Nearby Harbors
24.6017’ N, 81.6550’ W

Big Coppitt Key, Waltz Key Basin, FL

77°
H -°
L 74°
NNE
16mph
High tide
1:34 am
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Big Coppitt Key, Waltz Key Basin, FL Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sat
Oct 24 		Clear -º / 74º 4% NNE 17 mph 70%
Sun
Oct 25 		Partly Cloudy/Wind
View Hourly 		82º / 76º 19% NNE 22 mph 74%
12am Clear 77º 1% NNE 16 mph 65%
1am Clear 77º 1% NNE 17 mph 69%
2am Clear 76º 2% NNE 16 mph 71%
3am Clear 76º 2% NNE 15 mph 73%
4am Clear 76º 2% N 15 mph 76%
5am Clear 76º 2% N 15 mph 77%
6am Mostly Clear 76º 4% N 16 mph 79%
7am Partly Cloudy 75º 7% N 16 mph 80%
8am Mostly Sunny 76º 9% N 15 mph 80%
9am Partly Cloudy 76º 10% N 16 mph 79%
10am Partly Cloudy 78º 11% N 17 mph 77%
11am Mostly Cloudy 79º 20% NNE 17 mph 75%
12pm Partly Cloudy 80º 15% NNE 18 mph 73%
1pm Partly Cloudy 81º 11% NNE 17 mph 71%
2pm Partly Cloudy 81º 9% NNE 18 mph 70%
3pm Partly Cloudy 81º 13% NNE 19 mph 69%
4pm Partly Cloudy 82º 14% NNE 18 mph 69%
5pm Partly Cloudy/Wind 81º 18% NNE 21 mph 70%
6pm Partly Cloudy/Wind 81º 18% NE 22 mph 72%
7pm Mostly Cloudy/Wind 79º 24% NE 20 mph 76%
8pm Mostly Cloudy/Wind 79º 24% NE 20 mph 78%
9pm Partly Cloudy/Wind 78º 14% NE 21 mph 79%
10pm Partly Cloudy/Wind 78º 18% NNE 21 mph 79%
11pm Partly Cloudy/Wind 78º 14% NE 21 mph 81%
Mon
Oct 26 		Partly Cloudy/Wind
View Hourly 		83º / 76º 24% NNE 25 mph 73%
12am Partly Cloudy/Wind 77º 15% NNE 20 mph 82%
1am Partly Cloudy/Wind 77º 13% NNE 21 mph 83%
2am Partly Cloudy/Wind 77º 9% NNE 20 mph 84%
3am Partly Cloudy 77º 12% NNE 19 mph 82%
4am Partly Cloudy/Wind 77º 15% NNE 20 mph 84%
5am Partly Cloudy/Wind 77º 20% NNE 21 mph 84%
6am Partly Cloudy/Wind 77º 15% NNE 22 mph 84%
7am Partly Cloudy/Wind 77º 14% NNE 22 mph 84%
8am Mostly Cloudy/Wind 77º 9% NNE 22 mph 82%
9am Partly Cloudy/Wind 78º 10% NNE 23 mph 81%
10am Partly Cloudy/Wind 79º 7% NNE 24 mph 78%
11am Partly Cloudy/Wind 80º 9% NNE 24 mph 74%
12pm Partly Cloudy/Wind 81º 21% NE 25 mph 72%
1pm Partly Cloudy/Wind 82º 22% NE 24 mph 69%
2pm Partly Cloudy/Wind 83º 24% NE 24 mph 68%
3pm Partly Cloudy/Wind 83º 24% NE 23 mph 67%
4pm Partly Cloudy/Wind 83º 20% NE 23 mph 66%
5pm Partly Cloudy/Wind 83º 16% NE 24 mph 67%
6pm Partly Cloudy/Wind 82º 24% NE 23 mph 68%
7pm Partly Cloudy/Wind 81º 13% NE 23 mph 70%
8pm Partly Cloudy/Wind 80º 10% NE 24 mph 74%
9pm Mostly Clear/Wind 79º 9% NE 23 mph 73%
10pm Partly Cloudy/Wind 79º 9% NNE 22 mph 74%
11pm Partly Cloudy/Wind 78º 9% NNE 22 mph 76%
Tue
Oct 27 		Partly Cloudy/Wind 83º / 76º 21% NNE 22 mph 74%
Wed
Oct 28 		Partly Cloudy/Wind 84º / 78º 22% NE 20 mph 76%
Thu
Oct 29 		Partly Cloudy 84º / 77º 24% ENE 13 mph 77%
Fri
Oct 30 		Partly Cloudy 83º / 77º 16% NE 12 mph 77%
Sat
Oct 31 		Mostly Sunny 84º / 77º 14% ENE 14 mph 77%

