135
FZNT31 KNHC 170149
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
949 PM EDT Thu Oct 16 2025

Marine Weather HF Voice Broadcast for the Tropical N Atlantic
from 07N to 19N W of 55W, the N Atlantic from 19N to
31N W of 55W including the Bahamas, and the Caribbean Sea.

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.

Synopsis for Caribbean Sea and Tropical N Atlantic from
07N to 19N W of 55W

.SYNOPSIS...A weak pressure gradient will support moderate or
lighter winds and slight to moderate seas over much of the basin
through Sat. A tropical wave will move across the tropical
Atlantic waters late this weekend with fresh to strong winds,
and rough seas accompanying the wave. The tropical wave is
forecast to enter the Caribbean waters by early next week,
bringing fresh winds and rough seas over the eastern Caribbean
waters.

NW Caribbean W of 85W

.OVERNIGHT...E winds less than 10 kt. Seas 2 ft or less.
.FRI...N winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SAT...SE winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...SE winds less than 10 kt. Seas 2 ft or less,
building to 3 ft after midnight.
.SUN...E winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.MON...NE winds less than 10 kt. Seas 2 ft or less.
.MON NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.TUE...NE winds less than 10 kt. Seas 2 ft or less.
.TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less.

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...N winds less than 10 kt. Seas 2 ft or less.
.FRI...E winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SUN...E winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 ft or less, building to 3 ft in the afternoon.
.SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT...Within 90 nm of coast of Colombia, E winds 10 kt.
Elsewhere, Variable winds less than 10 kt, becoming E less than
10 kt in the afternoon. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less, building to 3 ft after
midnight.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

SW Caribbean S of 11N

.OVERNIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SUN...Variable winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.MON...Variable winds less than 10 kt, becoming W less than
10 kt in the afternoon. Seas 2 ft or less, building to 3 ft in
the afternoon.
.MON NIGHT...W winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 ft.
.TUE...Variable winds less than 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...Variable winds less than 10 kt, becoming SW less
than 10 kt after midnight. Seas 3 to 4 ft.

Caribbean between 64W and 72W

.OVERNIGHT...SW winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 4 ft elsewhere.
.FRI...S winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere.
.FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 4 ft elsewhere.
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

Offshore Leeward Islands and adjacent ATLC waters from 15N to
19N W of 55W

.OVERNIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...S winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT...SE winds less than 10 kt. Seas 4 to 6 ft.
.SAT...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SUN...E winds 10 to 20 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.
.MON...E winds 10 to 20 kt. Seas 7 to 10 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.
.TUE...E winds 10 to 15 kt. Seas 6 to 9 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft.

Offshore Windward Islands and adjacent ATLC waters from 07N to
15N W of 55W

.OVERNIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN...E winds 10 to 20 kt. Seas 6 to 8 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.
.MON...E winds 10 to 20 kt. Seas 6 to 9 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.
.TUE...E winds 10 to 15 kt. Seas 6 to 8 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A series of cold fronts will move across the
forecast waters through Sat. High pressure will then build in the
wake of the fronts. Fresh to strong winds are expected across
the waters N of 25N through Sat before winds diminish. The fronts
will usher in northerly swell across the forecast waters. Rough
seas will cover the waters N of 25N through the end of the week,
before spreading southward to cover much of the waters E of 70W
by early Sun. Seas will then subside from west to east the
remainder of the weekend into early next week. Very rough seas
will move into the waters N of 27N and E of 70W from early Fri
through Sun morning.

ATLC waters from 27N to 31N W of 77W

.OVERNIGHT...NE winds 15 to 20 kt. Seas 7 to 9 ft.
.FRI...NE winds 10 to 15 kt. Seas 7 to 9 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft.
.SAT...NE winds 10 kt. Seas 5 to 7 ft.
.SAT NIGHT...E winds 10 kt. Seas 5 to 7 ft.
.SUN...S winds 10 kt. Seas 6 to 7 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft.
.MON...W winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 5 to 6 ft.
.MON NIGHT...Variable winds less than 10 kt. Seas 4 to 5 ft.
.TUE...Variable winds less than 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...Variable winds less than 10 kt, becoming SW less
than 10 kt after midnight. Seas 3 to 4 ft.

ATLC waters from 27N to 31N between 65W and 77W

.OVERNIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft.
.FRI...N winds 15 to 25 kt. Seas 8 to 13 ft.
.FRI NIGHT...N winds 10 to 20 kt W of 70W, and NW 15 to 25 kt
elsewhere. Seas 8 to 11 ft W of 70W, and 10 to 14 ft elsewhere.
.SAT...N winds 10 to 15 kt. Seas 8 to 11 ft W of 70W, and 11 to
16 ft elsewhere.
.SAT NIGHT...N winds 10 to 15 kt, shifting to NE after midnight.
Seas 9 to 14 ft.
.SUN...NE winds less than 10 kt in the morning, becoming
variable winds less than 10 kt. Seas 8 to 11 ft.
.SUN NIGHT...Variable winds less than 10 kt, becoming SE less
than 10 kt after midnight. Seas 6 to 9 ft.
.MON...S winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 6 to 8 ft.
.MON NIGHT...Variable winds less than 10 kt. Seas 5 to 6 ft.
.TUE...Variable winds less than 10 kt, becoming SE less than
10 kt in the afternoon. Seas 4 to 5 ft.
.TUE NIGHT...SE winds less than 10 kt. Seas 4 to 5 ft.

Bahamas N of 22N

.OVERNIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.

ATLC waters from 22N to 27N between 65W and the Bahamas

.OVERNIGHT...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.FRI...NW winds 10 to 15 kt. Seas 6 to 8 ft.
.FRI NIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft.
.SAT...N winds 10 to 15 kt. Seas 7 to 10 ft.
.SAT NIGHT...NE winds less than 10 kt. Seas 8 to 11 ft.
.SUN...E winds less than 10 kt. Seas 8 to 10 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 7 to 9 ft.
.MON...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 6 to 8 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 6 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.

ATLC waters S of 22N W of 65W

.OVERNIGHT...NW winds less than 10 kt. Seas 3 to 5 ft.
.FRI...NW winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...E winds less than 10 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.MON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

ATLC waters from 19N to 22N between 55W and 65W

.OVERNIGHT...SW winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI...SW winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI NIGHT...SW winds 10 to 20 kt. Seas 6 to 9 ft.
.SAT...SW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.SAT NIGHT...SE winds less than 10 kt. Seas 5 to 7 ft.
.SUN...E winds less than 10 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 8 to 10 ft.
.MON...E winds 10 to 15 kt. Seas 8 to 10 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 7 to 9 ft.
.TUE...E winds 10 to 15 kt. Seas 7 to 8 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft.