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.

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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.