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National Weather Service Marine Forecast FZUS52 KMFL

FZUS52 KMFL 180821
CWFMFL

Coastal Waters Forecast for Florida
National Weather Service Miami FL
321 AM EST Sun Jan 18 2026

Atlantic coastal waters from Jupiter Inlet to Ocean Reef out to 60 nm and Gulf coastal waters from East Cape Sable to Chokoloskee out 20 nm and Chokoloskee to Bonita Beach out 60 nm...including the waters of Biscayne Bay and Lake Okeechobee.

Seas are provided as a range of the average height of the highest 1/3 of the waves...along with the occasional height of the average highest 10 percent of the waves.

AMZ600-GMZ606-182100
321 AM EST Sun Jan 18 2026

.Synopsis for Jupiter Inlet to Ocean Reef FL out to 60 nm and for East Cape Sable to Bonita Beach FL out to 60 nm...

A cold front will approach and move through the local waters today. Scattered showers will be possible across the local waters out ahead of the front throughout the day. Isolated thunderstorms will also be possible mainly across the Atlantic waters. Behind the front, winds and seas will rapidly increase bringing hazardous marine conditions to the local waters heading into this afternoon and early next week.

Gulf Stream Hazards: Northwest winds increasing to 20 to 25 kts this afternoon with seas building and ranging between 7 to 9 feet tonight through early next week.

The approximate location of the west wall of the Gulf Stream as of Jan 15, 2026.

22 nautical miles north northeast of Fowey Rocks. 7 nautical miles east of Port Everglades. 9 nautical miles east of Lake Worth. 11 nautical miles east northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

AMZ650-670-182100
Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM
Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM
321 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EST THIS AFTERNOON THROUGH TUESDAY EVENING

TODAY
S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt early this afternoon, then becoming W with gusts up to 25 kt late. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and S 2 ft at 4 seconds. Intracoastal waters a moderate chop. A chance of showers this morning. A slight chance of tstms. Showers likely this afternoon.

TONIGHT
N winds 20 to 25 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: NW 6 ft at 6 seconds and S 1 foot at 4 seconds. Intracoastal waters a moderate chop.

MON
N winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: N 7 ft at 7 seconds. Intracoastal waters a moderate chop.

MON NIGHT
NE winds 15 to 20 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: N 6 ft at 7 seconds. Intracoastal waters a moderate chop.

TUE AND TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: NE 7 ft at 6 seconds. Intracoastal waters rough in exposed areas.

WED
NE winds 20 to 25 kt, becoming E 15 to 20 kt in the afternoon. Seas 5 to 8 ft, occasionally to 10 ft. Wave Detail: NE 7 ft at 7 seconds. Intracoastal waters rough in exposed areas.

WED NIGHT
E winds 15 to 20 kt. Seas 4 to 6 ft, occasionally to 8 ft. Intracoastal waters choppy in exposed areas. A chance of showers.

THU
E winds 15 to 20 kt, becoming NE in the afternoon. Seas 4 to 6 ft, occasionally to 8 ft. Intracoastal waters a moderate chop. A chance of showers in the morning, then showers likely in the afternoon.

THU NIGHT
NE winds 20 to 25 kt. Seas 5 to 8 ft, occasionally to 10 ft. Intracoastal waters rough in exposed areas. A chance of showers.

Winds and seas higher in and near tstms.

AMZ651-671-182100
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas
321 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EST THIS AFTERNOON THROUGH TUESDAY EVENING

TODAY
S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt late this morning and early afternoon, then becoming W 15 to 20 kt late. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and NW 2 ft at 3 seconds. Intracoastal waters a moderate chop. A chance of showers this morning. A slight chance of tstms. Showers likely this afternoon.

TONIGHT
N winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft, occasionally to 8 ft. Wave Detail: N 5 ft at 5 seconds. Intracoastal waters a moderate chop.

MON
N winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: N 7 ft at 8 seconds. Intracoastal waters a moderate chop.

MON NIGHT
NE winds 15 to 20 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave Detail: N 7 ft at 8 seconds. Intracoastal waters choppy in exposed areas.

TUE AND TUE NIGHT
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft, occasionally to 11 ft. Wave Detail: N 9 ft at 7 seconds. Intracoastal waters rough in exposed areas.

