National Weather Service Marine Forecast FZUS52 KTBW
FZUS52 KTBW 130042
CWFTBW
Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
842 PM EDT Thu Mar 12 2026
Gulf coastal waters from Bonita Beach to the mouth of the Suwannee River out to 60 NM.
Important notice to mariners...marine forecasts are issued at least four times a day. Boaters on extended trips should routinely monitor subsequent forecast issuances and updates for the latest marine weather information.
The wave heights are forecast as significant wave height which is the average of the highest one-third of the waves. The highest waves may rarely be twice the significant wave height. The winds and seas near thunderstorms may be higher than forecast.
GMZ800-131315
Synopsis for the coastal waters from Bonita Beach to Suwannee River
842 PM EDT Thu Mar 12 2026
SYNOPSIS
Small Craft Advisory conditions will develop tonight across the northern Gulf waters with Small Craft Exercise Cautionary levels elsewhere in the wake of a frontal passage. Northeasterly winds will then prevail on Friday with winds of 10-15 kts and seas of 2-4 ft. Winds and seas will decrease further at the start of the weekend but marine conditions start to deteriorate late in the weekend and into next week ahead of a strong cold front. As a result, headlines may eventually be needed early next week as strong northerly winds develop in the wake of this frontal boundary.
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GMZ830-131315
Tampa Bay waters
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
North winds 10 to 15 knots, becoming northeast
15 to 20 knots with gusts up to 25 knots. Bay and inland waters
choppy.
FRIDAY
Northeast winds 15 to 20 knots, diminishing to 5 to
10 knots in the afternoon. Bay and inland waters choppy.
FRIDAY NIGHT
Northeast winds 5 to 10 knots. Bay and inland
waters light chop.
SATURDAY
East winds 5 to 10 knots. Bay and inland waters light
chop. A chance of showers in the morning, then showers likely
with a chance of thunderstorms in the afternoon.
SATURDAY NIGHT
East winds 5 to 10 knots. Bay and inland waters
light chop. Showers likely with a chance of thunderstorms in the
evening, then a chance of showers with a slight chance of
thunderstorms after midnight.
SUNDAY
Southeast winds 5 to 10 knots, becoming south 10 to
15 knots with gusts up to 20 knots in the afternoon. Bay and
inland waters a moderate chop. A chance of showers in the
morning, then showers likely with a chance of thunderstorms in
the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Bay and inland waters
a moderate chop. Showers likely with a chance of thunderstorms in
the evening, then a chance of showers with a slight chance of
thunderstorms after midnight.
MONDAY
South winds 10 to 15 knots, becoming southwest 15 to
20 knots in the afternoon. Bay and inland waters choppy. Showers
with a chance of thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming north 20 to
25 knots after midnight. Bay and inland waters rough. A chance of
thunderstorms. Showers likely, mainly in the evening.
TUESDAY
North winds 20 to 25 knots, diminishing to 15 to
20 knots in the afternoon. Waves 2 to 3 feet. Bay and inland
waters rough. A chance of showers with a slight chance of
thunderstorms in the morning.
Winds and waves higher in and near thunderstorms.
GMZ836-131315
Charlotte Harbor and Pine Island Sound
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
West winds 5 to 10 knots, becoming northwest
late this evening, then becoming northeast around 15 knots late.
Bay and inland waters a moderate chop. A chance of showers early
this evening, then a slight chance of showers late this evening.
FRIDAY
Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Bay and inland waters a moderate chop.
A slight chance of showers and thunderstorms in the afternoon.
FRIDAY NIGHT
Northeast winds 5 to 10 knots. Bay and inland
waters light chop. A slight chance of thunderstorms in the
evening. A slight chance of showers.
SATURDAY
East winds 5 to 10 knots, becoming south in the
afternoon. Bay and inland waters light chop. A chance of showers
in the morning, then showers likely with a slight chance of
thunderstorms in the afternoon.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Bay and inland
waters light chop. Showers likely with a chance of thunderstorms
in the evening, then a chance of showers after midnight.
SUNDAY
Southeast winds 5 to 10 knots, becoming south 10 to
15 knots with gusts up to 20 knots in the afternoon. Bay and
inland waters a moderate chop. A chance of showers with a slight
chance of thunderstorms in the morning, then showers likely with
a chance of thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Bay and inland waters
a moderate chop. Showers likely with a chance of thunderstorms in
the evening, then a chance of showers with a slight chance of
thunderstorms after midnight.
