Marine Weather Net

South Mobile Bay Marine Forecast


REST OF TODAY

TROPICAL
STORM
CONDITIONS
EXPECTED

TONIGHT

S
WINDS
15 - 20
KNOTS

THURSDAY

S
WINDS
15 - 20
KNOTS

THURSDAY NIGHT

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ631 Forecast Issued: 1012 AM CDT Wed Jul 22 2026

TROPICAL STORM WARNING IN EFFECT
Rest Of Today...Tropical Storm Conditions Expected. East Winds 25 To 35 Knots, Becoming Southeast 30 To 35 Knots This Afternoon. Gusts Up To 50 Knots. Waves 2 To 4 Feet. Extremely Rough. Showers Likely With A Chance Of Thunderstorms.
Tonight...South Winds 15 To 20 Knots With Gusts Up To 30 Knots. Waves 2 To 3 Feet. Choppy. Showers Likely With A Chance Of Thunderstorms Early In The Evening, Then A Chance Of Showers With A Slight Chance Of Thunderstorms In The Late Evening And Overnight.
Thursday...South Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots In The Afternoon. Waves 2 To 3 Feet. Choppy. A Slight Chance Of Thunderstorms. A Chance Of Showers Until Late Afternoon, Then A Slight Chance Of Showers Late.
Thursday Night...South Winds 5 To 10 Knots. Waves 1 To 2 Feet. Light Chop. A Slight Chance Of Showers And Thunderstorms Early In The Evening.
Friday...Southwest Winds Around 5 Knots, Becoming South In The Afternoon. Waves 1 Foot Or Less. Light Chop. A Slight Chance Of Showers And Thunderstorms In The Afternoon.
Friday Night...Southwest Winds 5 To 10 Knots. Waves 1 Foot Or Less. Light Chop. A Slight Chance Of Showers And Thunderstorms Early In The Evening.
Saturday...West Winds 5 To 10 Knots. Waves 1 Foot Or Less. Light Chop. A Slight Chance Of Showers And Thunderstorms In The Morning.
Saturday Night...Southwest Winds 5 To 10 Knots. Waves 1 Foot Or Less. Light Chop.
Sunday...West Winds 5 To 10 Knots. Waves 1 Foot Or Less. Light Chop.
Sunday Night...West Winds 10 To 15 Knots. Waves 1 Foot Or Less. A Moderate Chop. Winds And Waves Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service Mobile AL
701am CDT Wednesday July 22 2026

Issued at 700am CDT Wednesday July 22 2026

Forecast overall remains on track. Tropical Storm Bertha has begun to weaken this morning due to increasingly northerly shear. However, we are still seeing gusts of 40-50 mph occur along the coast, especially in the passing bands of light to moderate showers. The wind gusts should gradually lessen as we go through the day and the center of Bertha moves west of our area. As the day progresses, we will coordinate with NHC on the appropriate time to cancel the Tropical Storm Warning. We are still likely to see a very breezy day along the coast through this afternoon with frequent gusts of 30-35 mph given the persistent onshore flow.

Area tide gages in Pensacola Bay, Mobile Bay, and MS Sound have reached 2 to 2.5 ft MHHW, which indicates there are likely areas of minor coastal flooding. This will persist over the next couple of hours through the high tide cycle. We are still likely to see another round of minor coastal flooding near high tide Thursday morning, especially in Mobile Bay with a persistent southerly flow continuing.

The High Surf Warning continues. Wave heigheights peaked around 14 ft at Buoy 42012 south of Orange Beach. Surf heigheights of 8-12 ft at the beaches will persist through early this evening before beginning to subside.