WED
NE winds 20 to 25 kt. Seas 6 to 9 ft, occasionally to 11 ft, subsiding to 5 to 7 ft, occasionally to 9 ft in the afternoon. Wave Detail: NE 8 ft at 8 seconds, becoming NE 7 ft at 7 seconds and E 3 ft at 3 seconds. Intracoastal waters rough in exposed areas.

WED NIGHT
E winds 15 to 20 kt. Seas 5 to 7 ft, occasionally to 9 ft. Intracoastal waters choppy in exposed areas. A chance of showers.

THU
E winds 15 to 20 kt. Seas 3 to 5 ft, occasionally to 6 ft. Intracoastal waters choppy in exposed areas. A chance of showers.

THU NIGHT
NE winds 15 to 20 kt. Seas 5 to 7 ft, occasionally to 9 ft. Intracoastal waters choppy in exposed areas. A chance of showers.

Winds and seas higher in and near tstms.

GMZ656-657-676-182100
Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM
Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM
Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM
321 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EST THIS MORNING THROUGH MONDAY AFTERNOON

TODAY
SE winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt late this morning, then becoming W 20 to 25 kt with gusts up to 35 kt early this afternoon, becoming N with gusts up to 30 kt late. Seas less than 2 ft or less, then 2 to 4 ft, occasionally to 5 ft this afternoon. Wave Detail: W 1 foot at 6 seconds, becoming W 4 ft at 6 seconds. Bay and inland waters a moderate chop. A slight chance of showers late this morning and early afternoon.

TONIGHT
N winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Seas 4 to 6 ft, occasionally to 8 ft. Wave Detail: NW 6 ft at 8 seconds. Bay and inland waters a moderate chop.

MON
N winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft, occasionally to 6 ft. Wave Detail: NW 5 ft at 8 seconds and N 4 ft at 4 seconds. Bay and inland waters a moderate chop.

MON NIGHT
NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 5 ft, occasionally to 6 ft. Wave Detail: N 4 ft at 4 seconds and NW 3 ft at 7 seconds. Bay and inland waters a moderate chop.

TUE AND TUE NIGHT
NE winds 20 to 25 kt. Seas 3 to 5 ft, occasionally to 6 ft. Wave Detail: N 5 ft at 5 seconds. Bay and inland waters a moderate chop.

WED
NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas 2 to 4 ft, occasionally to 5 ft. Wave Detail: N 4 ft at 5 seconds. Bay and inland waters a moderate chop.

THU
NE winds 10 to 15 kt. Seas 2 to 3 ft. Bay and inland waters light chop. A chance of showers.

THU NIGHT
NE winds 15 to 20 kt. Seas 2 to 3 ft. Bay and inland waters a moderate chop.

AMZ610-182100
Lake Okeechobee
321 AM EST Sun Jan 18 2026

SMALL CRAFT SHOULD EXERCISE CAUTION

TODAY
SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt early this afternoon, then becoming NW 15 to 20 kt with gusts up to 25 kt late. Lake waters choppy.

TONIGHT
N winds 15 to 20 kt. Lake waters choppy.

MON
N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Lake waters choppy.

MON NIGHT
N winds 15 to 20 kt. Lake waters choppy.

TUE
N winds 15 to 20 kt. Lake waters choppy.

TUE NIGHT
NE winds 15 to 20 kt. Lake waters choppy.

WED
NE winds 10 to 15 kt, diminishing to 5 to 10 kt. Lake waters a moderate chop.

THU
N winds 5 to 10 kt, increasing to 10 to 15 kt. Lake waters a moderate chop. A chance of showers.

AMZ630-182100
Biscayne Bay
321 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH MONDAY MORNING

TODAY
S winds 5 to 10 kt, becoming SW early this afternoon, then becoming W late. A moderate chop. A chance of showers with a slight chance of tstms late this morning and afternoon.

TONIGHT
N winds 15 to 20 kt. Choppy.

MON
N winds 15 to 20 kt. Choppy.

MON NIGHT
N winds 15 to 20 kt. Choppy.

TUE AND TUE NIGHT
NE winds 20 to 25 kt. Rough.

WED
NE winds 15 to 20 kt. Choppy.

WED
NE winds 15 to 20 kt, becoming E 10 to 15 kt. Choppy. A chance of showers.

THU NIGHT
NE winds 10 to 15 kt. A moderate chop. A chance of showers in the evening.

Winds and waves higher in and near tstms.