Texas Coastal Marine Forecast

Expires:202505202100;;835413
FZUS54 KLCH 200823
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
323 AM CDT Tue May 20 2025

Coastal waters from the Lower Atchafalaya River LA to High 
Island TX out 60 nautical miles including Sabine and 
Calcasieu Lakes and Vermilion and Cote Blanche Bays

Seas are provided as a range of the average height of the
highest one third of the waves, along with the occasional 
height of the average highest ten percent of the waves.


GMZ400-202100-
323 AM CDT Tue May 20 2025

.SYNOPSIS... 

Winds and wave remain elevated but are expected to slowly decrease
after sunrise. Exercise Caution headlines will be in effect
through tonight. Overnight a cold front will move across the
region bringing isolated showers and a few thunderstorms.

The remainder of the week will bring light onshore flow.

$$


Expires:202505202215;;838114
FZUS54 KHGX 200922
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
422 AM CDT Tue May 20 2025

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda
Bays.

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.


GMZ370-375-202215-
Waters from Freeport to Matagorda Ship Channel TX from 20 to
60 NM-Waters from High Island to Freeport TX from 20 to 60 NM-
422 AM CDT Tue May 20 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING...

.TODAY...South winds 15 to 20 knots, easing to around 10 knots.
Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast
6 feet at 7 seconds. 
.TONIGHT...South winds 5 to 10 knots, veering to northeast late. 
Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. 
.WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 7 seconds. 
.WEDNESDAY NIGHT...East winds 5 to 10 knots, veering to southeast
after midnight. Seas around 3 feet. Wave Detail: Southeast 3 feet
at 7 seconds. 
.THURSDAY...Southeast winds 5 to 10 knots. Seas around 3 feet in
the morning, then around 2 feet or less. Wave Detail: Southeast
3 feet at 7 seconds, becoming southeast 2 feet at 6 seconds. 
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
3 feet. Wave Detail: Southeast 2 feet at 6 seconds. 
.FRIDAY...Southeast winds 5 to 10 knots. Seas around 2 feet or
less, then around 3 feet in the afternoon. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas around
3 feet. 
.SATURDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. 
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet. 

$$

Expires:202505202215;;838113
FZUS54 KHGX 200922
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
422 AM CDT Tue May 20 2025

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda
Bays.

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.


GMZ350-355-202215-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
422 AM CDT Tue May 20 2025

...Small Craft Should Exercise Caution...

.TODAY...South winds 15 to 20 knots, easing to around 15 knots
late this morning and afternoon. Seas 4 to 6 feet, occasionally
to 8 feet. Wave Detail: Southeast 5 feet at 7 seconds. 
.TONIGHT...South winds around 10 knots, becoming northeast 10 to 
15 knots late. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 
7 seconds. 
.WEDNESDAY...East winds 10 to 15 knots, becoming around 10 knots
late. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at
7 seconds. 
.WEDNESDAY NIGHT...Southeast winds around 10 knots, veering to
south after midnight. Seas around 3 feet. Wave Detail: Southeast
3 feet at 7 seconds. 
.THURSDAY...Southeast winds 5 to 10 knots. Seas around 3 feet in
the morning, then around 2 feet or less. Wave Detail: Southeast
3 feet at 7 seconds, becoming southeast 2 feet at 6 seconds. 
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet or less. Wave Detail: Southeast 2 feet at 6 seconds. 
.FRIDAY...Southeast winds 5 to 10 knots. Seas around 2 feet or
less. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas around
3 feet. 
.SATURDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. 
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet. 

$$


Expires:202505202215;;838112
FZUS54 KHGX 200922
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
422 AM CDT Tue May 20 2025

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda
Bays.

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.


GMZ330-202215-
Matagorda Bay-
422 AM CDT Tue May 20 2025

...Small Craft Should Exercise Caution...

.TODAY...South winds 10 to 15 knots. Bay waters slightly choppy. 
.TONIGHT...Southeast winds 5 to 10 knots, becoming northeasterly 
after midnight. Bay waters smooth to slightly choppy. 
.WEDNESDAY...Northeast winds 10 to 15 knots, veering to east in
the afternoon. Bay waters slightly choppy. 
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, easing to
around 10 knots after midnight. Bay waters smooth. 
.THURSDAY...Southeast winds 5 to 10 knots. Bay waters smooth. 
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth. 
.FRIDAY...Southeast winds around 10 knots, rising to 10 to
15 knots in the afternoon. Bay waters smooth, rising to slightly
choppy in the afternoon. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy. 
.SATURDAY...South winds 10 to 15 knots. Bay waters slightly
choppy. 
.SATURDAY NIGHT...Southeast winds around 15 knots. Bay waters
slightly choppy to choppy. 

$$


Expires:202505202215;;838110
FZUS54 KHGX 200922
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
422 AM CDT Tue May 20 2025

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda
Bays.

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.


GMZ300-202215-
Synopsis for High Island to the Matagorda Ship Channel out
60 nautical miles including Galveston and Matagorda Bays
422 AM CDT Tue May 20 2025

.Synopsis For High Island to the Matagorda Ship Channel Out 60 NM
including Galveston and Matagorda Bays.

Winds and seas are expected to decrease through the day today as 
a weakening frontal boundary approaches. Isolated showers and 
thunderstorms cannot be ruled out late this evening as the weak 
boundary moves closer to the coast. A brief northwesterly wind
shift is expected on Wednesday following as the boundary enters
the coastal waters, but light to occasionally moderate onshore winds
are expected to return by Wednesday night through the weekend.

$$


Texas Coastal Marine Forecast

Expires:202505202115;;835517
FZUS54 KCRP 200826
CWFCRP

Coastal Waters Forecast for Texas
National Weather Service Corpus Christi TX
326 AM CDT Tue May 20 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. 
 


GMZ270-275-202115-
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-
326 AM CDT Tue May 20 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...South winds 10 to 15 knots with gusts up to 20 knots,
becoming southeast 5 to 10 knots late this morning and afternoon.
Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to
5 feet, occasionally to 6 feet this afternoon. Wave Detail:
Southeast 6 feet at 7 seconds, becoming southeast 5 feet at
7 seconds. 
.TONIGHT...Southeast winds 5 to 10 knots, becoming east after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
Southeast 4 feet at 7 seconds. 
.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Southeast 4 feet at
7 seconds. 
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
3 feet. Wave Detail: Southeast 3 feet at 7 seconds. 
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. 
.THURSDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. Wave Detail: East 2 feet at 7 seconds. 
.FRIDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.SATURDAY...Southeast winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. 
.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. 

$$

Expires:202505202115;;835516
FZUS54 KCRP 200826
CWFCRP

Coastal Waters Forecast for Texas
National Weather Service Corpus Christi TX
326 AM CDT Tue May 20 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. 
 


GMZ250-202115-
Coastal waters from Baffin Bay to Port Aransas out 20 NM-
326 AM CDT Tue May 20 2025

.TODAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Southeast 5 feet at
7 seconds. A slight chance of showers and thunderstorms late this
morning. 
.TONIGHT...Southeast winds 5 to 10 knots, becoming east after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
Southeast 4 feet at 7 seconds. 
.WEDNESDAY...East winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: Southeast 3 feet at 7 seconds. 
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 7 seconds. 
.THURSDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: East 2 feet at 7 seconds. 
.THURSDAY NIGHT...Southeast winds around 10 knots. Seas around
2 feet. Wave Detail: East 2 feet at 7 seconds. 
.FRIDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Seas around 2 feet. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.SATURDAY...Southeast winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. 
.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to
4 feet, occasionally to 5 feet. 

