National Weather Service Marine Forecast FZUS52 KTBW
FZUS52 KTBW 130706
CWFTBW
Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
306 AM EDT Fri Mar 13 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.
GMZ800-132015
Synopsis for the coastal waters from Bonita Beach to Suwannee River
306 AM EDT Fri Mar 13 2026
SYNOPSIS
Marine conditions remain poor as winds and seas remain elevated. Winds will slowly begin to decrease throughout the day, followed by seas. Conditions once again deteriorate by the end of the weekend into early next week as a stronger cold front moves through. Likely reaching advisory levels following the cold front.
&&
GMZ830-132015
Tampa Bay waters
306 AM EDT Fri Mar 13 2026
SMALL CRAFT EXERCISE CAUTION
TODAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots late this morning, then becoming east 5 to 10 knots
early this afternoon, becoming north late. Bay and inland waters
choppy.
TONIGHT
North winds 5 to 10 knots, becoming northeast after
midnight. Bay and inland waters light chop. A slight chance of
showers and thunderstorms in the evening.
SATURDAY
East winds around 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
East 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, becoming south 10 to
15 knots 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. Bay and inland waters
a moderate chop. A slight chance of thunderstorms. Showers
likely, mainly in the evening.
MONDAY
South winds 10 to 15 knots, becoming southwest 15 to
20 knots in the afternoon. Bay and inland waters choppy. Showers
with a slight chance of thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming northwest
after midnight. Bay and inland waters choppy. A slight chance of
thunderstorms. Showers, mainly in the evening.
TUESDAY
North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Bay and inland waters choppy. A chance
of showers with a slight chance of thunderstorms in the morning.
Winds and waves higher in and near thunderstorms.
GMZ836-132015
Charlotte Harbor and Pine Island Sound
306 AM EDT Fri Mar 13 2026
TODAY
Northeast winds 10 to 15 knots, becoming east 5 to
10 knots early this afternoon, then becoming southwest late. Bay
and inland waters a moderate chop. A slight chance of showers and
thunderstorms late.
TONIGHT
Northwest winds 5 to 10 knots, becoming east after
midnight. Bay and inland waters light chop. A chance of showers
with a slight chance of thunderstorms 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
South winds 5 to 10 knots, becoming southeast
after midnight. Bay and inland waters light chop. A slight chance
of thunderstorms. Showers likely, mainly in the evening.
SUNDAY
Southeast winds 5 to 10 knots, becoming south 10 to
15 knots 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 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.
MONDAY NIGHT
Southwest winds 10 to 15 knots, becoming
northwest after midnight. Bay and inland waters a moderate chop.
Showers likely with a slight chance of thunderstorms.
TUESDAY
North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Bay and inland waters choppy. A slight
chance of thunderstorms. A chance of showers, mainly in the
morning.
Winds and waves higher in and near thunderstorms.
GMZ856-132015
Coastal waters from Bonita Beach to Englewood FL out 20 NM
306 AM EDT Fri Mar 13 2026
TODAY
Northeast winds 10 to 15 knots, becoming east 5 to
10 knots early this afternoon, then becoming west late. Seas 2 to
3 feet. Wave Detail: Northwest 3 feet at 6 seconds and northeast
2 feet at 3 seconds. Bay and inland waters a moderate chop. A
slight chance of showers and thunderstorms late.
TONIGHT
Northwest winds 5 to 10 knots, becoming northeast
after midnight. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet
at 7 seconds and southeast 1 foot at 4 seconds. Bay and inland
waters light chop. A slight chance of showers and thunderstorms
in the evening.
SATURDAY
East winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet in the morning, then 1 foot or
less. Wave Detail: East 1 foot at 2 seconds and north 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 with a slight chance of thunderstorms.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 2 seconds and northwest 1 foot
at 5 seconds. Bay and inland waters light chop. A chance of
showers with a slight chance of thunderstorms.
SUNDAY
Southeast winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southeast 1 foot at 3 seconds and west 1 foot at
4 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.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: South 1 foot at
4 seconds, becoming south 2 feet at 4 seconds. Bay and inland
waters a moderate chop. A slight chance of thunderstorms. Showers
likely, mainly in the evening.
MONDAY
South winds 10 to 15 knots. Seas 2 to 3 feet. Bay and
inland waters a moderate chop. Showers likely with a slight
chance of thunderstorms.
MONDAY NIGHT
Southwest 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. Showers
likely with a slight chance of thunderstorms.
TUESDAY
North winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Bay and inland waters choppy. A slight
chance of thunderstorms. A chance of showers, mainly in the
morning.
Winds and seas higher in and near thunderstorms.
GMZ876-132015
Waters from Bonita Beach to Englewood FL out 20 to 60 NM
306 AM EDT Fri Mar 13 2026
TODAY
Northeast winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots late. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: North 4 feet at 5 seconds
and northeast 2 feet at 3 seconds.
TONIGHT
North winds 5 to 10 knots, becoming northeast after
midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northwest 3 feet at 7 seconds. A slight chance of showers and
thunderstorms in the evening.
SATURDAY
East winds around 10 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: East 1 foot at
3 seconds and north 1 foot at 6 seconds. A chance of showers with
a slight chance of thunderstorms.
SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas around
2 feet in the evening, then 1 foot or less. Wave Detail:
Southeast 1 foot at 3 seconds and north 1 foot at 5 seconds,
becoming southeast 1 foot at 3 seconds and north 1 foot at
4 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. Wave Detail: Southeast
1 foot at 3 seconds and northwest 1 foot at 4 seconds, becoming
southeast 1 foot at 3 seconds. A slight chance of thunderstorms.
