National Weather Service Marine Forecast FZUS52 KTBW
FZUS52 KTBW 120619
CWFTBW
Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
219 AM 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.
GMZ800-121915
Synopsis for the coastal waters from Bonita Beach to Suwannee River
219 AM EDT Thu Mar 12 2026
SYNOPSIS
Marine conditions deteriorate this morning as showers and storms approach the northern waters then continue southeast. Winds and seas will increase through the day before diminishing on Friday. Shower and storm chances remain elevated through the weekend. A stronger cold front moves through on Monday, increasing winds and seas once again.
&&
GMZ830-121915
Tampa Bay waters
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots with gusts up to 20 knots,
becoming southwest with gusts up to 20 knots late. Bay and inland
waters a moderate chop. A chance of showers with a slight chance
of thunderstorms early this afternoon. Showers likely with a
slight chance of thunderstorms late.
TONIGHT
Northwest winds 10 to 15 knots, becoming northeast
with gusts up to 20 knots after midnight. Bay and inland waters a
moderate chop. A chance of showers with a slight chance of
thunderstorms in the evening.
FRIDAY
Northeast winds 10 to 15 knots with gusts up to
20 knots, becoming east 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 showers and thunderstorms.
SATURDAY
East winds 5 to 10 knots, becoming southeast in the
afternoon. Bay and inland waters light chop. A chance of showers
with a slight chance of thunderstorms.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. 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 in the
afternoon. Bay and inland waters light chop. A slight chance of
thunderstorms. A chance of showers in the morning, then showers
likely in the afternoon.
SUNDAY NIGHT
South winds around 10 knots. Bay and inland
waters light chop. A slight chance of thunderstorms. Showers
likely, mainly in the evening.
MONDAY
Southwest winds 10 to 15 knots. Bay and inland waters a
moderate chop. Showers likely with a slight chance of
thunderstorms.
Winds and waves higher in and near thunderstorms.
GMZ836-121915
Charlotte Harbor and Pine Island Sound
219 AM EDT Thu Mar 12 2026
TODAY
South winds 5 to 10 knots, becoming southwest 10 to
15 knots with gusts up to 20 knots this afternoon. Bay and inland
waters a moderate chop. A chance of showers with a slight chance
of thunderstorms late.
TONIGHT
West winds 5 to 10 knots, becoming northeast after
midnight. Bay and inland waters light chop. A chance of showers
with a slight chance of thunderstorms in the evening.
FRIDAY
Northeast winds around 10 knots, becoming east in the
afternoon. Bay and inland waters light chop. A slight chance of
thunderstorms. A slight chance of showers in the morning, then a
chance of showers in the afternoon.
FRIDAY NIGHT
North winds 5 to 10 knots, becoming east after
midnight. Bay and inland waters light chop. A slight chance of
thunderstorms. A chance of showers, mainly in the evening.
SATURDAY
East winds 5 to 10 knots, becoming south in the
afternoon. Bay and inland waters light chop. A slight chance of
thunderstorms. A chance of showers in the morning, then showers
likely in the afternoon.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Bay and inland
waters light chop. A slight chance of thunderstorms. Showers
likely, mainly in the evening.
SUNDAY
Southeast winds 5 to 10 knots. Bay and inland waters
light chop. A slight chance of thunderstorms. A chance of showers
in the morning, then showers likely in the afternoon.
SUNDAY NIGHT
South winds 5 to 10 knots. Bay and inland waters
light chop. A slight chance of thunderstorms. Showers likely,
mainly in the evening.
MONDAY
South winds 10 to 15 knots. Bay and inland waters a
moderate chop. Showers likely with a slight chance of
thunderstorms.
Winds and waves higher in and near thunderstorms.
GMZ856-121915
Coastal waters from Bonita Beach to Englewood FL out 20 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots with gusts up to 20 knots,
becoming southwest with gusts up to 20 knots late. Seas 1 foot or
less, then around 2 feet this afternoon. Wave Detail: South
1 foot at 4 seconds, becoming south 1 foot at 3 seconds. Bay and
inland waters a moderate chop. A chance of showers with a slight
chance of thunderstorms late.
TONIGHT
West winds 5 to 10 knots, becoming northeast 10 to
15 knots after midnight. Seas 1 foot or less, then around 2 feet
after midnight. Wave Detail: Southwest 1 foot at 4 seconds,
becoming east 1 foot at 4 seconds and west 1 foot at 4 seconds.
