Coastal Waters Forecast
Issued by NWS Tampa Bay Area, FL

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815
FZUS52 KTBW 171826
CWFTBW

Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
226 PM EDT Sun Aug 17 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.

GMZ800-180700-
Synopsis for the coastal waters from Bonita Beach to Suwannee River-
226 PM EDT Sun Aug 17 2025

.SYNOPSIS...

Light winds and seas continue with high pressure directly overhead.
However, some thunderstorms should be expected near and along the
coast during the afternoon and evening, with additional
thunderstorms forming offshore overnight and towards the morning
hours. By mid-week, the flow will shift to the NE and then to the
SW, with a slight increase in winds and seas likely. Scattered
thunderstorms will remain possible, becoming more prevalent by
late-week.

&&

$$

GMZ830-180700-
Tampa Bay waters-
226 PM EDT Sun Aug 17 2025

.TONIGHT...Northwest winds 5 to 10 knots, becoming east late this
evening and overnight. Bay and inland waters light chop. Numerous
showers and thunderstorms early this evening, then scattered
showers and thunderstorms late this evening.
.MONDAY...East winds around 5 knots, becoming west in the
afternoon. Bay and inland waters light chop. Scattered showers
and thunderstorms in the afternoon.
.MONDAY NIGHT...North winds 5 to 10 knots, becoming east after
midnight. Bay and inland waters light chop. Numerous showers and
thunderstorms, mainly in the evening.
.TUESDAY...Northeast winds 5 to 10 knots. 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, mainly in the
evening.
.WEDNESDAY...North winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Bay and inland
waters light chop. Isolated showers and thunderstorms.
.THURSDAY...West winds 5 to 10 knots. Bay and inland waters light
chop. Scattered showers and thunderstorms.
.THURSDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms, mainly in the
evening.
.FRIDAY...Southwest winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ836-180700-
Charlotte Harbor and Pine Island Sound-
226 PM EDT Sun Aug 17 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.
.MONDAY...Southeast winds around 5 knots, becoming west in the
afternoon. Bay and inland waters light chop. Scattered showers
and thunderstorms in the afternoon.
.MONDAY NIGHT...North winds 5 to 10 knots, becoming northeast
after midnight. Bay and inland waters light chop. Scattered
showers and thunderstorms.
.TUESDAY...Northeast winds around 5 knots, becoming northwest in
the afternoon. Bay and inland waters light chop. Numerous showers
and thunderstorms in the afternoon.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots, becoming
northeast after midnight. Bay and inland waters light chop.
Scattered showers and thunderstorms.
.WEDNESDAY...North winds around 5 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Isolated showers and thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Bay and inland
waters light chop. Isolated showers and thunderstorms.
.THURSDAY...West winds 5 to 10 knots. Bay and inland waters light
chop. Scattered showers and thunderstorms.
.THURSDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms, mainly in the
evening.
.FRIDAY...Southwest winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ856-180700-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
226 PM EDT Sun Aug 17 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ876-180700-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
226 PM EDT Sun Aug 17 2025

.TONIGHT...Northwest winds around 5 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: Northwest
1 foot at 3 seconds. Isolated showers and thunderstorms this
evening, then scattered showers and thunderstorms after midnight.
.MONDAY...Southeast winds around 5 knots, becoming west around
5 knots in the afternoon. Seas 1 foot or less. Scattered showers
and thunderstorms.
.MONDAY NIGHT...Northwest winds 5 to 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Scattered showers and thunderstorms.
.TUESDAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: North 1 foot at 2 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...Northwest 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. Isolated showers and thunderstorms in the evening, then
scattered showers and thunderstorms after midnight.
.THURSDAY...West winds around 5 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds around 5 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ853-180700-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
226 PM EDT Sun Aug 17 2025

.TONIGHT...Northwest winds 5 to 10 knots, becoming east after
midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Bay and inland waters light chop. Scattered showers
and thunderstorms early this evening, then isolated showers and
thunderstorms late this evening and overnight.
.MONDAY...East winds around 5 knots, becoming west in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
2 seconds. Bay and inland waters light chop. Isolated showers and
thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...North winds 5 to 10 knots, becoming east after
midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Bay and inland waters light chop. Scattered showers
and thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots, becoming north in the
afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Bay and inland waters light chop. Isolated showers and
thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...North winds around 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Bay and inland waters light chop. Scattered showers
and thunderstorms.
.WEDNESDAY...Northeast winds 5 to 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. Bay and inland waters light chop. Isolated showers and
thunderstorms.
.THURSDAY...West winds 5 to 10 knots. Seas 1 foot or less. 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. Scattered showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ873-180700-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
226 PM EDT Sun Aug 17 2025

.TONIGHT...North winds around 5 knots, becoming northeast after
midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Isolated showers and thunderstorms this evening, then
scattered showers and thunderstorms after midnight.
.MONDAY...Southeast winds around 5 knots, becoming southwest in
the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot
at 2 seconds. Scattered showers and thunderstorms.
.MONDAY NIGHT...North winds 5 to 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: Northeast
1 foot at 2 seconds. Scattered showers and thunderstorms.
.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. 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. 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.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Numerous showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ850-180700-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
226 PM EDT Sun Aug 17 2025

.TONIGHT...North winds around 5 knots, becoming east late this
evening and overnight. Seas 1 foot or less. Wave Detail:
Northeast 1 foot at 2 seconds. Bay and inland waters light chop.
Numerous showers and thunderstorms early this evening, then
scattered showers and thunderstorms late this evening. Isolated
showers and thunderstorms after midnight.
.MONDAY...East winds 5 to 10 knots, becoming northwest in the
afternoon. Seas 1 foot or less. Wave Detail: East 1 foot at
2 seconds. Bay and inland waters light chop. Isolated showers and
thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon.
.MONDAY 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 and thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots, becoming north in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
2 seconds. 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. Seas 1 foot or
less. Wave Detail: North 1 foot at 2 seconds. Bay and inland
waters light chop. Scattered showers and thunderstorms, mainly in
the evening.
.WEDNESDAY...North 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. Isolated showers and
thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. 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. Seas 1 foot or less. 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. Scattered showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ870-180700-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
226 PM EDT Sun Aug 17 2025

.TONIGHT...North winds around 5 knots, becoming east late. Seas
1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds.
Scattered showers and thunderstorms.
.MONDAY...East winds 5 to 10 knots, becoming northeast in the
afternoon. Seas 1 foot or less. Wave Detail: East 1 foot at
2 seconds. Scattered showers and thunderstorms.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Northeast 1 foot at 2 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 showers and
thunderstorms.
.TUESDAY NIGHT...North winds 5 to 10 knots, becoming northeast
after midnight. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Scattered showers and thunderstorms.
.WEDNESDAY...Northeast winds 5 to 10 knots, becoming northwest in
the afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. Scattered showers and thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Scattered showers and thunderstorms.
.THURSDAY...West winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Scattered showers and thunderstorms.
.FRIDAY...Southwest winds around 5 knots. Seas 1 foot or less.
Numerous showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$