Weather Radar for Big Coppitt Key, Waltz Key Basin, FL See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Big Coppitt Key, Waltz Key Basin, FL

Tonight
Low : 75ºF
NNE wind 10 to 15 kt. Mostly clear. Seas 1 ft or less.
Sunday
High : 83ºF
NNE wind around 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Sunday Night
Low : 76ºF
NNE wind around 15 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Monday
High : 84ºF
NNE wind 10 to 15 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Monday Night
Low : 76ºF
NNE wind around 15 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Tuesday
High : 84ºF
NE wind 15 to 20 kt. A slight chance of showers. Seas 1 ft or less.
Tuesday Night
Low : 78ºF
NE wind around 25 kt. A slight chance of showers and thunderstorms. Seas 1 ft or less.
Wednesday
High : 84ºF
NE wind 20 to 25 kt. A slight chance of showers. Seas 1 ft or less.
Wednesday Night
Low : 78ºF
NE wind 20 to 25 kt. A slight chance of showers and thunderstorms. Seas 1 ft or less.

NOAA Buoy Data Near Big Coppitt Key, Waltz Key Basin, FL See Map

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    Wind Speed Forecast for Big Coppitt Key, Waltz Key Basin, FL

    SundayMondayTuesday
    Wind Speed (MPH) 161515181820202022252324
    4am8am12pm4pm8pm12am4am8am12pm4pm8pm12am
    MPH 161515181820202022252324
    DIR NNENNNNENNENENNENNENNENENENE

    Current Weather Conditions In Big Coppitt Key, Waltz Key Basin, FL

    As Of: 12 minutes ago

    • 77ºF
    • 77ºF
    • 16mph
    • 0º (NNE)
    • 16mph
    • Clear
    • 10mi
    • 30.00"
    • 65%
    • 0ºF

    The weather right now in Big Coppitt Key, Waltz Key Basin, FL is Clear. The current temperature is 77°F, and the expected high and low for today, Sunday, October 25, 2026, are -° high temperature and 74°F low temperature. The wind is currently blowing at 16 miles per hour, and coming from the North Northeast. The wind is gusting to 16 mph. With the wind and the atmosphere the temperature feels like 77° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 65 percent, and air pressure at 30 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Coastal Flood Advisory - 10:28pm Sat Oct 24 2026

    ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT...

    WHAT: Minor to moderate saltwater flooding.

    WHERE: Middle and Lower Florida Keys.

    WHEN: Until 5 AM EDT Monday.

    IMPACTS: Saltwater flooding of low elevation streets and lots
    is expected. Some storm drains will overflow, and some
    seawalls and docks will be overtopped. Boaters can expect less
    clearance under fixed bridges. Motorists should remember that
    persistent puddles around the times of high tide are almost
    certain to contain a mix of saltwater.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    If travel is required, allow extra time as some roads may be
    closed. Do not drive around barricades or through water of
    unknown depth. Take the necessary actions to protect flood-prone
    property.

    &&

    Small Craft Advisory - 10:15pm Sat Oct 24 2026

    ...SMALL CRAFT ADVISORY IN EFFECT...

    WHAT: Northeast winds 20 to 25 kt with gusts up to 30 kt and
    seas 6 to 9 ft expected, highest seas in the SE Gulf and Straits
    of Florida.

    WHERE: Straits of Florida, Hawk Channel, Gulf waters
    including the Dry Tortugas, and Florida Bay.

    WHEN: In Effect.

    IMPACTS: A Small Craft Advisory means that wind speeds of 20
    to 33 knots, or seas of 7 feet or greater, are expected to
    produce hazardous conditions for small craft. These hazardous
    conditions may result in poor vessel handling and steering
    response, broaching, overturned dinghies and kayaks, slips and
    falls on slippery decks, rub damage along docks and seawalls,
    swamped bows at reef tract mooring balls, and dragging anchors.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced boaters, especially those with smaller vessels,
    should avoid operating in these conditions.

    &&

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