MONDAY
South winds 10 to 15 knots. Bay and inland waters a
moderate chop. Showers likely. A chance of thunderstorms in the
afternoon.
MONDAY NIGHT
West winds 10 to 15 knots, becoming northwest
15 to 20 knots after midnight. Bay and inland waters choppy. A
chance of thunderstorms. Showers likely, mainly in the evening.
TUESDAY
North winds 20 to 25 knots, diminishing to 15 to
20 knots in the afternoon. Bay and inland waters rough. A slight
chance of thunderstorms. A chance of showers, mainly in the
morning.
Winds and waves higher in and near thunderstorms.
GMZ856-131315
Coastal waters from Bonita Beach to Englewood FL out 20 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
West winds 5 to 10 knots, becoming northwest
late this evening, then becoming northeast around 15 knots with
gusts up to 20 knots. Seas 1 foot or less, then around 2 feet.
Wave Detail: Southwest 1 foot at 4 seconds, becoming northeast 1
foot at 3 seconds and south 1 foot at 4 seconds. Bay and inland
waters a moderate chop. A chance of showers early this evening.
FRIDAY
Northeast winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots in the afternoon. Seas
2 to 3 feet. Wave Detail: Northwest 3 feet at 7 seconds and
northeast 2 feet at 4 seconds. Bay and inland waters a moderate
chop.
FRIDAY NIGHT
Northeast winds 5 to 10 knots, becoming east
after midnight. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet
at 7 seconds and northeast 1 foot at 4 seconds. Bay and inland
waters light chop. A slight chance of thunderstorms in the
evening. A slight chance of showers.
SATURDAY
East winds around 10 knots, becoming southeast in the
afternoon. Seas around 2 feet in the morning, then 1 foot or
less. Wave Detail: East 1 foot at 2 seconds and northwest 1 foot
at 6 seconds, becoming southeast 1 foot at 2 seconds and
northwest 1 foot at 6 seconds. Bay and inland waters light chop.
A chance of showers. A slight chance of thunderstorms in the
afternoon.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 2 seconds and northwest
1 foot at 5 seconds. Bay and inland waters light chop. A chance
of showers. A chance of thunderstorms, mainly in the evening.
SUNDAY
Southeast winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southeast
1 foot at 3 seconds, becoming south 2 feet at 4 seconds. Bay and
inland waters a moderate chop. A chance of showers with a slight
chance of thunderstorms in the morning, then showers likely with
a chance of thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Bay and inland waters a moderate chop. Showers likely with a
chance of thunderstorms in the evening, then a chance of showers
with a slight chance of thunderstorms after midnight.
MONDAY
South winds 10 to 15 knots. Seas around 2 feet. Bay and
inland waters a moderate chop. Showers likely. A chance of
thunderstorms in the afternoon.
MONDAY NIGHT
West winds 10 to 15 knots, becoming northwest
15 to 20 knots after midnight. Seas 2 to 4 feet, occasionally to
5 feet. Bay and inland waters choppy. A chance of thunderstorms.
Showers likely, mainly in the evening.
TUESDAY
North winds 20 to 25 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Bay and inland waters rough. A slight
chance of thunderstorms. A chance of showers, mainly in the
morning.
Winds and seas higher in and near thunderstorms.
GMZ876-131315
Waters from Bonita Beach to Englewood FL out 20 to 60 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
West winds around 10 knots, becoming northeast
with gusts up to 20 knots late. Seas 2 to 3 feet. Wave Detail:
West 2 feet at 5 seconds and northeast 1 foot at 3 seconds. A
slight chance of showers early this evening.
FRIDAY
Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northwest 4 feet at 7 seconds and north 2 feet at 5 seconds.
FRIDAY NIGHT
Northeast winds 5 to 10 knots, becoming east
after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: North 4 feet at 7 seconds and east 1 foot at 3 seconds. A
slight chance of showers in the evening, then a chance of showers
after midnight.
SATURDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 1 foot at 3 seconds and northwest 1 foot at
6 seconds. A chance of showers. A slight chance of thunderstorms
in the afternoon.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 3 seconds and north 1 foot
at 5 seconds. A chance of showers and thunderstorms.
