Biscayne Bay
Tonight: N winds 10 to 15 kt. A moderate chop. A chance of showers and tstms this evening. A slight chance of showers after midnight.
Biscayne Bay on the map
The zone and the zones around it, tinted where a marine warning or advisory is in force. Tap a neighboring zone to open its forecast.
- Small Craft Advisory
Now
The nearest stations reporting each, as of Sat, Sep 26, 3:00 AM EDT.
- Wind
- NNW 5 kt, gusts 10 kt at VAKF1
- Waves
- 2.6 ft at 14 s at 41122
- Water
- 85°F at VAKF1
Alerts in force
No marine warning or advisory is in force for this zone.
What is normally issued here: in the past year NWS Miami issued 56 Special Marine Warnings, 1 Gale Warning, 1 Gale Watch, 1 Tropical Storm Watch for this zone.
The forecast
Coastal Waters Forecast from National Weather Service Miami FL, issued Fri, Sep 25, 4:11 PM EDT, valid until Sat, Sep 26, 5:00 AM EDT. Wind in knots, seas in feet.
- Tonight
- N winds 10 to 15 kt. A moderate chop. A chance of showers and tstms this evening. A slight chance of showers after midnight.
- Saturday
- N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. A moderate chop.
- Saturday night
- NE winds around 5 kt, becoming N after midnight. Light chop. A chance of showers until early morning.
- Sunday
- N winds 5 to 10 kt, becoming E in the afternoon. Light chop.
- Sunday night
- S winds around 5 kt, becoming SW after midnight. Smooth.
- Monday
- W winds around 5 kt, becoming S in the afternoon. Smooth. A chance of showers and tstms in the afternoon.
- Monday night
- S winds around 5 kt. Smooth. A chance of showers and tstms early in the evening. A chance of showers and tstms after midnight.
- Tuesday
- S winds around 5 kt. Smooth. Showers likely with a chance of tstms in the morning, then showers with tstms likely in the afternoon.
- Tuesday night
- SE winds around 5 kt. Smooth. Tstms likely in the evening. Showers. A chance of tstms after midnight.
- Wednesday
- E winds 5 to 10 kt. Light chop. Showers likely with a chance of tstms.
- Wednesday night
- E winds 10 to 15 kt. A moderate chop. Showers likely with a chance of tstms.
Winds and waves higher in and near tstms.
Synopsis
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
Moderate to fresh northerly winds are expected today, which will decrease a bit and remain moderate for Saturday. Seas are expected to build to 7-10 feet and Gulf seas up to 3-4 feet through Saturday. A Small Craft Advisory is in effect through Sunday morning for the coastal and offshore Palm Beach waters and through Saturday evening for the rest of the Atlantic waters. Isolated to scattered showers and thunderstorms will continue to develop at times each day, which may result in locally hazardous winds and seas.
Gulf Stream Hazards: Sustained winds up to 20 knots and 7-10 foot seas.
The approximate location of the west wall of the Gulf Stream as of Sep 23, 2026.
1 nautical miles north northeast of Fowey Rocks. 7 nautical miles east of Port Everglades. 6 nautical miles south southeast of Lake Worth. 6 nautical miles east southeast of Jupiter Inlet.
This data courtesy of the Naval Oceanographic Office.
Buoys and stations nearby
The latest report from each station within reach of the zone, nearest first. Distances in nautical miles from the middle of the zone.
| Station | Distance | Wind | Waves | Water | Air | Pressure | Reported |
|---|---|---|---|---|---|---|---|
| VAKF1 8723214 - Virginia Key, FL | 11 nm | NNW 5 kt, gusts 10 | 85°F | 78°F | 1012.1 hPa | Sat, Sep 26, 2:48 AM EDT | |
| 41122 Hollywood Beach, FL (265) | 28 nm | 2.6 ft at 14 s from ENE | 86°F | 79°F | Sat, Sep 26, 3:00 AM EDT | ||
| PEGF1 8722956 - Port Everglades, FL | 33 nm | NW 10 kt, gusts 13 | 78°F | 1011.8 hPa | Sat, Sep 26, 2:48 AM EDT | ||
| LONF1 Long Key, FL | 55 nm | NE 13 kt, gusts 15 | 81°F | 1010.5 hPa | Sat, Sep 26, 3:00 AM EDT | ||
| LKWF1 8722670 - Lake Worth Pier, FL | 64 nm | NNW 7 kt, gusts 10 | 86°F | 77°F | 1012.7 hPa | Sat, Sep 26, 2:48 AM EDT | |
| VCAF1 8723970 - Vaca Key, FL | 69 nm | NE 11 kt, gusts 13 | 86°F | 82°F | 1011.5 hPa | Sat, Sep 26, 2:48 AM EDT |
The past year
Warnings, watches and advisories the National Weather Service issued for this zone over the past 12 months, from the Iowa Environmental Mesonet’s archive.