Bay and inland waters a moderate chop. A chance of showers with a
slight chance of thunderstorms in the evening.
FRIDAY
Northeast winds 10 to 15 knots, becoming southeast 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 3 seconds.
Bay and inland waters a moderate chop. A slight chance of showers
and thunderstorms.
FRIDAY NIGHT
Northwest winds around 5 knots, becoming east
after midnight. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet
at 7 seconds and south 1 foot at 3 seconds. Bay and inland waters
light chop. A slight chance of showers and thunderstorms.
SATURDAY
East winds 5 to 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 5 seconds. Bay and inland waters light chop.
A slight chance of thunderstorms. A chance of showers in the
morning, then showers likely 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 northwest
1 foot at 5 seconds. Bay and inland waters light chop. A slight
chance of thunderstorms. Showers likely, mainly in the evening.
SUNDAY
Southeast winds around 10 knots. Seas 1 foot or less.
Bay and inland waters light chop. Showers likely with a slight
chance of thunderstorms.
SUNDAY NIGHT
South winds around 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Bay and inland waters light
chop. A slight chance of thunderstorms. Showers likely, mainly in
the evening.
MONDAY
South winds 10 to 15 knots. Seas around 2 feet. Bay and
inland waters a moderate chop. Showers likely with a slight
chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
GMZ876-121915
Waters from Bonita Beach to Englewood FL out 20 to 60 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds around 10 knots, becoming southwest late.
Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A
slight chance of showers and thunderstorms early this afternoon.
A chance of showers with a slight chance of thunderstorms late.
TONIGHT
Northwest winds around 10 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: South 2 feet at
4 seconds and west 2 feet at 5 seconds. A chance of showers with
a slight chance of thunderstorms in the evening.
FRIDAY
Northeast winds 10 to 15 knots with gusts up to
20 knots, becoming east 5 to 10 knots in the afternoon. Seas 2 to
4 feet, occasionally to 5 feet. Wave Detail: Northwest 3 feet at
7 seconds and northeast 2 feet at 4 seconds. A slight chance of
showers and thunderstorms.
FRIDAY NIGHT
Northeast winds 5 to 10 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Northwest 3 feet at
7 seconds. A slight chance of thunderstorms. A slight chance of
showers in the evening, then a chance of showers after midnight.
SATURDAY
Southeast 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 with a slight chance of
thunderstorms.
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 with a slight chance of
thunderstorms.
SUNDAY
Southeast winds around 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Showers likely with a slight
chance of thunderstorms.
SUNDAY NIGHT
South winds around 10 knots. Seas around 2 feet.
A slight chance of thunderstorms. Showers likely, mainly in the
evening.
MONDAY
South winds around 10 knots. Seas around 2 feet.
Showers likely with a slight chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
GMZ853-121915
Coastal waters from Englewood to Tarpon Springs FL out 20 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots with gusts up to 20 knots,
becoming southwest with gusts up to 20 knots late. Seas around
2 feet. Wave Detail: South 2 feet at 4 seconds. Bay and inland
waters a moderate chop. A chance of showers with a slight chance
of thunderstorms early this afternoon. Showers likely with a
slight chance of thunderstorms late.
TONIGHT
North winds 10 to 15 knots, becoming northeast 15 to
20 knots after midnight. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: Southwest 2 feet at 4 seconds. Bay and
inland waters choppy. A chance of showers with a slight chance of
thunderstorms in the evening.
FRIDAY
Northeast winds 15 to 20 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: Northwest 3 feet at 7 seconds and northeast
2 feet at 4 seconds. Bay and inland waters choppy. A slight
chance of showers and thunderstorms in the afternoon.
FRIDAY NIGHT
North winds around 10 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: Northwest 2 feet
at 6 seconds and southeast 1 foot at 4 seconds. Bay and inland
waters light chop. A slight chance of showers and thunderstorms.
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 5 seconds, becoming southeast 1 foot at 3 seconds and
northwest 1 foot at 4 seconds. Bay and inland waters light chop.
A chance of showers with a slight chance of thunderstorms.
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 4 seconds. Bay and inland waters light chop. A chance of
showers with a slight chance of thunderstorms.
SUNDAY
Southeast winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Bay and inland waters a
moderate chop. A slight 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.
Bay and inland waters a moderate chop. A slight chance of
thunderstorms. Showers likely, mainly in the evening.