SUNDAY
Southeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 4 seconds. A chance of
thunderstorms. A chance of showers in the morning, then showers
likely in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Showers likely with a chance of thunderstorms in the evening,
then a chance of showers with a slight chance of thunderstorms
after midnight.
MONDAY
South winds 10 to 15 knots. Seas around 2 feet. Showers
likely. A slight chance of thunderstorms in the morning, then a
chance of thunderstorms in the afternoon.
MONDAY NIGHT
West winds 10 to 15 knots, becoming northwest
15 to 20 knots after midnight. Seas 2 to 3 feet, building to 3 to
5 feet, occasionally to 6 feet after midnight. A chance of
thunderstorms. Showers likely, mainly in the evening.
TUESDAY
North winds 20 to 25 knots. Seas 5 to 7 feet,
occasionally to 9 feet, building to 7 to 9 feet, occasionally to
11 feet in the afternoon. A slight chance of thunderstorms. A
chance of showers, mainly in the morning.
Winds and seas higher in and near thunderstorms.
GMZ853-131315
Coastal waters from Englewood to Tarpon Springs FL out 20 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
Northwest winds 10 to 15 knots, becoming north
15 to 20 knots with gusts up to 25 knots late this evening and
early morning, then becoming northeast with gusts up to 25 knots
late. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
North 3 feet at 4 seconds and northwest 3 feet at 6 seconds. Bay
and inland waters choppy. A slight chance of showers early this
evening.
FRIDAY
Northeast winds 15 to 20 knots with gusts up to
25 knots, diminishing to 5 to 10 knots in the afternoon. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
3 feet at 5 seconds and northwest 3 feet at 7 seconds. Bay and
inland waters choppy.
FRIDAY NIGHT
North winds 10 to 15 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: Northeast 2 feet
at 4 seconds and northwest 2 feet at 7 seconds. Bay and inland
waters a moderate chop. A slight chance of showers.
SATURDAY
East winds around 10 knots, becoming southeast in the
afternoon. Seas around 2 feet in the morning, then 1 foot or
less. Wave Detail: Northeast 1 foot at 4 seconds and west 1 foot
at 6 seconds, becoming east 1 foot at 3 seconds and northwest
1 foot at 4 seconds. Bay and inland waters light chop. A chance
of showers. A slight chance of thunderstorms in the afternoon.
SATURDAY NIGHT
East winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 3 seconds and north 1 foot at
4 seconds. Bay and inland waters light chop. A chance of showers.
A chance of thunderstorms, mainly in the evening.
SUNDAY
Southeast winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southeast
1 foot at 3 seconds, becoming south 2 feet at 3 seconds. Bay and
inland waters a moderate chop. A chance of showers with a slight
chance of thunderstorms in the morning, then showers likely with
a chance of thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Bay and inland waters a moderate chop. A chance of thunderstorms.
Showers likely, mainly in the evening.
MONDAY
South winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Bay and inland waters choppy. Showers
with a chance of thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming north 25 to
30 knots after midnight. Seas 3 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet after
midnight. Bay and inland waters very rough. A chance of
thunderstorms. Showers likely, mainly in the evening.
TUESDAY
North winds 25 to 30 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Bay and inland waters very rough. A
chance of showers and thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
GMZ873-131315
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT EXERCISE CAUTION
REST OF TONIGHT
North winds 10 to 15 knots, increasing to 15
to 20 knots late this evening and early morning, then becoming
northeast late. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: Northwest 4 feet at 6 seconds and north 3 feet at 4
seconds. A slight chance of showers early this evening.
FRIDAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 4 feet at 4 seconds and northwest
4 feet at 7 seconds.
FRIDAY NIGHT
Northeast winds around 10 knots. Seas 2 to
3 feet. Wave Detail: Northwest 3 feet at 7 seconds and east
1 foot at 3 seconds. A slight chance of showers.
SATURDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northwest 2 feet at 6 seconds and east 1 foot at
3 seconds. A chance of showers. A slight chance of thunderstorms
in the afternoon.
SATURDAY NIGHT
East winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 3 seconds. A chance of showers. A
slight chance of thunderstorms in the evening, then a chance of
thunderstorms after midnight.
SUNDAY
Southeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 4 seconds. A chance of showers
with a slight chance of thunderstorms in the morning, then
showers likely with a chance of thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Showers likely with a chance of thunderstorms.
