Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
956 FZUS54 KHGX 300533 CWFHGX Coastal Waters Forecast for Texas National Weather Service Houston/Galveston TX 1133 PM CST Sat Nov 29 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. GMZ300-301815- 1133 PM CST Sat Nov 29 2025 .Synopsis For High Island to the Matagorda Ship Channel Out 60 NM including Galveston and Matagorda Bays. Onshore winds will continue through the next few hours ahead of an approaching cold front. This front and associated showers and thunderstorms are expected to reach the bays late tonight, then push over the Gulf waters early Sunday morning. Isolated strong thunderstorms will be possible. Moderate to strong north winds (sustained 20 to 25 knots with gusts to 30 to 35 knots) can be expected in the wake of the front, and elevated seas of 5 to 8 ft. Small Craft Advisories are in effect late tonight through Sunday night for the Bays, and through Monday morning for the coastal waters. Another upper level disturbance will move through Sunday night and Monday bringing another round of rain and embedded thunderstorms. Additional Small Craft Advisories are possible Monday night into Tuesday morning as moderate to strong northeasterly winds develop behind this exiting system. $$ GMZ335-301815- Galveston Bay- 1133 PM CST Sat Nov 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CST SUNDAY THROUGH SUNDAY EVENING... .OVERNIGHT...Southeast winds around 10 knots, becoming northeast with gusts up to 25 knots late. Bay waters smooth to slightly choppy, increasing to slightly choppy late. Showers with thunderstorms likely. .SUNDAY...North winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers in the afternoon. .SUNDAY NIGHT...Northeast winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. A chance of showers after midnight. .MONDAY...Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers. .MONDAY NIGHT...North winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. Showers likely in the evening. .TUESDAY...North winds 15 to 20 knots with gusts up to 25 knots, diminishing to around 15 knots in the afternoon. Bay waters choppy, diminishing to slightly choppy in the afternoon. .TUESDAY NIGHT...Northeast winds around 10 knots. Bay waters smooth to slightly choppy. .WEDNESDAY...East winds 10 to 15 knots. Bay waters slightly choppy. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Bay waters slightly choppy. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. .THURSDAY...Northeast winds around 15 knots. Bay waters slightly choppy. Showers likely with a chance of thunderstorms. .THURSDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely. Winds and waves higher in and near thunderstorms. $$ GMZ330-301815- Matagorda Bay- 1133 PM CST Sat Nov 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CST SUNDAY THROUGH SUNDAY EVENING... .OVERNIGHT...South winds around 15 knots, becoming northwest 15 to 20 knots late. Bay waters slightly choppy, increasing to choppy late. Showers with a chance of thunderstorms. .SUNDAY...North winds 20 to 25 knots with gusts up to 30 knots. Bay waters rough. A chance of showers with a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. .SUNDAY NIGHT...North winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. A chance of showers and thunderstorms after midnight. .MONDAY...North winds 10 to 15 knots. Bay waters slightly choppy. Showers. .MONDAY NIGHT...North winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. A chance of showers in the evening. .TUESDAY...North winds 15 to 20 knots, diminishing to around 15 knots in the afternoon. Bay waters choppy, diminishing to slightly choppy in the afternoon. .TUESDAY NIGHT...Northeast winds around 10 knots. Bay waters smooth to slightly choppy. .WEDNESDAY...East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers in the afternoon. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely in the evening, then showers with a chance of thunderstorms after midnight. .THURSDAY...Northeast winds around 15 knots, increasing to 15 to 20 knots in the afternoon. Bay waters slightly choppy, increasing to choppy in the afternoon. A chance of thunderstorms. Showers likely. .THURSDAY NIGHT...North winds 15 to 20 knots. Bay waters choppy. Showers likely. Winds and waves higher in and near thunderstorms. $$ GMZ350-355-301815- Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM- 1133 PM CST Sat Nov 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CST SUNDAY THROUGH LATE SUNDAY NIGHT... .OVERNIGHT...South winds 10 to 15 knots with gusts up to 20 knots, becoming northwest 15 to 25 knots late. Seas 3 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Showers with thunderstorms likely. .SUNDAY...North winds 20 to 25 knots with gusts up to 30 knots. Seas 3 to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. Showers with a chance of thunderstorms in the morning, then a chance of showers in the afternoon. .SUNDAY NIGHT...Northeast winds 20 to 25 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 6 seconds and south 1 foot at 6 seconds. A chance of showers. .MONDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Showers. .MONDAY NIGHT...North winds around 20 knots, increasing to 20 to 25 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 4 feet at 6 seconds and south 1 foot at 6 seconds. Showers likely, mainly in the evening. .TUESDAY...North winds 20 to 25 knots, diminishing to around 20 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. .TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers in the afternoon. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of thunderstorms. Showers. .THURSDAY...Northeast winds 15 to 20 knots. Seas 3 to 4 feet. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet. Showers likely. Winds and seas higher in and near thunderstorms. $$ GMZ370-375-301815- 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- 1133 PM CST Sat Nov 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SUNDAY NIGHT... .OVERNIGHT...South winds around 15 knots with gusts up to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 4 feet at 6 seconds. Showers with a chance of thunderstorms late. .SUNDAY...Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 4 to 5 feet, building to 5 to 7 feet, occasionally to 9 feet in the afternoon. Wave Detail: Southeast 3 feet at 6 seconds. Showers with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. .SUNDAY NIGHT...Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 6 seconds and south 1 foot at 6 seconds. A chance of showers. .MONDAY...Northeast winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 6 seconds and south 1 foot at 6 seconds. A chance of thunderstorms in the morning. Showers. .MONDAY NIGHT...North winds around 20 knots, increasing to 20 to 25 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 4 feet at 5 seconds and south 1 foot at 6 seconds. Showers, mainly in the evening. .TUESDAY...North winds 20 to 25 knots, diminishing to around 20 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 7 seconds and south 1 foot at 5 seconds. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet. .WEDNESDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers in the afternoon. .WEDNESDAY NIGHT...Southeast winds around 15 knots. Seas 3 to 4 feet. A chance of thunderstorms. Showers. .THURSDAY...East winds 15 to 20 knots. Seas 4 to 5 feet. Showers with a chance of thunderstorms. .THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Showers, mainly in the evening. Winds and seas higher in and near thunderstorms. $$