Marine Weather Net

Bay and Waterways from Port Aransas to Port O'Connor Marine Forecast


REST OF TODAY

S
WINDS
5 - 10
KNOTS

TONIGHT

S
WINDS
10 - 15
KNOTS

WEDNESDAY

SW
WINDS
10 - 15
KNOTS

WEDNESDAY NIGHT

N
WINDS
20 - 25
KNOTS

The Marine Weather Forecast In Detail:
GMZ235 Forecast Issued: 1059 AM CDT Tue Apr 05 2022

Rest Of Today...South Wind 5 To 10 Knots. Bays Smooth. Patchy Fog Late In The Morning.
Tonight...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy. Patchy Fog In The Evening, Then Areas Of Fog After Midnight.
Wednesday...Southwest Wind 10 To 15 Knots Becoming North 15 To 20 Knots In The Afternoon. Bays Choppy To Occasionally Rough.
Wednesday Night...North Wind 20 To 25 Knots. Bays Choppy To Rough.
Thursday...North Wind 15 To 20 Knots. Bays Choppy To Occasionally Rough.
Thursday Night...Northeast Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Friday...Northwest Wind 10 To 15 Knots Shifting West In The Afternoon. Bays Slightly Choppy To Occasionally Choppy.
Friday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Saturday...South Wind 10 To 15 Knots Increasing To 15 To 20 Knots In The Afternoon. Bays Choppy.
Saturday Night...South Wind Around 20 Knots. Bays Choppy To Occasionally Rough.
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Area Forecast Discussion
National Weather Service Corpus Christi TX
140am CDT Wednesday July 22 2026

Issued at 124am CDT Wednesday July 22 2026

A mid-level ridge located over the central Great Plains continues to be the predominant feature driving hot and relatively dry conditions across the CWA (County Warning Area) on Wednesday into Thursday morning. Subsidence aloft will promote highs in the upper-90s along the Coastal Bend, and up to 100-105 degF elsewhere. These highs coupled with dewpoints in the 60s and 70s will promote heat indices ranging from 105-113 degF, introducing a moderate to major (levels 2/3-4) HeatRisk. A Heat Advisory is in effect Wednesday throughout much of the CWA. The forecast changes very little on Thursday, so an additional Heat Advisory is likely.

Tropical Storm Bertha continues to move slowly westward across the northern Gulf. The cyclone remains heavily sheared, and the low level center is exposed. Bertha is now expected to gradually weaken as vertical shear increases and land interaction becomes likely. The storm is forecast to pass over or just south of Coastal Louisiana and arrive in the vicinity of East Texas on Thursday. The aforementioned vertical shear will accentuate the northeast to southwest tilt of TS Bertha's vortex. As a consequence, PVA and deep moisture associated with TS Bertha may be in place over the CWA on Thursday evening into the early overnight hours. Due to this environment, isolated to scattered showers and thunderstorms (35- 55%) are possible. While TS Bertha will likely remain north and lose strength, higher surf and an elevated risk of rip currents is generally expected this weekend.

Marine
Issued at 124am CDT Wednesday July 22 2026

A gentle to moderate (BF 3-4) southerly flow will persist through the week, with periods of Fresh (BF-5) flow at times from Port of Aransas south over the nearshore waters. As Bertha continues to move slowly westward increasing swell and building seas accompanied by isolated to scattered rain chances toward late this week can generally be expected. Will continue monitoring impacts from the storm as uncertainty remains significant this far out. Forecast details will continue to be refined as additional observational data becomes available.

Fire Weather
Issued at 124am CDT Wednesday July 22 2026

Heat continues to build through mid-week with a Heat Advisory across much of the region Wednesday. Probabilities for rain are minimal through Thursday but increase late this workweek with low to moderate chances (35-55%) Thursday into Friday across much of South Texas. Tropical Storm Bertha has shifted slightly south but the overall track remains close to the coast and is expected to enter into a less conducive environment after interacting with the Louisiana Peninsula. Overall fire weather concerns remain limited despite low RH values (20-30%) early this week due to low winds, ERC values and fuel dryness. As such, elevated fire weather is not expected at this time.

NOAA Corpus Christi TX Office: Watches - Warnings - Advisories
TX...
Heat Advisory from noon today to 8pm CDT this evening for TXZ229>234-239>244-246-247-347.

GM...None.