Winds and seas higher in and near thunderstorms.

$$


Expires:202204060415;;857702
FZUS54 KCRP 051559 AAA
CWFCRP

Coastal Waters Forecast...UPDATED
National Weather Service Corpus Christi TX
1059 AM CDT Tue Apr 5 2022

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. 
 

GMZ230-060415-
Bays and Waterways from Baffin Bay to Port Aransas-
1059 AM CDT Tue Apr 5 2022

.REST OF TODAY...Southeast wind 5 to 10 knots. Bays smooth. 
.TONIGHT...Southeast wind around 10 knots shifting south after
midnight. Bays slightly choppy to occasionally choppy. A slight
chance of showers and thunderstorms in the evening. Patchy fog in
the evening. 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.
Patchy fog in the morning. 
.WEDNESDAY NIGHT...North wind 20 to 25 knots. Bays choppy to
rough. 
.THURSDAY...Northeast 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...North wind 10 to 15 knots shifting southeast in the
afternoon. Bays slightly choppy to occasionally choppy. 
.FRIDAY NIGHT...Southeast wind 15 to 20 knots becoming south
10 to 15 knots after midnight. Bays choppy. 
.SATURDAY...South wind 10 to 15 knots becoming southeast 15 to
20 knots in the afternoon. Bays choppy. 
.SATURDAY NIGHT...Southeast wind around 20 knots. Bays choppy to
occasionally rough. 

$$


Expires:202505202115;;835512
FZUS54 KCRP 200826
CWFCRP

Coastal Waters Forecast for Texas
National Weather Service Corpus Christi TX
326 AM CDT Tue May 20 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. 
 


GMZ200-202115-
326 AM CDT Tue May 20 2025

.SYNOPSIS FOR THE MIDDLE TEXAS COASTAL WATERS...

Onshore flow will reduce to light to gentle breezes (BF 2-3)
today. Tuesday night, a weak front will push offshore, briefly
resulting in gentle to moderate easterlies. 5-7 ft seas in the
offshore waters will reduce to 4-5 ft. In the nearshore waters
seas will reduce from near 5 ft to near 3 ft by Wednesday.

A gentle to moderate (BF 3-4) east to southeasterly wind will 
continue through Saturday. Winds will increase to a moderate to 
fresh breeze (BF 4-5) Saturday night through Sunday and persist 
into early next week. There is a low (10-30%) chance for showers 
and thunderstorms Thursday through early next week.

$$


Expires:202505202115;;836902
FZUS54 KBRO 200900
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
400 AM CDT Tue May 20 2025

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.


GMZ100-202115-
400 AM CDT Tue May 20 2025

.SYNOPSIS...An slightly enhanced pressure gradient between high 
pressure over the eastern Gulf and low pressure across both the 
Plains and the Sierra Madre will maintain moderate southeasterly
winds today. Conditions are expected to improve into Thursday, as
a weak front moves into the area and dissipates.

$$


Expires:202505202115;;836904
FZUS54 KBRO 200900
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
400 AM CDT Tue May 20 2025

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.


GMZ150-155-202115-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
400 AM CDT Tue May 20 2025

.TODAY...Southeast winds 10 to 15 knots, diminishing to 5 to
10 knots late this afternoon. Seas 4 to 5 feet. Wave Detail:
Southeast 5 feet at 7 seconds. 
.TONIGHT...Southeast winds 5 to 10 knots, becoming around 5 knots
after midnight, then becoming east early in the morning. Seas
3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. 
.WEDNESDAY...East winds 5 to 10 knots, becoming around 10 knots
late in the afternoon. Seas 3 to 4 feet. Wave Detail: Southeast
3 feet at 7 seconds. 
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet
at 7 seconds. A slight chance of showers and thunderstorms. 
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds. 
.THURSDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 6 seconds. 
.FRIDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. 
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
.SATURDAY...Southeast winds around 15 knots. Seas 3 to 4 feet. 
.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to
4 feet. 

Winds and seas higher in and near thunderstorms.

$$