Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
189 FZUS54 KHGX 240502 CWFHGX Coastal Waters Forecast for Texas National Weather Service Houston/Galveston TX 1102 PM CST Sun Nov 23 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. GMZ300-241745- 1102 PM CST Sun Nov 23 2025 .Synopsis For High Island to the Matagorda Ship Channel Out 60 NM including Galveston and Matagorda Bays. Look for increasing southeast and building seas overnight and into Monday. The next weather system will move into Southeast Texas later today, with the tail end of some showers and isolated storms toward the coast Monday night. Can not rule out an isolated strong storm in the Galveston Bay area between about 10pm and 5am. Rain chances start to taper off Tuesday depending on when a weak cold front moves off the coast. A secondary, stronger push of cool dry air will move into the waters late Tuesday night and early Wednesday morning. North winds should increase to 20 to 25 knots as this occurs along with building seas offshore. Small Craft Advisories will be required. Onshore winds resume and increase later in the week. $$ GMZ335-241745- Galveston Bay- 1102 PM CST Sun Nov 23 2025 .REST OF TONIGHT...Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers late. .MONDAY...South winds 10 to 15 knots with gusts up to 20 knots. Bay waters slightly choppy. A chance of showers. Isolated thunderstorms in the afternoon. .MONDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Bay waters slightly choppy. A chance of showers and isolated storms. .TUESDAY...Southwest winds 5 to 10 knots, becoming north. Bay waters smooth. A chance of showers in the morning. .TUESDAY NIGHT...North winds around 10 knots, increasing to 20 knots after midnight. Bay waters smooth, increasing to choppy after midnight. .WEDNESDAY...North winds 20 to 25 knots. Bay waters choppy to rough. .WEDNESDAY NIGHT...Northeast winds around 15 knots with gusts up to 20 knots. Bay waters slightly choppy. .THURSDAY...Northeast winds 10 to 15 knots. Bay waters slightly choppy. .THURSDAY NIGHT...East winds 10 to 15 knots. Bay waters slightly choppy. .FRIDAY...East winds 10 to 15 knots. Bay waters slightly choppy. .FRIDAY NIGHT...Southeast winds 15 to 20 knots. Bay waters choppy. Winds and waves higher in and near thunderstorms. $$ GMZ330-241745- Matagorda Bay- 1102 PM CST Sun Nov 23 2025 .REST OF TONIGHT...Southeast winds around 15 knots. Bay waters slightly choppy to choppy. .MONDAY...South winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. A slight chance of showers. Isolated thunderstorms in the afternoon. .MONDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Bay waters slightly choppy. A chance of showers. .TUESDAY...West winds 5 to 10 knots, becoming north. Bay waters smooth. .TUESDAY NIGHT...Northeast winds around 10 knots, increasing to 20 knots after midnight. Bay waters smooth, increasing to choppy after midnight. .WEDNESDAY...North winds 20 to 25 knots. Bay waters choppy. .WEDNESDAY NIGHT...Northeast winds around 15 knots with gusts up to 20 knots. Bay waters slightly choppy. .THURSDAY...Northeast winds 10 to 15 knots. Bay waters slightly choppy. .THURSDAY NIGHT...East winds 10 to 15 knots. Bay waters slightly choppy. .FRIDAY...East winds around 15 knots, becoming southeast 15 to 20 knots in the afternoon. Bay waters slightly choppy, increasing to choppy in the afternoon. .FRIDAY NIGHT...Southeast winds 15 to 20 knots. Bay waters choppy. A chance of showers after midnight. Winds and waves higher in and near thunderstorms. $$ GMZ350-355-241745- Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM- 1102 PM CST Sun Nov 23 2025 .REST OF TONIGHT...Southeast winds near 15 knots with gusts up to 20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of showers late. .MONDAY...South winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: South 4 feet at 5 seconds. A slight chance of showers. Isolated thunderstorms in the afternoon. .MONDAY NIGHT...South winds 15 to 20 knots, becoming southwest around 15 knots after midnight. Seas 3 to 4 feet. Wave Detail: South 4 feet at 6 seconds. A chance of showers in the evening, then showers likely after midnight. .TUESDAY...Southwest winds 10 to 15 knots, becoming north around 10 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers in the morning. .TUESDAY NIGHT...Northeast winds around 15 knots, becoming north 20 to 25 knots after midnight. Seas 2 to 3 feet, building to 3 to 5 feet after midnight. Wave Detail: South 2 feet at 6 seconds, becoming northeast 2 feet at 2 seconds and south 2 feet at 6 seconds. .WEDNESDAY...North winds 20 to 25 knots, becoming northeast around 20 knots in the afternoon. Seas 4 to 5 feet, occasionally to 8 feet. Wave Detail: Northeast 3 feet at 4 seconds and southeast 2 feet at 6 seconds. .WEDNESDAY NIGHT...Northeast winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet. .THURSDAY...Northeast winds 15 to 20 knots. Seas 4 to 5 feet. .THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet. .FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. .FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. A chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$ GMZ370-375-241745- 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- 1102 PM CST Sun Nov 23 2025 .REST OF TONIGHT...Southeast winds 15 knots with gusts up to 20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of showers late. .MONDAY...South winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds. .MONDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: South 4 feet at 6 seconds. A chance of showers after midnight. .TUESDAY...Southwest winds 10 to 15 knots, becoming north around 10 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: South 4 feet at 6 seconds. A chance of showers. .TUESDAY NIGHT...Northeast winds around 15 knots, increasing to 20 to 25 knots after midnight. Seas 3 to 5 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers after midnight. .WEDNESDAY...Northeast winds 20 to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 5 seconds and southwest 1 foot at 5 seconds. .WEDNESDAY NIGHT...Northeast winds around 20 knots with gusts up to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. .THURSDAY...Northeast winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. .THURSDAY NIGHT...East winds around 15 knots. Seas 5 to 6 feet, occasionally to 8 feet. .FRIDAY...East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. .FRIDAY NIGHT...Southeast winds around 20 knots. Seas building to 6 to 8 feet, occasionally to 9 feet. A chance of showers after midnight. $$