704
FZUS52 KTBW 181801
CWFTBW

Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
201 PM EDT Mon Aug 18 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.

GMZ800-190630-
Synopsis for the coastal waters from Bonita Beach to Suwannee River-
201 PM EDT Mon Aug 18 2025

.SYNOPSIS...

While a few thunderstorms will continue to be possible off the coast
through the evening, the overall expectation is for most of
thunderstorm activity to be confined to inshore waters and over
land. As the flow transitions to an ENE flow tomorrow, a few storms
could move offshore later in the day, but overall storm coverage
should continue to be lower through Wednesday. By late week, though,
rain chances increase across Gulf waters as a WSW flow settles in
and greater moisture returns. Winds remain under 15 knots through
the period, keeping seas generally light outside of thunderstorms. A
slight increase to around 2 feet is possible in the evenings as
winds pick up from the east after the sea breeze collapses.
Additionally, a WSW flow allowing for a longer fetch of wind over
the waters could yield seas of up to around 2 feet late in the
week.

&&

$$

GMZ830-190630-
Tampa Bay waters-
201 PM EDT Mon Aug 18 2025

.TONIGHT...North winds 5 to 10 knots, becoming east late this
evening and overnight. Bay and inland waters light chop.
Scattered showers and thunderstorms this evening.
.TUESDAY...Northeast winds 5 to 10 knots, becoming north in the
afternoon. Bay and inland waters light chop. Isolated showers and
thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots. Bay and inland
waters light chop. Scattered showers and thunderstorms, mainly in
the evening.
.WEDNESDAY...North winds 5 to 10 knots, becoming northwest 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 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. Bay and inland waters light
chop. Scattered showers. Isolated thunderstorms in the morning,
then scattered thunderstorms in the afternoon.
.THURSDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms, mainly in the
evening.
.FRIDAY...West winds 5 to 10 knots. Bay and inland waters light
chop. Scattered showers and thunderstorms in the morning, then
numerous showers and thunderstorms in the afternoon.
.FRIDAY NIGHT...West winds 5 to 10 knots, becoming northeast
after midnight. Bay and inland waters light chop. Numerous
showers and thunderstorms, mainly in the evening.
.SATURDAY...Southeast winds around 5 knots, becoming west in the
afternoon. Bay and inland waters light chop. Scattered showers
and thunderstorms in the morning, then numerous showers and
thunderstorms in the afternoon.

Winds and waves higher in and near thunderstorms.

$$

GMZ836-190630-
Charlotte Harbor and Pine Island Sound-
201 PM EDT Mon Aug 18 2025

.TONIGHT...Northwest winds 5 to 10 knots, becoming northeast late
this evening and overnight. Bay and inland waters light chop.
Scattered showers and thunderstorms this evening.
.TUESDAY...Northeast winds around 5 knots, becoming northwest in
the afternoon. Bay and inland waters light chop. Scattered
showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...North winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots, becoming northwest 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Isolated showers and thunderstorms in the morning, then scattered
showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 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. Bay and inland waters light
chop. Scattered showers. Isolated thunderstorms in the morning,
then scattered thunderstorms in the afternoon.
.THURSDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms, mainly in the
evening.
.FRIDAY...West winds 5 to 10 knots. Bay and inland waters light
chop. Scattered showers and thunderstorms in the morning, then
numerous showers and thunderstorms in the afternoon.
.FRIDAY NIGHT...Northwest winds 5 to 10 knots. Bay and inland
waters light chop. Numerous showers and thunderstorms, mainly in
the evening.
.SATURDAY...Northwest winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ856-190630-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...Northwest winds around 10 knots, becoming northeast
late this evening and overnight. Seas 1 foot or less. Wave
Detail: North 1 foot at 2 seconds. Bay and inland waters light
chop. Scattered showers and thunderstorms, mainly this evening.
.TUESDAY...Northeast winds 5 to 10 knots, becoming northwest in
the afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Bay and inland waters light chop. Scattered showers
and thunderstorms in the afternoon.
.TUESDAY NIGHT...North winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots, becoming northwest 10 to
15 knots in the afternoon. Seas 1 foot or less. Wave Detail:
North 1 foot at 3 seconds. Bay and inland waters a moderate chop.
Isolated thunderstorms. Isolated showers in the morning, then
scattered showers in the afternoon.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight. Seas 1 foot or less. Wave Detail:
Northwest 1 foot at 3 seconds. Bay and inland waters a moderate
chop. Isolated thunderstorms. Scattered showers, mainly in the
evening.
.THURSDAY...West winds 5 to 10 knots. 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.
Bay and inland waters light chop. Scattered showers and
thunderstorms.
.FRIDAY...West winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop. Scattered showers and thunderstorms.
.FRIDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Bay and inland waters light chop. Scattered showers and
thunderstorms.
.SATURDAY...West winds 5 to 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.