| Product | Issued | Most recent |
|---|---|---|
| Special Marine Warning | 56 | Sun, Sep 20, 2026, 5:11 PM EDT |
| Gale Warning | 1 | Sat, Jan 31, 2026, 1:00 PM EST |
| Gale Watch | 1 | Sat, Jan 31, 2026, 7:00 PM EST |
| Tropical Storm Watch | 1 | Sat, Sep 27, 2025, 5:00 PM EDT |
| Small Craft Advisory | 18 | Mon, Apr 20, 2026, 8:00 PM EDT |
What this means
Marine forecasts give wind in knots (1 knot is 1.15 mph) and seas in feet, except the high seas forecasts, which give seas in meters. Seas are the significant wave height, the average of the highest third of the waves; individual waves may be more than twice that. On the Great Lakes the forecast gives waves, not seas. "Wave Detail" splits the seas into the wind waves and each swell, with its direction and period.
Each coastal office writes a Coastal Waters Forecast for the bays, sounds and ocean out to 20 to 60 nautical miles, or on the Great Lakes a Nearshore Marine Forecast within 5 nautical miles of shore; the Open Lakes Forecast covers the rest of each lake. The Ocean Prediction Center and the National Hurricane Center write the Offshore Waters Forecasts out to about 250 nautical miles, and the High Seas Forecasts beyond. Forecasts are issued at least twice a day and updated when they go wrong.
- Small Craft Advisory
- Winds or conditions hazardous to small boats. The thresholds are set by each NWS region: typically sustained winds or frequent gusts of 20 to 25 knots up to 33 knots, and seas of 5 to 7 feet or more.
- Gale Warning
- Sustained winds or frequent gusts of 34 to 47 knots, not from a tropical cyclone.
- Storm Warning
- Sustained winds or frequent gusts of 48 to 63 knots, not from a tropical cyclone.
- Hurricane Force Wind Warning
- Sustained winds or frequent gusts of 64 knots or more, not from a tropical cyclone.
- Special Marine Warning
- A thunderstorm or squall over the water with winds or gusts of 34 knots or more, hail of 3/4 inch or more, or a waterspout, for up to two hours.
- Hazardous Seas Warning
- Wave heights or steepness at or above the office’s warning threshold, when the wind alone does not warrant a warning.
- Heavy Freezing Spray Warning
- Spray freezing on a vessel at 2 cm (3/4 inch) an hour or more.
- Tropical Storm and Hurricane Warnings
- Tropical storm (34 to 63 knots) or hurricane (64 knots or more) conditions expected within 36 hours. Watches: possible within 48 hours.
Nearby
- Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM
- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
- Hawk Channel from Ocean Reef to Craig Key out to the reef
- Straits of Florida from Ocean Reef to Craig Key out 20 NM
- Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas
- Bayside and Gulfside from Craig Key to West End of Seven Mile Bridge
- Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM
- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out
- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef
- Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM
Open the live map with marine zones and buoysThe hour-by-hour forecast for the middle of the zoneMiami Beach AreaEvery Atlantic Coast zone
Sources
Coastal Waters Forecast CWFMFL from National Weather Service Miami FL, issued Fri, Sep 25, 4:11 PM EDT. Original at NWS. Buoy reports from the National Data Buoy Center. Past products from the Iowa Environmental Mesonet. Zone outlines from the NWS marine and offshore zone boundaries. Warnings and advisories from the NWS API, read 07:41 UTC. All public domain, from the National Weather Service.