Offshore Marine Forecast
000
FZNT24 KNHC 202019
OFFNT4
Offshore Waters Forecast for the Gulf of America
NWS National Hurricane Center Miami, FL
419 PM EDT Thu Aug 20 2026
Offshore Waters Forecast for the Gulf of America
Seas given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.
GMZ001-210830-
Synopsis for the Gulf of America
419 PM EDT Thu Aug 20 2026
.SYNOPSIS...Relatively weak high pressure centered over the
central Gulf will prevail over the basin through early next week.
A weak pressure pattern will support mostly gentle to moderate
winds and slight to locally moderate seas across much of the
basin. A surface trough will generate fresh to locally strong
winds north and west of the Yucatan Peninsula in the early
evenings. These winds will spread westward away from the peninsula
at night as the trough migrates into the SW Gulf.
$$
GMZ040-210830-
NW Gulf of America including Stetson Bank-
419 PM EDT Thu Aug 20 2026
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft or less.
.FRI...S winds 10 to 15 kt. Seas 3 ft or less.
.FRI NIGHT...S winds 10 kt. Seas 3 ft or less.
.SAT...S to SW winds 10 kt in the morning, becoming variable less
than 5 kt. Seas 3 ft or less.
.SAT NIGHT...S winds 10 kt. Seas 3 ft or less.
.SUN...S to SW winds 10 kt in the morning, becoming variable less
than 5 kt. Seas 3 ft or less.
.SUN NIGHT...SE to S winds 10 kt. Seas 3 ft or less.
.MON...S winds 10 kt in the morning, becoming variable less than
5 kt. Seas 3 ft or less.
.MON NIGHT...SE to S winds 10 kt. Seas 3 ft or less.
.TUE...Variable winds less than 5 kt. Seas 3 ft or less.
.TUE NIGHT...Variable winds less than 5 kt, becoming S to SW
10 kt late. Seas 3 ft or less.
$$
GMZ041-210830-
SW Louisiana Offshore Waters including Flower Garden Bank Marine
Sanctuary-
419 PM EDT Thu Aug 20 2026
.TONIGHT...Variable winds less than 5 kt, becoming S to SW 10 kt
late. Seas 3 ft or less.
.FRI...S to SW winds 10 kt in the morning, becoming variable less
than 5 kt. Seas 3 ft or less.
.FRI NIGHT...SW winds 10 kt. Seas 3 ft or less.
.SAT...SW winds 10 kt in the morning, becoming variable less than
5 kt. Seas 3 ft or less.
.SAT NIGHT...Variable winds less than 5 kt, becoming SW to W
10 kt late. Seas 3 ft or less.
.SUN...Variable winds less than 5 kt. Seas 3 ft or less.
.SUN NIGHT...W of 92W, S winds 10 kt late. Variable
winds less than 5 kt in the evening. E of 92W, variable less than
5 kt. Seas 3 ft or less.
.MON...Variable winds less than 5 kt. Seas 3 ft or less.
.MON NIGHT...SE winds 10 kt, shifting to S to SW late.
Seas 3 ft or less.
.TUE...W of 92W, SW winds 10 kt in the morning, becoming variable
less than 5 kt. E of 92W, W to NW winds 10 kt. Seas 3 ft or less.
.TUE NIGHT...Variable winds less than 5 kt, becoming W 10 kt
late. Seas 3 ft or less.
$$
GMZ056-210830-
N Central Gulf of America Offshore Waters-
419 PM EDT Thu Aug 20 2026
.TONIGHT...Variable winds less than 5 kt, becoming SW to W 10 kt
late. Seas 3 ft or less.
.FRI...W of 89W, variable winds less than 5 kt. E of 89W,
variable winds less than 5 kt, becoming W 10 kt in the afternoon.
Seas 3 ft or less.
.FRI NIGHT...SW to W winds 10 kt. Seas 3 ft or less. Scattered
showers and isolated tstms.
.SAT...W winds 10 kt. Seas 3 ft or less. Scattered showers and
isolated tstms.
.SAT NIGHT...W winds 10 kt. Seas 3 ft or less.
.SUN...Variable winds less than 5 kt. Seas 3 ft or less.
.SUN NIGHT...Variable winds less than 5 kt. Seas 3 ft or less.
.MON...Variable winds less than 5 kt. Seas 3 ft or less.
.MON NIGHT...Variable winds less than 5 kt. Seas 3 ft or less.
.TUE...W of 89W, NW to N winds 10 kt. E of 89W, variable winds
less than 5 kt, becoming SW to W 10 kt in the afternoon. Seas
3 ft or less.
.TUE NIGHT...N winds 10 kt, shifting to E to SE late.
Seas 3 ft or less.
$$
GMZ057-210830-
NE Gulf of America N of 26N E of 87W-
419 PM EDT Thu Aug 20 2026
.TONIGHT...Variable winds less than 5 kt, becoming W 10 kt late.
Seas 3 ft or less. Scattered showers and isolated
tstms.
.FRI...W winds 10 kt. Seas 3 ft or less.