A chance of showers in the morning, then showers likely in the
afternoon.
SUNDAY NIGHT
Southeast winds 10 to 15 knots. Seas around
2 feet. Wave Detail: South 2 feet at 4 seconds. A slight chance
of thunderstorms. Showers likely, mainly in the evening.
MONDAY
South winds 10 to 15 knots. Seas 2 to 3 feet. Showers
likely with a slight chance of thunderstorms.
MONDAY NIGHT
West winds around 15 knots, becoming northwest
after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Showers
likely with a slight chance of thunderstorms.
TUESDAY
North winds around 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. A slight chance of thunderstorms. A
chance of showers, mainly in the morning.
Winds and seas higher in and near thunderstorms.
GMZ853-132015
Coastal waters from Englewood to Tarpon Springs FL out 20 NM
306 AM EDT Fri Mar 13 2026
SMALL CRAFT EXERCISE CAUTION
TODAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots late this morning and early afternoon, then becoming
northwest 5 to 10 knots late. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: North 3 feet at 5 seconds and northeast
2 feet at 3 seconds. Bay and inland waters choppy.
TONIGHT
North winds around 10 knots, becoming northeast after
midnight. Seas around 2 feet. Wave Detail: North 2 feet at
4 seconds and west 2 feet at 7 seconds. Bay and inland waters
light chop.
SATURDAY
East winds around 10 knots, becoming south in the
afternoon. Seas around 2 feet in the morning, then 1 foot or
less. Wave Detail: East 1 foot at 2 seconds and north 1 foot at
5 seconds, becoming southeast 1 foot at 2 seconds and north
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 northwest
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. Wave Detail: Southeast
1 foot at 3 seconds, becoming south 1 foot at 3 seconds. 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.
Wave Detail: South 2 feet at 4 seconds. Bay and inland waters a
moderate chop. A slight 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 slight chance of thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming northwest
20 to 25 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 rough. A slight 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. Seas 4 to 6 feet, occasionally to
8 feet. Bay and inland waters rough. A slight chance of showers
and thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
GMZ873-132015
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM
306 AM EDT Fri Mar 13 2026
SMALL CRAFT EXERCISE CAUTION
TODAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots early this afternoon, then becoming north late. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at
6 seconds and northeast 1 foot at 3 seconds.
TONIGHT
North winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: North 2 feet at 6 seconds and east 1 foot at 3 seconds.
SATURDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northwest 2 feet at 5 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 4 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. Wave Detail: Southeast
1 foot at 3 seconds, becoming southeast 2 feet at 3 seconds. 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.
Wave Detail: South 2 feet at 4 seconds. Showers likely with a
slight chance of thunderstorms.
MONDAY
South winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Showers with a slight chance of
thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming north after
midnight. Seas 3 to 5 feet, occasionally to 6 feet, building to
5 to 7 feet, occasionally to 9 feet after midnight. A slight
chance of thunderstorms. Showers likely, mainly in the evening.
TUESDAY
North winds around 20 knots. Seas 6 to 7 feet,
occasionally to 9 feet. A slight chance of showers and
thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
GMZ850-132015
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM
306 AM EDT Fri Mar 13 2026
SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING
TODAY
Northeast winds 15 to 20 knots, becoming east 10 to
15 knots late this morning, then becoming northeast 5 to 10 knots
early this afternoon, becoming northwest late. Seas 2 to 3 feet,
subsiding to 1 to 2 feet this afternoon. Wave Detail: Northeast
2 feet at 3 seconds and northeast 2 feet at 4 seconds, becoming
northeast 1 foot at 3 seconds and north 1 foot at 5 seconds. Bay
and inland waters choppy.
TONIGHT
North winds around 10 knots, becoming northeast after
midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
4 seconds and west 1 foot at 6 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 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 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 in the
afternoon. Seas 1 foot or less. Wave Detail: Southeast 1 foot at
2 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.
SUNDAY NIGHT
South winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: South 1 foot at
3 seconds, becoming south 2 feet at 3 seconds. Bay and inland
waters a moderate chop. Showers likely with a slight chance of
thunderstorms.
MONDAY
South winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Bay and inland waters choppy. Showers
with a slight chance of thunderstorms.
MONDAY NIGHT
West winds 15 to 20 knots, becoming northwest
after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Bay and
inland waters choppy. A slight chance of thunderstorms. Showers
likely, mainly in the evening.
TUESDAY
North winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Bay and inland waters choppy. A slight
chance of showers and thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
GMZ870-132015
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM
306 AM EDT Fri Mar 13 2026
SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING
TODAY
Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots early this afternoon, then becoming north late. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: North 3 feet at
5 seconds and northeast 2 feet at 3 seconds.
TONIGHT
North winds around 10 knots, becoming northeast after
midnight. Seas around 2 feet. Wave Detail: North 2 feet at
5 seconds and east 1 foot at 3 seconds.
SATURDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 1 foot at 3 seconds and north 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.
Wave Detail: Southeast 1 foot at 3 seconds. 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.
Wave Detail: South 2 feet at 4 seconds. Showers likely with a
slight chance of thunderstorms.
MONDAY
Southwest winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Showers with a slight chance of
thunderstorms.
MONDAY NIGHT
Northwest winds 15 to 20 knots, increasing to
20 to 25 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. A slight chance of thunderstorms. Showers likely, mainly
in the evening.
TUESDAY
North winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. A slight chance of showers and
thunderstorms in the morning.
Winds and seas higher in and near thunderstorms.
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