Slightly adjusted rain chances and temperatures today to match trends and the latest hi-res guidance. Heat indices will climb to the 100-107 degree range today, likely highest over interior SW AL and SE MS. Scattered to numerous showers will develop through the course of the day. A few thunderstorms are possible with peak heating. HRRR (High-Resolution Rapid Refresh) does show 2000-2500 J/kg CAPE this afternoon, but a warm layer aloft may preclude thunderstorm development. 34/JFB

Issued at 151am CDT Wednesday July 22 2026

The main story through the period is Tropical Storm Bertha with maximum sustained winds of 50 mph and is located about 80 miles south of Mobile. It is currently moving west at 6 mph parallel to the Gulf Coast with the center staying in our offshore waters. Current wave heigheights are 9.2 feet south of Orange Beach (Buoy 42012).

...THROUGH THURSDAY... Heat index values are just below the Heat Advisory threshold, but still very warm peaking at 107. The eastern half of our area will have more clouds and precipitation allowing for slightly lower heat index values in the upper 90s to low 100s. Anybody outdoors should drink plenty of water and take breaks in A/C when possible.

A Tropical Storm Warning is in effect for all land zones on the immediate coast and nearshore/offshore waters of Alabama and northwest Florida. Our main impacts with Bertha are gusty winds, increasing wave heights, and an increased rip current risk.

Inundation is possible with the strong onshore flow combined with high tide. A Coastal Flood Advisory in effect until 10 am Thursday for all area coastal areas and bays. Minor flooding of 1-3 feet above normally dry ground is expected especially for vulnerable low lying areas and typical trouble spots like Dauphin Island and Fort Pickens.

Widespread flooding issues are not expected with this tropical system with storm totals of 1-2" with localized areas receiving up to 4". The highest coverage of precipitation will be just along the immediate coast and mainly offshore. Our moisture content remains elevated with PWATs (Precipitable Waters) of 2.3-2.4" which introduces enhanced rain rates, but nothing more than very localized flooding is expected for the remainder of the event.

...FRIDAY THROUGH THE BEGINNING OF NEXT WEEK... After Bertha departs to the west, we are on the eastern periphery of a building upper ridge under generally northerly flow aloft through the end of the week and into the weekend. This brings rain chances to a more normal summertime pattern with daily chances for isolated to scattered showers and thunderstorms, especially along the sea breeze and resultant outflow boundaries. We switch into northwest flow aloft this weekend into the beginning of next week between the ridge to the west and the upper trough digging into the eastern US. This could bring organized convection down into our area, so this is something to watch through the weekend. Heat headlines could also be possible the beginning of next week as temperatures are projected to increase into the mid to upper 90s depending on the strength of the ridge.

..Beach Forecast
Dangerous and life-threatening beach conditions are expected through mid week. The rip current risk HIGH for our Alabama and northwest Florida beaches and will last through Thursday before dropping to MODERATE Friday through Saturday. Guidance shows surf peaking through Wednesday morning before slowly beginning to taper off. A High Surf Warning is in effect for surf heigheights up to 8-12 feet through 6 am Thursday for all Alabama and northwest Florida beaches.

SS/97

Marine
Issued at 151am CDT Wednesday July 22 2026

Tropical Storm Bertha is located approximately 80 miles south of Mobile with maximum sustained winds of 50 mph and moving west at 6 mph. Waves with this system peak around 10 to 15 feet through Wednesday evening before subsiding. Tropical storm force winds are impacting the Gulf waters and will decrease to moderate southerly winds by Thursday morning. After the system departs, light southwesterly to westerly winds begin Thursday night and continue through the weekend. SS/97

NOAA Mobile AL Office: Watches - Warnings - Advisories
AL...Coastal Flood Advisory until 10am CDT Thursday for ALZ263>266.

Tropical Storm Warning for ALZ263>266.

High Rip Current Risk through late Thursday night for ALZ265-266.

High Surf Warning until 6am CDT Thursday for ALZ265-266.

FL...Coastal Flood Advisory until 10am CDT Thursday for FLZ202-204- 206.

Tropical Storm Warning for FLZ202-204-206.

High Rip Current Risk through late Thursday night for FLZ202-204- 206.

High Surf Warning until 6am CDT Thursday for FLZ202-204-206.

MS...None. GM...Tropical Storm Warning for GMZ630>636-650-655-670-675.