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Ozello, FL - St. Martins River Coastal Forecast

FZUS52 KTBW 180715
CWFTBW

Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
215 AM EST Thu Dec 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.

GMZ800-182000-
Synopsis for the coastal waters from Bonita Beach to Suwannee River-
215 AM EST Thu Dec 18 2025

.SYNOPSIS...
Southeast winds are expected to increase and shift southwesterly
today and tonight ahead of a cold front. The cold front is
expected to move through the waters late this evening into early
Friday morning with showers and a few thunderstorm possible. High
pressure builds into the region with gusty northerly winds and
choppy seas Friday. The winds weaken with conditions improving
through the weekend.

&&

$$

GMZ830-182000-
Tampa Bay waters-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds around 10 knots, becoming south 10 to 15
knots this afternoon. Bay and inland waters light chop. A slight
chance of showers this afternoon.
.TONIGHT...South winds around 10 knots. Bay and inland waters
light chop. A slight chance of showers.
.FRIDAY...West winds around 10 knots, becoming northwest in the
afternoon. Bay and inland waters light chop.
.FRIDAY NIGHT...North winds around 10 knots. Bay and inland
waters light chop.
.SATURDAY...Northeast winds 5 to 10 knots. Bay and inland waters
light chop.
.SATURDAY NIGHT...Northeast winds around 5 knots. Bay and inland
waters smooth.
.SUNDAY...North winds 5 to 10 knots. Bay and inland waters light
chop.
.SUNDAY NIGHT...North winds 5 to 10 knots, becoming northeast
10 to 15 knots after midnight. Bay and inland waters a moderate
chop.
.MONDAY...Northeast winds 10 to 15 knots. Bay and inland waters a
moderate chop.

$$

GMZ836-182000-
Charlotte Harbor and Pine Island Sound-
215 AM EST Thu Dec 18 2025

.TODAY...East winds around 10 knots, becoming south this
afternoon. Bay and inland waters light chop.
.TONIGHT...South winds around 10 knots. Bay and inland waters
light chop.
.FRIDAY...Southwest winds around 10 knots, becoming northwest in
the afternoon. Bay and inland waters light chop.
.FRIDAY NIGHT...North winds around 10 knots. Bay and inland
waters light chop.
.SATURDAY...North winds 5 to 10 knots. Bay and inland waters
light chop.
.SATURDAY NIGHT...North winds around 5 knots, becoming northeast
after midnight. Bay and inland waters smooth.
.SUNDAY...Northeast winds around 5 knots, becoming northwest in
the afternoon. Bay and inland waters light chop.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Bay and inland
waters light chop.
.MONDAY...Northeast winds 10 to 15 knots. Bay and inland waters a
moderate chop.

$$

GMZ856-182000-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds around 10 knots, becoming south late.
Seas around 2 feet. Wave Detail: Southeast 1 foot at 4 seconds.
Bay and inland waters light chop.
.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 5 seconds. Bay and inland waters light
chop. A slight chance of showers in the evening.
.FRIDAY...West winds around 10 knots, becoming northwest in the
afternoon. Seas around 2 feet. Wave Detail: South 1 foot at 5
seconds. Bay and inland waters light chop.
.FRIDAY NIGHT...North winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds and south 1 foot at
4 seconds. Bay and inland waters a moderate chop.
.SATURDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Northwest 2 feet at 6 seconds and northeast 1 foot
at 3 seconds. Bay and inland waters light chop.
.SATURDAY NIGHT...North winds around 5 knots. Seas around 2 feet.
Wave Detail: Northwest 2 feet at 6 seconds. Bay and inland waters
smooth.
.SUNDAY...North winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 foot or
less, then around 2 feet after midnight. Bay and inland waters a
moderate chop.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet. Bay
and inland waters a moderate chop.

$$

GMZ876-182000-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Southeast 2 feet at 5 seconds. A slight chance of showers late.
.TONIGHT...South winds around 10 knots, becoming southwest after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
South 2 feet at 5 seconds. A slight chance of showers in the
evening.
.FRIDAY...West winds 5 to 10 knots, becoming northwest in the
afternoon. Seas 2 to 3 feet. Wave Detail: South 1 foot at
5 seconds.
.FRIDAY NIGHT...North winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: Northwest 2 feet at 5 seconds and southeast 1 foot
at 4 seconds.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 6 seconds and northeast 1 foot at
3 seconds.
.SATURDAY NIGHT...Northeast winds around 5 knots. Seas around
2 feet. Wave Detail: Northwest 2 feet at 6 seconds.
.SUNDAY...Northeast winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 foot or
less, then around 2 feet after midnight.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.