$$

GMZ876-190630-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...Northwest winds 5 to 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Isolated showers and thunderstorms early this evening,
then scattered showers and thunderstorms late this evening and
early morning. Isolated showers and thunderstorms late.
.TUESDAY...Northeast winds around 5 knots, becoming north in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
3 seconds. Isolated showers and thunderstorms in the morning,
then scattered showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...North winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Northwest 1 foot at 3 seconds. Scattered
showers. Isolated thunderstorms in the evening, then scattered
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...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.FRIDAY...West winds around 5 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.FRIDAY NIGHT...West winds around 5 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.SATURDAY...West winds around 5 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ853-190630-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...North winds 5 to 10 knots, becoming east late this
evening and overnight. Seas 1 foot or less. Wave Detail:
Northeast 1 foot at 3 seconds and north 1 foot at 3 seconds. Bay
and inland waters light chop. Scattered showers and
thunderstorms, mainly this evening.
.TUESDAY...Northeast winds 5 to 10 knots, becoming north in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
3 seconds. Bay and inland waters light chop. Scattered showers
and thunderstorms.
.TUESDAY NIGHT...Northeast winds around 10 knots. Seas 1 foot or
less. Wave Detail: North 1 foot at 3 seconds. Bay and inland
waters light chop. Scattered showers and thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots, becoming northwest 10 to
15 knots in the 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.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight. 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 5 to 10 knots. 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.
Bay and inland waters light chop. Scattered showers and
thunderstorms.
.FRIDAY...West winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop. Scattered showers and thunderstorms.
.FRIDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Bay and inland waters light chop. Scattered showers and
thunderstorms.
.SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less. Bay
and inland waters light chop. Numerous showers and scattered
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ873-190630-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...North winds 5 to 10 knots, becoming east after
midnight. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
3 seconds. Isolated showers and thunderstorms early this evening,
then scattered showers and thunderstorms late this evening and
overnight.
.TUESDAY...East winds 5 to 10 knots, becoming north in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
3 seconds. Scattered showers and thunderstorms.
.TUESDAY NIGHT...North winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...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: North 1 foot at 3 seconds. Scattered showers and
thunderstorms.
.THURSDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.FRIDAY...West winds 5 to 10 knots. Seas 1 foot or less. Numerous
showers and scattered thunderstorms.
.FRIDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less.
Numerous showers and scattered thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ850-190630-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...North winds 5 to 10 knots, becoming east late this
evening and overnight. Seas 1 foot or less. Wave Detail:
Northeast 1 foot at 3 seconds. Bay and inland waters light chop.
Scattered showers and thunderstorms this evening, then isolated
showers and thunderstorms after midnight. Scattered showers and
thunderstorms late.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers and thunderstorms.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Northeast 1 foot at 2 seconds. Bay and inland
waters light chop. Scattered showers. Scattered thunderstorms,
mainly in the evening.
.WEDNESDAY...North winds around 10 knots, becoming northwest in
the afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Bay and inland waters light chop. Isolated showers and
thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: North 1 foot at 3 seconds. Bay and inland
waters light chop. Scattered showers and thunderstorms.
.THURSDAY...West winds 5 to 10 knots. 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.
Bay and inland waters light chop. Scattered showers and
thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less. Bay
and inland waters light chop. Numerous showers. Scattered
thunderstorms in the morning, then numerous thunderstorms in the
afternoon.
.FRIDAY NIGHT...West winds around 5 knots, becoming south after
midnight. Seas 1 foot or less. Bay and inland waters smooth.
Numerous showers and thunderstorms, mainly in the evening.
.SATURDAY...South winds around 5 knots, becoming west in the
afternoon. Seas 1 foot or less. Bay and inland waters light chop.
Numerous showers. Scattered thunderstorms in the morning, then
numerous thunderstorms in the afternoon.

Winds and seas higher in and near thunderstorms.

$$

GMZ870-190630-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
201 PM EDT Mon Aug 18 2025

.TONIGHT...Northeast winds 5 to 10 knots, becoming east after
midnight. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
3 seconds. Scattered showers and thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 3 seconds. Scattered thunderstorms.
Numerous showers, mainly in the morning.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Northeast 1 foot at 3 seconds. Scattered
showers and thunderstorms.
.WEDNESDAY...Northeast winds around 10 knots, becoming north in
the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot
at 3 seconds and north 1 foot at 3 seconds. Scattered showers.
Isolated thunderstorms in the morning, then scattered
thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: North 1 foot at 3 seconds. Scattered 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...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.FRIDAY...West winds around 5 knots. Seas 1 foot or less.
Numerous showers and scattered thunderstorms.
.FRIDAY NIGHT...West winds around 5 knots. Seas 1 foot or less.
Scattered thunderstorms. Scattered showers in the evening, then
numerous showers after midnight.
.SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less.
Numerous showers and scattered thunderstorms.

Winds and seas higher in and near thunderstorms.

$$