MONDAY
Southwest winds 10 to 15 knots. Seas around 2 feet. Bay
and inland waters a moderate chop. Showers likely with a slight
chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
GMZ873-121915
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots, becoming west with gusts up
to 20 knots late. Seas around 2 feet. Wave Detail: South 2 feet
at 5 seconds. A slight chance of showers this morning. A slight
chance of thunderstorms. Showers likely this afternoon.
TONIGHT
North winds 10 to 15 knots, becoming northeast 15 to
20 knots after midnight. Seas 2 to 3 feet, building to 3 to
5 feet, occasionally to 6 feet after midnight. Wave Detail: South
2 feet at 4 seconds and west 2 feet at 5 seconds, becoming
northeast 3 feet at 4 seconds and northwest 3 feet at 6 seconds.
A slight chance of showers and thunderstorms in the evening.
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
3 feet at 5 seconds and northwest 3 feet at 7 seconds. A slight
chance of showers and thunderstorms in the afternoon.
FRIDAY NIGHT
Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: North 2 feet at 6 seconds. A slight chance of
showers and thunderstorms.
SATURDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 4 seconds and northwest 1 foot at
6 seconds. A chance of showers with a slight chance of
thunderstorms.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 3 seconds. A chance of
showers with a slight chance of thunderstorms.
SUNDAY
Southeast winds around 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Showers likely with a slight
chance of thunderstorms.
SUNDAY NIGHT
South winds around 10 knots. Seas around 2 feet.
Showers likely with a slight chance of thunderstorms.
MONDAY
Southwest winds 10 to 15 knots. Seas around 2 feet.
Showers likely with a slight chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
GMZ850-121915
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots with gusts up to 20 knots,
becoming west with gusts up to 20 knots late. Seas around 2 feet.
Wave Detail: South 2 feet at 3 seconds and south 1 foot at
6 seconds. Bay and inland waters a moderate chop. Patchy fog this
morning. A chance of showers with a slight chance of
thunderstorms late this morning. Showers likely with a slight
chance of thunderstorms this afternoon.
TONIGHT
North winds 10 to 15 knots, becoming northeast 15 to
20 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 3 seconds and west 2 feet at 4 seconds. Bay and inland
waters choppy.
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, subsiding to 1 to 2 feet in the afternoon. Wave
Detail: Northeast 2 feet at 3 seconds and west 1 foot at
6 seconds, becoming northeast 2 feet at 3 seconds and northwest
1 foot at 6 seconds. Bay and inland waters a moderate chop.
FRIDAY NIGHT
North winds 5 to 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds and northwest 1 foot at 5 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 northwest 1 foot at
4 seconds. Bay and inland waters light chop. A slight chance of
thunderstorms. A slight chance of showers in the morning, then a
chance of showers 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
South winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop. A slight chance of thunderstorms. A
chance of showers in the morning, then showers likely in the
afternoon.
SUNDAY NIGHT
South winds around 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Bay and inland waters light
chop. Showers likely with a slight chance of thunderstorms.
MONDAY
Southwest winds 10 to 15 knots. Seas around 2 feet. Bay
and inland waters a moderate chop. Showers likely with a slight
chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
GMZ870-121915
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM
219 AM EDT Thu Mar 12 2026
TODAY
South winds 10 to 15 knots, becoming northwest late.
Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds. Patchy
fog this morning. A chance of showers this morning. A slight
chance of thunderstorms. Showers this afternoon.
TONIGHT
Northeast winds 15 to 20 knots with gusts up to
25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast 3 feet at 4 seconds and northwest 3 feet at 5 seconds.
FRIDAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: North 3 feet at 5 seconds.
FRIDAY NIGHT
North winds around 10 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: North 2 feet at
5 seconds.
SATURDAY
East winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: East 1 foot at 3 seconds and northwest 1 foot at
4 seconds. A chance of showers with a slight chance of
thunderstorms.
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 with a
slight chance of thunderstorms.
SUNDAY
Southeast winds around 10 knots. Seas 1 foot or less. A
slight chance of thunderstorms. A chance of showers in the
morning, then showers likely in the afternoon.
SUNDAY NIGHT
South winds around 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Showers likely with a slight
chance of thunderstorms.
MONDAY
Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Showers likely with a slight chance of thunderstorms.
Winds and seas higher in and near thunderstorms.
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