FZUS54 KHGX 210511 CWFHGX Coastal Waters Forecast for Texas National Weather Service Houston/Galveston TX 1211 AM CDT Sun Jun 21 2026 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. GMZ300-211815- 1211 AM CDT Sun Jun 21 2026 .Synopsis For High Island to the Matagorda Ship Channel Out 60 NM including Galveston and Matagorda Bays. Scattered to numerous showers and thunderstorms are expected through early today, with rain chances decreasing this afternoon. Otherwise, light to moderate onshore flow will persist through the upcoming week with seas mostly between 3 to 6 ft. $$ GMZ335-211815- Galveston Bay- 1211 AM CDT Sun Jun 21 2026 .TODAY...South winds 15 to 20 knots. Bay waters choppy. A chance of showers and thunderstorms this morning, then a slight chance of showers and thunderstorms early this afternoon. .TONIGHT...South winds 15 to 20 knots. Bay waters choppy. .MONDAY...South winds 15 to 20 knots. Bay waters choppy. .MONDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. .TUESDAY...South winds 10 to 15 knots. Bay waters slightly choppy. .TUESDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. .WEDNESDAY...Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon. .WEDNESDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. .THURSDAY...South winds around 10 knots, increasing to 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. Winds and waves higher in and near thunderstorms. $$ GMZ330-211815- Matagorda Bay- 1211 AM CDT Sun Jun 21 2026 .TODAY...South winds 10 to 15 knots with gusts up to 20 knots. Bay waters slightly choppy. A chance of showers and thunderstorms this morning. .TONIGHT...South winds 15 to 20 knots. Bay waters choppy. .MONDAY...South winds 15 to 20 knots with gusts up to 25 knots. Bay waters choppy. .MONDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Bay waters slightly choppy. .TUESDAY...South winds 10 to 15 knots. Bay waters slightly choppy. .TUESDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. .WEDNESDAY...South winds 10 to 15 knots. Bay waters slightly choppy. .WEDNESDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. .THURSDAY...South winds 10 to 15 knots. Bay waters slightly choppy. .THURSDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly choppy. Winds and waves higher in and near thunderstorms. $$ GMZ350-355-211815- Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM- 1211 AM CDT Sun Jun 21 2026 .TODAY...South winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: South 5 feet at 7 seconds and south 3 feet at 4 seconds. A chance of showers and thunderstorms early this morning, then a slight chance of showers and thunderstorms late this morning. .TONIGHT...South winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: South 5 feet at 7 seconds. .MONDAY...South winds 15 to 20 knots, diminishing to around 15 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: South 5 feet at 7 seconds. .MONDAY NIGHT...South winds around 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds and southwest 2 feet at 4 seconds. .TUESDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 6 seconds. .TUESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 4 feet. Wave Detail: South 3 feet at 7 seconds. .WEDNESDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. .WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. .THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ GMZ370-375-211815- 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- 1211 AM CDT Sun Jun 21 2026 .TODAY...South winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. A chance of showers and thunderstorms early this morning, then a slight chance of showers and thunderstorms late this morning. .TONIGHT...South winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. .MONDAY...South winds 15 to 20 knots, diminishing to around 15 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: South 5 feet at 7 seconds. .MONDAY NIGHT...South winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. .TUESDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. .TUESDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 7 seconds. .WEDNESDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. .WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. .THURSDAY...South winds around 10 knots. Seas 2 to 3 feet. .THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$