Marine Weather Net

Port Aransas to Matagorda Ship Channel Marine Forecast


REST OF TODAY

NE
WINDS
20
KNOTS

TONIGHT

NE
WINDS
15 - 20
KNOTS

TUESDAY

NE
WINDS
15 - 20
KNOTS

TUESDAY NIGHT

NE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ255 Forecast Issued: 156 PM CDT Mon Oct 05 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING
Rest Of Today...Northeast Winds Around 20 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms.
Tonight...Northeast Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 4 Feet At 6 Seconds. A Chance Of Showers. A Chance Of Thunderstorms, Mainly In The Evening.
Tuesday...Northeast Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots In The Afternoon. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 4 Feet At 6 Seconds. A Slight Chance Of Showers And Thunderstorms.
Tuesday Night...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 6 Seconds. A Slight Chance Of Showers. A Slight Chance Of Thunderstorms After Midnight.
Wednesday...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 5 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Wednesday Night...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 3 Feet At 5 Seconds. A Chance Of Showers After Midnight.
Thursday...Northeast Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Chance Of Showers And Thunderstorms.
Thursday Night...Northeast Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet.
Friday...Northeast Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Chance Of Showers.
Friday Night...Northeast Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots After Midnight. Seas 4 To 5 Feet, Occasionally To 6 Feet. A Chance Of Showers. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service Corpus Christi TX
124pm CDT Monday Oct 5 2026

Issued at 120pm CDT Monday Oct 5 2026

Mid level ridging along with a slightly drier airmass across S TX will keep rain chances very low through mid week. However, a broad mid level trough draped north to south across the western gulf and a broad surface low across the Bay of Campeche will continue to bring a medium to high chance of showers and thunderstorms to the Middle Texas Coastal Waters through mid week.

The forecast becomes more tricky by mid to late in the week due to the uncertainty with the possible development of a tropical system in the Bay of Campeche. There is now a 80% chance of tropical development over the next 7 days. If it does not develop, then S TX will likely have deeper moisture advection resulting in a more active daily sea breeze through next weekend, with a low to medium chance of convection and near to slightly above normal temperatures the latter half of the week.

However, if a tropical system does develop, it will likely stay east of S TX, keeping S TX on the drier side. This is due a mid level west to northwest flow ushering drier air across the region resulting in a low to very low chance of rain along, as well as higher max temps. For now, will maintain the medium to high Probability of Precipitation across the coastal waters and low (10-20%) across the Coastal Bend and Victoria Crossroads the latter part of the week and into the weekend.

The main concern if a tropical system developing over the gulf will be indirect impacts from an increased risk of coastal flooding, moderate to high rip current risk and seas possibly building up to 9 feet offshore. Currently a Coastal Flood Advisory is in effect through Tuesday evening due to a persistent northeast flow across the northwest gulf waters pushing water up to the dunes during times of high tide. The Coastal Flood Advisory may need to be extended if a tropical system does develop.

Marine
Issued at 120pm CDT Monday Oct 5 2026

A small craft advisory remains in effect through 7pm this evening for the Middle Texas Coastal Waters. Northeasterly winds will decrease slightly to a moderate to fresh (BF 4-5) northeasterly breeze tonight across the coastal waters and a gentle to moderate (BF 3-4) breeze across the bays. Winds are expected to restrengthen to a fresh to strong breeze by Thursday, mainly across the offshore waters. A medium to high chance of showers and thunderstorms will continue through the period.

Fire Weather
Issued at 120pm CDT Monday Oct 5 2026

No significant fire weather concerns are anticipated through the work week with mainly moderate humidity levels and weak winds. Rain chances are low through the middle of the week but could increase by the latter half.

NOAA Corpus Christi TX Office: Watches - Warnings - Advisories
TX...Coastal Flood Advisory until 7pm CDT Tuesday for TXZ345-442-443- 447.

GM...Small Craft Advisory until 7pm CDT this evening for GMZ250-255- 270-275.