488
FZUS52 KTBW 200700
CWFTBW

Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
300 AM EDT Wed Aug 20 2025

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.

GMZ800-201500-
Synopsis for the coastal waters from Bonita Beach to Suwannee River-
300 AM EDT Wed Aug 20 2025

.SYNOPSIS...

Winds will become northwesterly today then shift to west to
southwest for the remainder of the week into the weekend. Slightly
drier air will limit rain chances today, but during Thursday
through Sunday moisture will return leading to increased shower
and thunderstorm activity along with potential impacts.

&&

$$

GMZ830-201500-
Tampa Bay waters-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest early this
afternoon, then increasing to 10 to 15 knots late. Bay and inland
waters a moderate chop. Isolated showers and thunderstorms this
afternoon.
.TONIGHT...Northwest winds 10 to 15 knots, becoming west 5 to
10 knots after midnight. Bay and inland waters a moderate chop.
.THURSDAY...West winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Bay and inland
waters light chop. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered showers and thunderstorms in the morning, then numerous
showers and thunderstorms in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay and inland
waters light chop. Numerous showers and thunderstorms, mainly in
the evening.
.SATURDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Numerous showers and scattered thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered thunderstorms. Numerous showers, mainly in
the evening.
.SUNDAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Bay and inland waters a moderate chop. Numerous
showers and scattered thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ836-201500-
Charlotte Harbor and Pine Island Sound-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest early this
afternoon, then becoming west 10 to 15 knots with gusts up to
20 knots late. Bay and inland waters a moderate chop. Scattered
showers and thunderstorms this afternoon.
.TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots after midnight. Bay and inland
waters a moderate chop. Scattered showers and thunderstorms,
mainly in the evening.
.THURSDAY...West winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots in the afternoon. Bay and
inland waters a moderate chop. Scattered showers and
thunderstorms.
.THURSDAY NIGHT...West winds 10 to 15 knots, becoming southwest
5 to 10 knots after midnight. Bay and inland waters a moderate
chop. Scattered showers and thunderstorms, mainly in the evening.
.FRIDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots with gusts up to 20 knots in the afternoon. Bay and
inland waters a moderate chop. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.SATURDAY...West winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered thunderstorms. Scattered showers in the morning, then
numerous showers in the afternoon.
.SATURDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Numerous showers and scattered thunderstorms in the
evening, then isolated showers and thunderstorms after midnight.
.SUNDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ856-201500-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest early this
afternoon, then increasing to 10 to 15 knots with gusts up to
20 knots late. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Bay and inland waters a moderate chop. Isolated
showers and thunderstorms early this morning, then scattered
showers and thunderstorms late this morning and afternoon.
.TONIGHT...West winds 10 to 15 knots, decreasing to around 10
knots in the late evening and overnight. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds. Bay and inland waters
a moderate chop. Isolated showers and thunderstorms.
.THURSDAY...West winds around 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Bay and inland waters light
chop. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 3 seconds. Bay and inland
waters light chop. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.FRIDAY NIGHT...West winds around 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.SATURDAY...West winds around 10 knots. Seas 1 foot or less. Bay
and inland waters light chop. Scattered showers and
thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Bay and inland waters light chop. Scattered showers and
thunderstorms.
.SUNDAY...West winds around 10 knots. Seas 1 foot or less. Bay
and inland waters light chop. Scattered showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ876-201500-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.TONIGHT...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northwest 1 foot at 3 seconds. Isolated showers and
thunderstorms in the evening, then scattered showers and
thunderstorms after midnight.
.THURSDAY...West winds around 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Numerous showers and scattered
thunderstorms.
.THURSDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 3 seconds. Scattered showers
and thunderstorms.
.FRIDAY...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 4 seconds. Scattered showers
and thunderstorms.
.SATURDAY...West winds around 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.SUNDAY...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ853-201500-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest 10 to
15 knots this afternoon. Seas 1 foot or less. Wave Detail: North
1 foot at 3 seconds. Bay and inland waters a moderate chop.
Isolated showers and thunderstorms early this morning. Scattered
showers and thunderstorms late this morning and early afternoon,
then isolated showers and thunderstorms late.
.TONIGHT...Northwest winds 10 to 15 knots, decreasing to around
10 knots in the late evening and overnight. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Bay and inland waters a
moderate chop. Isolated showers and thunderstorms.
.THURSDAY...West winds around 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Bay and inland waters light
chop. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland
waters light chop. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southwest
1 foot at 3 seconds, becoming west 1 foot at 3 seconds. Bay and
inland waters a moderate chop. Scattered showers and
thunderstorms in the morning, then numerous showers and
thunderstorms in the afternoon.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: West 1 foot at 4 seconds. Bay and inland
waters light chop. Numerous showers and thunderstorms, mainly in
the evening.
.SATURDAY...West winds 10 to 15 knots. Seas around 2 feet. Bay
and inland waters a moderate chop. Numerous showers and scattered
thunderstorms.
.SATURDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Bay and inland waters light chop. Scattered thunderstorms.
Numerous showers, mainly in the evening.
.SUNDAY...West winds 10 to 15 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Bay and inland waters a moderate
chop. Scattered thunderstorms. Scattered showers in the morning,
then numerous showers in the afternoon.

