023
FZNT31 KNHC 310805
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
405 AM EDT Sun Aug 31 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...An upper level trough north of the area and tropical
moisture combine to produce scattered showers and isolated
thunderstorms in the NW Caribbean. The unsettled weather
conditions will continue into Mon. A tropical wave moving across
the eastern Caribbean will produce some showers over the next
few days, reaching the central Caribbean today and the western
Caribbean Mon. Otherwise, Atlantic high pressure in combination
with low pressure over northern Colombia will support fresh to
strong trades along with moderate to locally rough seas across
much of the central Caribbean through this week. Later, moderate
to locally fresh easterly winds and moderate seas will prevail
across the central and eastern Caribbean through the workweek.

NW Caribbean W of 85W

.TODAY...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less.
.TUE...E winds 10 to 15 kt, shifting to SE in the afternoon.
Seas 2 ft or less.
.TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less.
.WED...SE winds less than 10 kt. Seas 2 ft or less.
.WED NIGHT...SE winds 10 to 15 kt. Seas 2 ft or less.
.THU...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less.
.THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight.

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.TONIGHT...E winds 10 to 15 kt S of 18N, and NE less than 10 kt
elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.MON...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.MON NIGHT...E winds 10 to 15 kt S of 18N, and Variable less
than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less
elsewhere.
.TUE...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 to 4 ft.
.THU...E winds 10 to 15 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

SW Caribbean S of 11N

.TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.TONIGHT...NE winds less than 10 kt. Seas 4 to 6 ft.
.MON...NE winds less than 10 kt, shifting to N in the afternoon.
Seas 4 to 6 ft.
.MON NIGHT...NW winds less than 10 kt. Seas 4 to 6 ft.
.TUE...NW winds less than 10 kt, shifting to W in the afternoon.
Seas 3 to 5 ft.
.TUE NIGHT...NW winds 10 to 15 kt, shifting to W after midnight.
Seas 3 to 5 ft.
.WED...SW winds less than 10 kt. Seas 3 to 4 ft.
.WED NIGHT...W winds less than 10 kt. Seas 3 to 4 ft.
.THU...SW winds less than 10 kt. Seas 3 to 4 ft.
.THU NIGHT...NW winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 ft.

Caribbean between 64W and 72W

.TODAY...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft.
.TONIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft.
.MON...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt
elsewhere. Seas 3 to 5 ft.
.MON NIGHT...NE winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 3 to 5 ft.
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.TODAY...E winds less than 10 kt. Seas 3 to 4 ft.
.TONIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 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 less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.TODAY...E winds less than 10 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 4 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 5 ft.
.WED...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A weak stationary front extends from a 1011 mb low
off NE Florida to near Palm Coast, Florida, with a surface
trough extending southward offshore Florida through the NW
Bahamas. Both features are leading to scattered showers and
isolated thunderstorms N of Cuba and W of 73W, which will
continue through early this week. The low pres will track NE to
E, dragging the front southward across much of Florida. Behind
the low, NE to E winds will increase to fresh to strong N of the
front and seas will build to locally rough, mainly N of 29N and W
of 75W Sun night into early Tue. Elsewhere, high pressure will
remain in control of the general weather pattern providing for a
gentle to moderate anticyclonic wind flow.

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

.TODAY...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.TONIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...NE winds 10 to 15 kt. Seas 6 to 8 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...NE winds 10 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.
.WED...E winds less than 10 kt. Seas 4 to 5 ft.
.WED NIGHT...SE winds 10 to 15 kt. Seas 4 to 5 ft.
.THU...S winds less than 10 kt, shifting to SW in the afternoon.
Seas 3 to 5 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...SW winds 10 to 15 kt. Seas 4 to 6 ft W of 70W, and 3 ft
elsewhere.
.TONIGHT...W of 70W, SW winds 10 to 15 kt. Elsewhere, SW winds
less than 10 kt, shifting to S after midnight. Seas 5 to 7 ft W
of 70W, and 3 to 4 ft elsewhere.
.MON...SW winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT...W of 70W, W winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Elsewhere, SW winds 10 to 15 kt. Seas
4 to 6 ft.
.TUE...SW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 4 to 6 ft.
.TUE NIGHT...S winds less than 10 kt. Seas 4 to 6 ft.
.WED...S winds less than 10 kt. Seas 4 to 5 ft.
.WED NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 ft.
.THU...S winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft.

Bahamas N of 22N

.TODAY...SW winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...W winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 2 ft or less.
.MON...SW winds less than 10 kt. Seas 2 ft or less.
.MON NIGHT...W winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 2 ft or less.
.TUE...SW winds less than 10 kt. Seas 2 ft or less.
.TUE NIGHT...SW winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 2 ft or less.
.WED...SW winds less than 10 kt. Seas 2 ft or less, building to
3 ft in the afternoon.
.WED NIGHT...S winds less than 10 kt. Seas 2 ft or less.
.THU...SW winds less than 10 kt. Seas 2 ft or less, building to
3 ft in the afternoon.
.THU NIGHT...S winds less than 10 kt. Seas 2 ft or less.

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

.TODAY...S winds less than 10 kt. Seas 3 ft.
.TONIGHT...S winds less than 10 kt. Seas 3 ft.
.MON...S winds less than 10 kt. Seas 3 ft.
.MON NIGHT...S winds less than 10 kt. Seas 3 to 4 ft.
.TUE...S winds less than 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft.
.WED...SE winds 10 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds 10 kt. Seas 3 to 4 ft.
.THU...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...SE winds 10 kt. Seas 3 to 5 ft.

ATLC waters S of 22N W of 65W

.TODAY...SE winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.TONIGHT...E winds less than 10 kt. Seas 2 ft or less.
.MON...SE winds less than 10 kt. Seas 2 ft or less.
.MON NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.TUE...SE winds less than 10 kt. Seas 2 ft or less.
.TUE NIGHT...SE winds less than 10 kt. Seas 2 ft or less,
building to 3 ft after midnight.
.WED...SE winds less than 10 kt. Seas 3 ft.
.WED NIGHT...SE winds less than 10 kt. Seas 3 ft.
.THU...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 ft.

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

.TODAY...E winds 10 kt. Seas 3 to 4 ft.
.TONIGHT...E winds 10 kt. Seas 3 to 4 ft.
.MON...SE winds 10 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds 10 kt. Seas 3 to 5 ft.
.TUE...E winds 10 kt. Seas 4 to 5 ft.
.TUE NIGHT...E winds 10 kt. Seas 4 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 5 ft.
.WED NIGHT...E winds 10 kt. Seas 4 ft.
.THU...E winds 10 kt. Seas 4 ft.
.THU NIGHT...E winds 10 kt. Seas 4 ft.