.FRI NIGHT...SW to W winds 10 kt. Seas 3 ft or less.
.SAT...SW to W winds 10 kt. Seas 3 ft or less.
.SAT NIGHT...SW to W winds 10 kt. Seas 3 ft or less.
.SUN...Variable winds less than 5 kt. Seas 3 ft or less.
.SUN NIGHT...Variable winds less than 5 kt. Seas 3 ft or less.
.MON...Variable winds less than 5 kt. Seas 3 ft or less.
.MON NIGHT...Variable winds less than 5 kt, becoming S 10 kt
late. Seas 3 ft or less.
.TUE...W of 85W, variable winds less than 5 kt, becoming SE 10 kt
in the afternoon. E of 85W, S to SW winds 10 kt. Seas 3 ft or
less.
.TUE NIGHT...S winds 10 kt. Seas 3 ft or less.
$$
GMZ058-210830-
W Central Gulf of America from 22N to 26N W of 94W-
419 PM EDT Thu Aug 20 2026
.TONIGHT...SE winds 10 to 15 kt. Seas 3 ft or less.
.FRI...SE winds 10 to 15 kt. Seas 3 ft or less.
.FRI NIGHT...SE winds 10 to 15 kt. Seas 3 ft or less.
.SAT...SE to S winds 10 kt. Seas 3 ft or less.
.SAT NIGHT...E to SE winds 10 kt. Seas 3 ft or less.
.SUN...SE winds 10 kt. Seas 3 ft or less.
.SUN NIGHT...E to SE winds 10 to 15 kt. Seas 3 ft or less.
.MON...SE winds 10 kt. Seas 3 ft or less.
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 ft or less.
.TUE...SE to S winds 10 kt W of 96W, and variable less than 5 kt
E of 96W. Seas 3 ft or less.
.TUE NIGHT...SE winds 10 kt. Seas 3 ft or less.
$$
GMZ045-210830-
W Central Gulf of America from 22N to 26N between 91W and 94W-
419 PM EDT Thu Aug 20 2026
.TONIGHT...E to SE winds 10 to 15 kt. Seas 3 ft or less.
.FRI...SE winds 10 to 15 kt. Seas 3 ft or less.
.FRI NIGHT...NE to E winds 10 to 15 kt S of 24N, and variable
less than 5 kt N of 24N. Seas 3 ft or less.
.SAT...S of 24N, E to SE winds 10 to 15 kt. N of 24N, SE winds
10 kt in the morning, becoming variable less than 5 kt. Seas 3 ft
or less.
.SAT NIGHT...NE to E winds 10 to 15 kt S of 24N, and variable
less than 5 kt N of 24N. Seas 3 ft or less.
.SUN...S of 24N, E to SE winds 10 kt. N of 24N, SE winds 10 kt in
the morning, becoming variable less than 5 kt. Seas 3 ft or less.
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 ft or less.
.MON...E to SE winds 10 kt S of 24N, and variable less than 5 kt
N of 24N. Seas 3 ft or less.
.MON NIGHT...E winds 10 kt in the evening, becoming variable less
than 5 kt. Seas 3 ft or less.
.TUE...S of 24N, E to SE winds 10 kt in the morning. Variable
winds less than 5 kt in the afternoon. N of 24N, variable winds
less than 5 kt in the morning. Seas 3 ft or less.
.TUE NIGHT...Variable winds less than 5 kt. Seas 3 ft or less.
$$
GMZ046-210830-
Central Gulf of America from 22N to 26N between 87W and 91W-
419 PM EDT Thu Aug 20 2026
.TONIGHT...E winds 10 to 15 kt S of 24N, and variable less than
5 kt N of 24N. Seas 3 ft or less.
.FRI...E winds 10 kt S of 24N, and variable less than 5 kt N of
24N. Seas 3 ft or less.
.FRI NIGHT...NE to E winds 10 to 15 kt S of 24N, and variable
less than 5 kt N of 24N. Seas 3 ft or less.
.SAT...SE winds 10 kt in the morning, becoming variable less than
5 kt. Seas 3 ft or less.
.SAT NIGHT...E winds 10 to 15 kt S of 24N, and variable less than
5 kt N of 24N. Seas 3 ft or less.
.SUN...S of 24N, E to SE winds 10 kt in the morning. Variable
winds less than 5 kt in the afternoon. N of 24N, variable winds
less than 5 kt in the morning. Seas 3 ft or less.
.SUN NIGHT...S of 24N, E winds 10 to 15 kt. N of 24N, variable
winds less than 5 kt, becoming E to SE 10 kt late. Seas
3 ft or less.
.MON...S of 24N, E to SE winds 10 kt in the morning, becoming
variable less than 5 kt. N of 24N, variable winds less than 5 kt.
Seas 3 ft or less in SE swell, subsiding to 3 ft or less in the
afternoon.
.MON NIGHT...NE to E winds 10 kt in the evening, becoming
variable less than 5 kt. Seas 3 ft or less.
.TUE...Variable winds less than 5 kt. Seas 3 ft or less.
.TUE NIGHT...S of 24N, N to NE winds 10 kt in the evening,
becoming variable less than 5 kt. N of 24N, variable winds less
than 5 kt, becoming SW 10 kt late. Seas 3 ft or less.
$$
GMZ047-210830-
SE Gulf of America from 22N to 26N E of 87W including Straits of
Florida-
419 PM EDT Thu Aug 20 2026
.TONIGHT...S of 24N, N to NE winds 10 kt, shifting to E late. N
of 24N, variable winds less than 5 kt. Seas 3 ft or
less.
.FRI...Variable winds less than 5 kt. Seas 3 ft or less.
.FRI NIGHT...NE to E winds 10 kt S of 24N, and variable less than
5 kt N of 24N. Seas 3 ft or less.
.SAT...Variable winds less than 5 kt. Seas 3 ft or less.
.SAT NIGHT...NE to E winds 10 kt S of 24N, and variable less than
5 kt N of 24N. Seas 3 ft or less.
.SUN...S of 24N, variable winds less than 5 kt, becoming NE 10 kt
in the afternoon. N of 24N, variable winds less than 5 kt. Seas
3 ft or less.
.SUN NIGHT...NE to E winds 10 kt. Seas 3 ft or less.
.MON...NE to E winds 10 kt S of 24N, and variable less than 5 kt
N of 24N. Seas 3 ft or less.
.MON NIGHT...E winds 10 kt. Seas 3 ft or less.
.TUE...NE to E winds 10 kt. Seas 3 ft or less.
.TUE NIGHT...E winds 10 kt. Seas 3 ft or less.
$$
GMZ048-210830-
SW Gulf of America S of 22N W of 94W-
419 PM EDT Thu Aug 20 2026
.TONIGHT...E winds 10 to 15 kt. Seas 3 ft or less.
.FRI...E winds 10 to 15 kt. Seas 2 to 4 ft.
.FRI NIGHT...NE to E winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT...S of 21N W of 95W, NE to E winds 10 kt in the morning,
becoming variable less than 5 kt. Elsewhere, E winds 10 kt. Seas
3 ft or less.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 ft or less.
.SUN...S of 21N W of 95W, SE to S winds 10 kt in the morning,
becoming variable less than 5 kt. Elsewhere, E winds 10 kt. Seas
3 ft or less.
.SUN NIGHT...NE to E winds 10 kt. Seas 3 ft or less.
.MON...S of 21N W of 95W, variable winds less than 5 kt, becoming
NE to E 10 kt in the afternoon. Elsewhere, E winds 10 kt. Seas
3 ft or less.
.MON NIGHT...E winds 10 kt. Seas 3 ft or less.
.TUE...E winds 10 kt. Seas 3 ft or less.
.TUE NIGHT...NE to E winds 10 kt. Seas 3 ft or less.
$$
GMZ049-210830-
Central Bay of Campeche-
419 PM EDT Thu Aug 20 2026
.TONIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft.
.FRI...E to SE winds 10 to 15 kt. Seas 2 to 4 ft.
.FRI NIGHT...NE winds 15 to 20 kt. Seas 2 to 4 ft.
.SAT...E to SE winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT NIGHT...NE winds 15 to 20 kt. Seas 2 to 4 ft.
.SUN...E to SE winds 10 to 15 kt. Seas 2 to 4 ft.
.SUN NIGHT...NE to E winds 10 to 15 kt. Seas 2 to 4 ft.
.MON...E winds 10 kt. Seas 2 to 4 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft.
.TUE...E winds 10 kt. Seas 2 to 4 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft.
$$
GMZ050-210830-
E Bay of Campeche including Campeche Bank-
419 PM EDT Thu Aug 20 2026
.TONIGHT...NE to E winds 20 to 25 kt. Seas 3 to 5 ft.
.FRI...E winds 10 to 15 kt. Seas 2 to 4 ft.
.FRI NIGHT...NE to E winds 15 to 20 kt. Seas 2 to 4 ft.
.SAT...E winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT NIGHT...W of 90W, N to NE winds 15 to 20 kt, shifting to E
late. E of 90W, NE winds 15 to 20 kt, shifting to E to
SE 10 kt late. Seas 2 to 4 ft.
.SUN...W of 90W, SE winds 10 to 15 kt, shifting to NE in the
afternoon. E of 90W, variable winds less than 5 kt, becoming NE
10 kt in the afternoon. Seas 3 ft or less.
.SUN NIGHT...NE winds 15 to 20 kt, shifting to E to SE 10 to
15 kt late. Seas 2 to 4 ft.
.MON...E to SE winds 10 kt, shifting to NE to E in the afternoon.
Seas 2 to 4 ft.
.MON NIGHT...NE to E winds 15 to 20 kt. Seas 2 to 4 ft.
.TUE...W of 90W, E to SE winds 10 kt in the morning, becoming
variable less than 5 kt. E of 90W, variable winds less than 5 kt,
becoming NE 10 kt in the afternoon. Seas 2 to 4 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft.
$$
Forecaster Christensen
