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FLORIDA KEYS

Key Largo to Key West — Backcountry, reef, and offshore

1
GO
3
CAUTION
0
HOLD
LiveUpdated: 06:33 PM UTC
8
ADVISORIES
MINOR
Dense Fog AdvisoryMarine Weather StatementSmall Craft Advisory+5 more
NW FloridaCentral West FLNE FloridaFlorida Keys
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TODAY'S BRIEFING
James Van Fleet
Chief Meteorologist

"Winds at 14 knots, seas 3.8 ft across Florida Keys. Check individual port conditions before departure."

Auto-generated from live conditions · Updated hourly
CURRENT CONDITIONS · LIVE
Key Largo
Moderate — Good Conditions
GO
Wind
13kts
E
Seas
3.0ft
5s period
Air Temp
78°F
79% RH
Sea Surface Temp
76°F
Moderate
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Islamorada
Moderate — Use Caution
CAUTION
Wind
16kts
E
Seas
3.7ft
5s period
Air Temp
77°F
83% RH
Sea Surface Temp
77°F
Moderate
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Marathon
Moderate — Use Caution
CAUTION
Wind
15kts
E
Seas
4.1ft
5s period
Air Temp
80°F
76% RH
Sea Surface Temp
77°F
Moderate
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Key West
Moderate — Use Caution
CAUTION
Wind
13kts
E
Seas
4.3ft
5s period
Air Temp
80°F
78% RH
Sea Surface Temp
74°F
Moderate
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7-DAY OUTLOOK
Regional Forecast
Based on Marathon · Max daily wind and seas
Day
Wind
Seas
Temp
Rain
Status
Today
2026-03-07
15kts
4.1ft
81°/73°
Dry
CAUTION
Tomorrow
2026-03-08
15kts
3.4ft
81°/74°
Dry
CAUTION
Mon, Mar 9
2026-03-09
16kts
2.8ft
77°/73°
0.4mm
CAUTION
Tue, Mar 10
2026-03-10
17kts
3.1ft
76°/76°
Dry
CAUTION
Wed, Mar 11
2026-03-11
17kts
3.8ft
76°/76°
Dry
CAUTION
Thu, Mar 12
2026-03-12
14kts
3.0ft
76°/75°
0.2mm
GO
Fri, Mar 13
2026-03-13
14kts
1.5ft
76°/74°
0.4mm
GO
OFFICIAL NWS COASTAL WATERS FORECAST
NWS
OFFICIAL MARINE FORECAST
NOAA NATIONAL WEATHER SERVICE · COASTAL WATERS FORECAST
ISSUED
Sat, Mar 7, 03:20 PM UTC
SYNOPSIS

High pressure is centered over Bermuda with the western periphery of this ridge extending west into Florida and the Gulf. This will continue to promote moderate to fresh breezes this afternoon and tonight. Slight weakening of the high Sunday into early next week will result in modest slackening to gentle to moderate breezes, though, moderate to fresh breezes are expected to continue across the Straits. As the high retreats into Atlantic next week, breezes will shift to the east to southeast. The Approximate Shoreward Edge of the Gulf Stream as of March 7... 55 NM South of Dry Tortugas Light...on Loggerhead Key. 15 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 7 NM South of Sand Key Light...off Key West. 8 NM South of Looe Key...off Big Pine Key. 10 NM Southeast of Sombrero Key Light...off Marathon. 8 NM Southeast of Alligator Reef Light...off Islamorada. 5 NM Southeast of Molasses Reef Light...off Key Largo. 3 NM Southeast of Carysfort Reef Light...off Ocean Reef. Gulf Stream Information Courtesy of the National Weather Service in Key West based on products from NASA SPoRT and RTOFS.

GULF STREAM EDGE

The Approximate Shoreward Edge of the Gulf Stream as of March 7... 55 NM South of Dry Tortugas Light...on Loggerhead Key. 15 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 7 NM South of Sand Key Light...off Key West. 8 NM South of Looe Key...off Big Pine Key. 10 NM Southeast of Sombrero Key Light...off Marathon. 8 NM Southeast of Alligator Reef Light...off Islamorada. 5 NM Southeast of Molasses Reef Light...off Key Largo. 3 NM Southeast of Carysfort Reef Light...off Ocean Reef. Gulf Stream Information Courtesy of the National Weather Service in Key West based on products from NASA SPoRT and RTOFS.

PERIOD FORECAST
THIS AFTERNOON

East winds 15 to 20 knots, decreasing to near 15 knots. Bay waters choppy, becoming a moderate chop. Isolated showers.

TONIGHT

East winds 15 to 20 knots. Bay waters choppy. Isolated showers.

SUNDAY

East winds near 15 knots. Bay waters a moderate chop. Isolated showers.

NOAA.GOV ›
NOTICE: Weather data sourced from Open-Meteo and updated every 10 minutes. Go/No-Go assessments are based on general guidelines (winds under 15 kts and seas under 3.5 ft = GO; 15-25 kts or 3.5-6 ft = CAUTION; above 25 kts or 6 ft = HOLD). Sea surface temperature data is from the Open-Meteo Marine API. Always consult official NOAA marine forecasts and use your own judgment before getting underway. Conditions can change rapidly.