Marine Weather Net

Galveston Bay Marine Forecast


THIS AFTERNOON

NE
WINDS
5 KNOTS

TONIGHT

SE
WINDS
5 - 10
KNOTS

WEDNESDAY

NE
WINDS
10 - 15
KNOTS

WEDNESDAY NIGHT

NE
WINDS
15
KNOTS

The Marine Weather Forecast In Detail:
GMZ335 Forecast Issued: 1141 AM CDT Tue Oct 07 2025

This Afternoon...Northeast Winds Around 5 Knots, Becoming Southeast Late. Bay Waters Smooth. A Slight Chance Of Showers.
Tonight...Southeast Winds 5 To 10 Knots, Becoming Northeast After Midnight. Bay Waters Smooth.
Wednesday...Northeast Winds 10 To 15 Knots. Bay Waters Slightly Choppy.
Wednesday Night...Northeast Winds Around 15 Knots, Increasing To 15 To 20 Knots After Midnight. Bay Waters Slightly Choppy, Increasing To Choppy After Midnight.
Thursday...Northeast Winds 15 To 20 Knots, Diminishing To Around 15 Knots In The Afternoon. Bay Waters Choppy, Diminishing To Slightly Choppy In The Afternoon.
Thursday Night...Northeast Winds 15 To 20 Knots. Bay Waters Choppy.
Friday...Northeast Winds 15 To 20 Knots, Diminishing To Around 15 Knots In The Afternoon. Bay Waters Choppy, Diminishing To Slightly Choppy In The Afternoon.
Friday Night...Northeast Winds 10 To 15 Knots. Bay Waters Slightly Choppy.
Saturday...East Winds 10 To 15 Knots. Bay Waters Slightly Choppy.
Saturday Night...Southeast Winds Around 10 Knots. Bay Waters Smooth To Slightly Choppy.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Houston/Galveston TX
1143am CDT Tuesday Oct 7 2025

...NewARINE... .KEY MESSAGES... Issued at 1135am CDT Monday Oct 6 2025

- Isolated showers and storms will be possible along the coast and in the Gulf waters through the next several days

- Hazardous marine conditions possible Wednesday night through Friday

- Dry conditions Friday into Saturday may lead to increased fire weather potential. Please exercise caution when working with open flames/equipment that can cause sparks, especially in dry spots.

Issued at 1041am CDT Tuesday Oct 7 2025

Other than a few isolated afternoon showers and storms along the coast over the next few days, we will remain rain-free through this upcoming week as an upper level ridge of high pressure builds over Texas. The rising heigheights and dry weather will lead to above normal temperatures with afternoon high temperatures rising into the low to mid-90s through Wednesday. Mild and muggy overnight conditions continue with lows generally in the low to mid-70s.

A weak boundary will push into the area from the northeast Thursday into Friday ushering in slightly cooler, but much drier conditions. Daytime temperatures will cool a few degrees (highs generally in the upper 80s to low 90s), but overnight temperatures will drop into the low to mid-60s for much of the area with spots in the Brazos Valley and Piney s down into the upper 50s.

The drier conditions but still warm afternoon temperatures will lead to afternoon relative humidity to drop into the 20-30% range for areas north of I-10. Winds will be light enough to limit fire danger somewhat, but the low RH values and dry vegetation may lead to fast fire starts.

Marine
Issued at 1041am CDT Tuesday Oct 7 2025

Light easterly to northeasterly winds and low seas will prevail through Wednesday. An increase in the northeasterly winds will begin Wednesday Night, up to around 15-25kt, and persist through Friday causing seas to build to 4-6ft. Small Craft Advisories are likely needed during this timeframe.

The increase in onshore winds and high astronomical tides will lead to higher than normal water-levels in the Bays and higher than normal tides along Gulf-facing beaches. Guidance currently has high tides up to around 3.5-4.0ft above Mean Low Low Water beginning Thursday.

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...None. GM...None.