122  
FZUS54 KHGX 131121  
CWFHGX  
 
COASTAL WATERS FORECAST FOR TEXAS  
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX  
621 AM CDT WED AUG 13 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.  
 
GMZ300-140030-  
621 AM CDT WED AUG 13 2025  
 
.SYNOPSIS FOR HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL OUT 60 NM  
INCLUDING GALVESTON AND MATAGORDA BAYS.  
 
MAINLY LIGHT ONSHORE WINDS AND LOW SEAS ARE ANTICIPATED FOR THE  
NEXT SEVERAL DAYS. DAILY SEABREEZES WILL KICK WIND SPEEDS UP INTO  
THE 12 TO 18 KNOT RANGE IN THE AFTERNOONS AND EVENINGS NEAR THE  
COAST AND BAYS. MARINERS SHOULD EXPECT SCATTERED LATE NIGHT  
THROUGH AFTERNOON SHOWERS AND THUNDERSTORMS EACH DAY INTO  
THE WEEKEND.  
 

 
 
GMZ335-140030-  
GALVESTON BAY-  
621 AM CDT WED AUG 13 2025  
   
REST OF TODAY
 
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH THIS  
AFTERNOON. BAY WATERS SMOOTH. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
TONIGHT
 
SOUTHWEST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH. A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.    
THURSDAY
 
SOUTHWEST WINDS AROUND 10 KNOTS, BECOMING SOUTH 10 TO  
15 KNOTS IN THE AFTERNOON. BAY WATERS SMOOTH, INCREASING TO  
SLIGHTLY CHOPPY IN THE AFTERNOON. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 15 KNOTS, DIMINISHING TO  
AROUND 10 KNOTS AFTER MIDNIGHT. BAY WATERS SLIGHTLY CHOPPY,  
DIMINISHING TO SMOOTH AFTER MIDNIGHT.    
FRIDAY
 
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH. A CHANCE  
OF SHOWERS AND THUNDERSTORMS.    
FRIDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH.    
SATURDAY
 
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH. A  
CHANCE OF SHOWERS AND THUNDERSTORMS.    
SATURDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH.    
SUNDAY
 
WEST WINDS AROUND 5 KNOTS, BECOMING SOUTHEAST IN THE  
AFTERNOON. BAY WATERS SMOOTH. A CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON.    
SUNDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST  
AFTER MIDNIGHT. BAY WATERS SMOOTH.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
GMZ330-140030-  
MATAGORDA BAY-  
621 AM CDT WED AUG 13 2025  
   
REST OF TODAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH  
THIS AFTERNOON. BAY WATERS SMOOTH. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.   
TONIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. BAY WATERS SLIGHTLY  
CHOPPY.    
THURSDAY
 
SOUTHWEST WINDS AROUND 10 KNOTS, BECOMING SOUTH 10 TO  
15 KNOTS IN THE AFTERNOON. BAY WATERS SMOOTH, INCREASING TO  
SLIGHTLY CHOPPY IN THE AFTERNOON.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. BAY WATERS SLIGHTLY  
CHOPPY.    
FRIDAY
 
SOUTH WINDS AROUND 10 KNOTS, BECOMING SOUTHEAST 10 TO  
15 KNOTS WITH GUSTS UP TO 20 KNOTS IN THE AFTERNOON. BAY WATERS  
SMOOTH, INCREASING TO SLIGHTLY CHOPPY IN THE AFTERNOON. A CHANCE  
OF SHOWERS AND THUNDERSTORMS.    
FRIDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. BAY WATERS  
SLIGHTLY CHOPPY. A CHANCE OF SHOWERS AFTER MIDNIGHT.    
SATURDAY
 
SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH. A  
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS  
SMOOTH.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH.    
SUNDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
GMZ350-355-140030-  
COASTAL WATERS FROM FREEPORT TO MATAGORDA SHIP CHANNEL TX OUT  
20 NM-COASTAL WATERS FROM HIGH ISLAND TO FREEPORT TX OUT 20 NM-  
621 AM CDT WED AUG 13 2025  
   
REST OF TODAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH  
LATE. SEAS AROUND 2 FEET THIS MORNING, THEN 1 FOOT OR LESS. WAVE  
DETAIL: SOUTHWEST 1 FOOT AT 4 SECONDS, BECOMING SOUTH 1 FOOT AT  
4 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL LATE  
AFTERNOON, THEN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS  
LATE.    
TONIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET. WAVE  
DETAIL: SOUTHEAST 2 FEET AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS  
AND THUNDERSTORMS AFTER MIDNIGHT.    
THURSDAY
 
SOUTHWEST WINDS AROUND 10 KNOTS, BECOMING SOUTH 10 TO  
15 KNOTS IN THE AFTERNOON. SEAS AROUND 2 FEET. WAVE DETAIL: SOUTH  
2 FEET AT 5 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE  
MORNING.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.  
WAVE DETAIL: SOUTH 2 FEET AT 5 SECONDS.    
FRIDAY
 
SOUTH WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET. WAVE  
DETAIL: SOUTH 3 FEET AT 6 SECONDS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
FRIDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.  
WAVE DETAIL: SOUTH 3 FEET AT 6 SECONDS. A CHANCE OF SHOWERS AFTER  
MIDNIGHT.    
SATURDAY
 
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET. A  
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING.    
SATURDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.    
SUNDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.  
 
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
GMZ370-375-140030-  
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-  
621 AM CDT WED AUG 13 2025  
   
REST OF TODAY
 
WEST WINDS 5 TO 10 KNOTS, BECOMING NORTHWEST  
EARLY THIS AFTERNOON, THEN BECOMING SOUTH LATE. SEAS AROUND  
2 FEET. WAVE DETAIL: SOUTHWEST 1 FOOT AT 4 SECONDS. A CHANCE OF  
SHOWERS AND THUNDERSTORMS EARLY THIS MORNING, THEN A SLIGHT  
CHANCE OF SHOWERS AND THUNDERSTORMS LATE THIS MORNING AND EARLY  
AFTERNOON.    
TONIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET. WAVE  
DETAIL: SOUTHEAST 2 FEET AT 5 SECONDS.    
THURSDAY
 
SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET. WAVE  
DETAIL: SOUTH 2 FEET AT 5 SECONDS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.  
WAVE DETAIL: SOUTH 2 FEET AT 5 SECONDS.    
FRIDAY
 
SOUTHEAST WINDS AROUND 10 KNOTS. SEAS 2 TO 3 FEET. WAVE  
DETAIL: SOUTH 3 FEET AT 6 SECONDS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
FRIDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.  
WAVE DETAIL: SOUTH 3 FEET AT 6 SECONDS. A CHANCE OF SHOWERS AFTER  
MIDNIGHT.    
SATURDAY
 
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET. A  
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 2 TO  
3 FEET.    
SUNDAY
 
EAST WINDS AROUND 5 KNOTS. SEAS AROUND 2 FEET. A CHANCE  
OF SHOWERS AND THUNDERSTORMS IN THE MORNING.    
SUNDAY NIGHT
 
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND  
2 FEET.  
 
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
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