MONDAY
Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Showers with a chance of thunderstorms.
MONDAY NIGHT
Northwest winds 15 to 20 knots, becoming north
25 to 30 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. A chance of thunderstorms. Showers likely, mainly in the
evening.
TUESDAY
North winds 25 to 30 knots. Seas 7 to 9 feet,
occasionally to 11 feet. A chance of showers with a slight chance
of thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
GMZ850-131315
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY
REST OF TONIGHT
North winds 15 to 20 knots, becoming northeast
20 to 25 knots late this evening and overnight. Seas 2 to 3 feet.
Wave Detail: North 2 feet at 4 seconds and west 2 feet at 6
seconds. Bay and inland waters choppy.
FRIDAY
Northeast winds 15 to 20 knots, becoming north 5 to
10 knots in the afternoon. Seas 2 to 3 feet, subsiding to 1 to
2 feet in the afternoon. Wave Detail: Northeast 2 feet at
4 seconds and south 1 foot at 5 seconds, becoming northeast
1 foot at 4 seconds and west 1 foot at 6 seconds. Bay and inland
waters choppy.
FRIDAY NIGHT
North winds around 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
4 seconds. Bay and inland waters light chop.
SATURDAY
East winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: East 1 foot at 2 seconds and north 1 foot at 4 seconds.
Bay and inland waters light chop. A slight chance of showers in
the morning, then a chance of showers with a slight chance of
thunderstorms in the afternoon.
SATURDAY NIGHT
East winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 1 foot at 2 seconds. Bay and inland waters
light chop. A chance of showers with a slight chance of
thunderstorms.
SUNDAY
Southeast winds 5 to 10 knots, becoming south 10 to
15 knots in the afternoon. Seas 1 foot or less. Wave Detail:
Southeast 1 foot at 3 seconds. Bay and inland waters a moderate
chop. A chance of showers in the morning, then showers likely
with a chance of thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Bay and inland waters a moderate chop. Showers likely with a
chance of thunderstorms.
MONDAY
South winds 10 to 15 knots, becoming southwest 15 to
20 knots in the afternoon. Seas 2 to 3 feet. Bay and inland
waters choppy. Showers with a chance of thunderstorms.
MONDAY NIGHT
Northwest winds 15 to 20 knots, becoming north
20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to
5 feet. Bay and inland waters rough. A chance of showers. A
chance of thunderstorms, mainly in the evening.
TUESDAY
North winds 20 to 25 knots, diminishing to 15 to
20 knots in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Bay and inland waters rough. A slight chance of showers
in the morning.
Winds and seas higher in and near thunderstorms.
GMZ870-131315
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM
842 PM EDT Thu Mar 12 2026
SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY
REST OF TONIGHT
North winds 15 to 20 knots, becoming
northeast 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6
feet. Wave Detail:North 3 feet at 5 seconds and west 3 feet at 6
seconds.
FRIDAY
Northeast winds 15 to 20 knots with gusts up to
25 knots, diminishing to 10 to 15 knots in the afternoon. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast
4 feet at 5 seconds and west 2 feet at 6 seconds.
FRIDAY NIGHT
North winds around 10 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: Northeast 2 feet
at 5 seconds and west 1 foot at 6 seconds.
SATURDAY
East winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: East 1 foot at 3 seconds and north 1 foot at 4 seconds. A
slight chance of showers in the morning, then a chance of showers
with a slight chance of thunderstorms in the afternoon.
SATURDAY NIGHT
East winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 3 seconds. A slight chance of
thunderstorms in the evening. A chance of showers.
SUNDAY
Southeast winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southeast
1 foot at 3 seconds, becoming south 2 feet at 3 seconds. A chance
of showers in the morning, then showers likely with a chance of
thunderstorms in the afternoon.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.
Showers likely with a chance of thunderstorms.
MONDAY
Southwest winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Showers with a chance of thunderstorms.
MONDAY NIGHT
Northwest winds 20 to 25 knots, becoming north
25 to 30 knots after midnight. Seas 5 to 8 feet, occasionally to
10 feet. A chance of showers with a slight chance of
thunderstorms.
TUESDAY
North winds 25 to 30 knots, diminishing to 20 to
25 knots in the afternoon. Seas 5 to 8 feet, occasionally to
10 feet. A slight chance of showers in the morning.
Winds and seas higher in and near thunderstorms.
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