$$

GMZ853-182000-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to
20 knots, becoming south late. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 4 seconds. Bay and inland waters a moderate
chop. A slight chance of showers this afternoon.
.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. Bay and inland waters light
chop. A slight chance of showers.
.FRIDAY...West winds 5 to 10 knots, becoming northwest 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Northwest 2 feet at 4 seconds and southwest 2 feet at 7 seconds.
Bay and inland waters a moderate chop.
.FRIDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Northwest 3 feet at 6 seconds and south 1 foot at
4 seconds. Bay and inland waters a moderate chop.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 5 seconds and northeast 1 foot at
4 seconds. Bay and inland waters light chop.
.SATURDAY NIGHT...North winds around 5 knots. Seas around 2 feet
in the evening, then 1 foot or less. Wave Detail: Northwest
2 feet at 6 seconds and north 1 foot at 3 seconds, becoming
northwest 1 foot at 4 seconds. Bay and inland waters smooth.
.SUNDAY...North winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 foot or
less, then around 2 feet after midnight. Bay and inland waters a
moderate chop.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet. Bay
and inland waters a moderate chop.

$$

GMZ873-182000-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Southeast 3 feet at 5 seconds. A slight chance of showers late
this morning and early afternoon. A chance of showers late.
.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots,
becoming southwest after midnight. Seas 3 to 4 feet, occasionally
to 5 feet. Wave Detail: South 3 feet at 4 seconds. A slight
chance of showers.
.FRIDAY...West winds around 10 knots, becoming north in the
afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at
5 seconds and southeast 1 foot at 4 seconds.
.FRIDAY NIGHT...North winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: West 3 feet at 6 seconds and southeast 1 foot at
4 seconds.
.SATURDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Northwest 3 feet at 6 seconds and northeast 2 feet at 4 seconds.
.SATURDAY NIGHT...Northeast winds around 5 knots. Seas around
2 feet. Wave Detail: North 2 feet at 5 seconds.
.SUNDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 foot or
less, then around 2 feet after midnight.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.

$$

GMZ850-182000-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds 10 to 15 knots, becoming south late.
Seas around 2 feet. Wave Detail: Southeast 1 foot at 2 seconds and
south 1 foot at 5 seconds. Bay and inland waters light chop. A
slight chance of showers late this morning. A chance of showers
this afternoon. A slight chance of thunderstorms late.
.TONIGHT...Southwest 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 in the evening. A
chance of showers.
.FRIDAY...Northwest winds around 10 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 5 seconds. Bay and inland waters
light chop.
.FRIDAY NIGHT...North winds around 10 knots. Seas around 2 feet.
Wave Detail: Northwest 2 feet at 5 seconds and northeast 1 foot
at 2 seconds. Bay and inland waters light chop.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: West 2 feet at 6 seconds and north 1 foot at 3 seconds.
Bay and inland waters light chop.
.SATURDAY NIGHT...Northeast winds around 5 knots. Seas 1 foot or
less. Wave Detail: North 1 foot at 3 seconds. Bay and inland
waters smooth.
.SUNDAY...North winds around 5 knots. Seas 1 foot or less. Bay
and inland waters smooth.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less. Bay and inland waters light chop.
.MONDAY...Northeast winds 10 to 15 knots. Seas 1 foot or less.
Bay and inland waters a moderate chop.

Winds and seas higher in and near thunderstorms.

$$

GMZ870-182000-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
215 AM EST Thu Dec 18 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Southeast 3 feet at 4 seconds. A chance of showers late this
morning and early afternoon. A chance of showers with a slight
chance of thunderstorms late.
.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots,
becoming southwest after midnight. Seas 2 to 4 feet, occasionally
to 5 feet. Wave Detail: South 3 feet at 4 seconds. A slight
chance of thunderstorms in the evening. A chance of showers.
.FRIDAY...Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: West 3 feet at 6 seconds.
.FRIDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: North 3 feet at 4 seconds.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: North 2 feet at 4 seconds.
.SATURDAY NIGHT...Northeast winds around 5 knots. Seas around
2 feet in the evening, then 1 foot or less. Wave Detail:
Northeast 1 foot at 3 seconds and west 1 foot at 5 seconds,
becoming northeast 1 foot at 3 seconds and northwest 1 foot at
4 seconds.
.SUNDAY...North winds 5 to 10 knots. Seas 1 foot or less.
.SUNDAY NIGHT...North winds 5 to 10 knots, becoming northeast
10 to 15 knots after midnight. Seas 1 foot or less, then around
2 feet after midnight.
.MONDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$


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