seas around 2 feet or less. A chance of showers and thunderstorms in the morning.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. A chance of showers and thunderstorms after midnight.
.FRIDAY...West winds 5 to 10 knots, becoming northeast in the afternoon. Seas around 2 feet or less. A chance of showers and thunderstorms in the morning.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet or less. A chance of showers and thunderstorms after midnight.
Winds and seas higher in and near thunderstorms.