Winds and seas higher in and near thunderstorms.

$$

GMZ873-201500-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest late. Seas
1 foot or less. Wave Detail: North 1 foot at 3 seconds. Scattered
showers and thunderstorms.
.TONIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Isolated showers and
thunderstorms.
.THURSDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northwest 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.THURSDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds. Scattered
showers and thunderstorms.
.FRIDAY...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Numerous
thunderstorms. Scattered showers in the morning, then numerous
showers in the afternoon.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less, then around 2 feet after midnight. Wave Detail: Southwest
1 foot at 4 seconds. Numerous showers and thunderstorms, mainly
in the evening.
.SATURDAY...West winds around 10 knots. Seas around 2 feet.
Numerous showers and scattered thunderstorms.
.SATURDAY NIGHT...West winds around 10 knots. Seas around 2 feet
in the evening, then 1 foot or less. Scattered thunderstorms.
Numerous showers, mainly in the evening.
.SUNDAY...West winds 10 to 15 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Numerous showers and scattered
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ850-201500-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest around
10 knots this afternoon. Seas 1 foot or less. Wave Detail: North
1 foot at 2 seconds. Bay and inland waters light chop. Isolated
showers and thunderstorms early this morning. Isolated showers and
thunderstorms this afternoon.
.TONIGHT...Northwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds. Bay and inland waters
light chop. Isolated showers and thunderstorms in the evening,
then scattered showers and thunderstorms after midnight.
.THURSDAY...West winds 5 to 10 knots, increasing to around
10 knots in the afternoon. Seas 1 foot or less. Wave Detail:
Northwest 1 foot at 3 seconds. Bay and inland waters light chop.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots, increasing to around
10 knots in the afternoon. Seas 1 foot or less. Wave Detail: West
1 foot at 3 seconds. Bay and inland waters light chop. Numerous
thunderstorms. Widespread showers.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland
waters light chop. Numerous showers. Numerous thunderstorms,
mainly in the evening.
.SATURDAY...West winds 5 to 10 knots, increasing to around
10 knots in the afternoon. Seas 1 foot or less. Bay and inland
waters light chop. Widespread showers and scattered thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Bay and inland waters light chop. Scattered thunderstorms.
Numerous showers, mainly in the evening.
.SUNDAY...West winds 5 to 10 knots, increasing to around 10 knots
in the afternoon. Seas 1 foot or less. Bay and inland waters light
chop. Numerous showers and scattered thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ870-201500-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
300 AM EDT Wed Aug 20 2025

.TODAY...North winds 5 to 10 knots, becoming northwest late. Seas
1 foot or less. Wave Detail: North 1 foot at 3 seconds. Scattered
showers and thunderstorms, mainly this morning.
.TONIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Isolated showers and
thunderstorms in the evening, then scattered showers and
thunderstorms after midnight.
.THURSDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northwest 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 3 seconds. Scattered
thunderstorms. Scattered showers in the evening, then numerous
showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. Widespread showers and
numerous thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less, then around 2 feet after midnight. Wave Detail: Southwest
1 foot at 4 seconds. Numerous showers. Numerous thunderstorms,
mainly in the evening.
.SATURDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. Widespread showers and scattered
thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Numerous showers and scattered thunderstorms.
.SUNDAY...West winds around 10 knots. Seas 1 foot or less.
Widespread showers and scattered thunderstorms.

Winds and seas higher in and near thunderstorms.

$$