GMZ300-221315-
731 PM CDT Tue Jul 21 2026
.Synopsis For High Island to the Matagorda Ship Channel Out 60 NM
including Galveston and Matagorda Bays.
High pressure over the western Gulf continues to bring light to
moderate west-southwest breezes over the waters with seas around 2
to 3 feet. This should continue through Wednesday before influence
from Tropical Storm Bertha potentially begins. There remains high
uncertainty in the forecast track and intensity of Bertha, though
the official forecast calls for weakening back to a depression late
in the week. Given this, significant impacts in our waters is not
expected, but some impact to small craft is possible if higher winds
and seas materialize, mainly offshore.
$$
GMZ335-221315- Galveston Bay- 731 PM CDT Tue Jul 21 2026 TONIGHT Southwest winds 10 to 15 knots, becoming west late. Bay waters slightly choppy. WEDNESDAY West winds 10 to 15 knots, becoming southwest around 10 knots in the afternoon. Bay waters slightly choppy, diminishing to smooth in the afternoon. WEDNESDAY NIGHT Southwest winds 5 to 10 knots, becoming northwest after midnight. Bay waters smooth, increasing to smooth to slightly choppy after midnight. THURSDAY North winds around 10 knots, becoming east in the afternoon. Bay waters smooth to slightly choppy, diminishing to smooth in the afternoon. A chance of showers and thunderstorms in the afternoon. THURSDAY NIGHT South winds around 15 knots with gusts up to 20 knots, increasing to 15 to 20 knots with gusts up to 30 knots after midnight. Bay waters slightly choppy, increasing to choppy after midnight. FRIDAY South winds 15 to 20 knots with gusts up to 30 knots. Bay waters choppy. FRIDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. SATURDAY South winds 10 to 15 knots. Bay waters slightly choppy. SATURDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. SUNDAY Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon. SUNDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. Winds and waves higher in and near thunderstorms. $$
GMZ335-221315- Galveston Bay- 731 PM CDT Tue Jul 21 2026 TONIGHT Southwest winds 10 to 15 knots, becoming west late. Bay waters slightly choppy. WEDNESDAY West winds 10 to 15 knots, becoming southwest around 10 knots in the afternoon. Bay waters slightly choppy, diminishing to smooth in the afternoon. WEDNESDAY NIGHT Southwest winds 5 to 10 knots, becoming northwest after midnight. Bay waters smooth, increasing to smooth to slightly choppy after midnight. THURSDAY North winds around 10 knots, becoming east in the afternoon. Bay waters smooth to slightly choppy, diminishing to smooth in the afternoon. A chance of showers and thunderstorms in the afternoon. THURSDAY NIGHT South winds around 15 knots with gusts up to 20 knots, increasing to 15 to 20 knots with gusts up to 30 knots after midnight. Bay waters slightly choppy, increasing to choppy after midnight. FRIDAY South winds 15 to 20 knots with gusts up to 30 knots. Bay waters choppy. FRIDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. SATURDAY South winds 10 to 15 knots. Bay waters slightly choppy. SATURDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. SUNDAY Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon. SUNDAY NIGHT South winds 10 to 15 knots. Bay waters slightly choppy. Winds and waves higher in and near thunderstorms. $$