Coastal Flood Advisory
Ends in 10 h 56 min
When
Until 5 AM EDT Sunday, especially at the times of high tide.
Where
Middle and Lower Florida Keys.
Issued for this forecast zone · National Weather Service Key West FL
What, impacts and precautionsHide details
What
Saltwater flooding.
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 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.
Areas: Monroe Middle Keys; Monroe Lower Keys
See it on weather.gov (opens in a new tab)

Observed 5:40 PM EDT at KMTH

Key Colony Beach, FL weather

Mostly sunny and 81°27°.

Forecasts agree

Now 81°27°

Mostly sunny

Wind: 8 mph13 km/h; From the east-northeast. Gusts to 26 mph42 km/h around 10 PM
Dew point: 66°19°; Muggy
UV tomorrow: 7High; High 12–4 PM · peak 7

Light rain now, through the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Dry until tomorrow 2 PM
Gusts to 26 mph42 km/h tonight 8 PM–6 AM
Rain tomorrow from 2 PM (50%, 1.9 in48 mm)
Gusts to 25 mph40 km/h tomorrow 2–3 PM
Gusts to 37 mph60 km/h tomorrow from 5 PM

TonightDown to 74°23° by 5 AM · rain chance 20% · gusts to 26 mph42 km/h · Clear
Tomorrow morningNear 76°24° · rain chance 40% · Clear
Tomorrow afternoonUp to 82°28° by 5 PM · Rain 2–6 PM (40%) · gusts to 26 mph42 km/h
Tomorrow nightDown to 76°24° by 4 AM · Rain all night (50%) · gusts to 33 mph53 km/h
Monday morningNear 78°26° · Rain all morning (50%) · gusts to 37 mph60 km/h
Monday afternoonNear 81°27° · Rain all afternoon (50%) · gusts to 37 mph60 km/h

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 6p	Sunny	81°27° (likely 80°27° to 82°28°)	84°29°	20%	10 mph16 km/h from NE, gusts 20 mph33 km/h	67%	34%	1
Sat 7p	Showers	80°27° (likely 79°26° to 81°27°)	83°28°	20%	10 mph16 km/h from NE, gusts 22 mph36 km/h	69%	71%	0
Sat 8p	Mostly clear	80°27° (likely 78°26° to 81°27°)	83°28°	10%	15 mph24 km/h from NE, gusts 25 mph41 km/h	69%	35%	0
Sat 9p	Clear	79°26° (likely 78°26° to 80°27°)	79°26°	10%	15 mph24 km/h from NE, gusts 25 mph41 km/h	72%	5%	0
Sat 10p	Clear	79°26° (likely 77°25° to 79°26°)	79°26°	10%	15 mph24 km/h from NE, gusts 26 mph42 km/h	72%	2%	0
Sat 11p	Clear	78°26° (likely 76°24° to 79°26°)	78°26°	10%	15 mph24 km/h from N, gusts 26 mph42 km/h	74%	1%	0
Sun 12a	Clear	77°25° (likely 75°24° to 78°26°)	77°25°	10%	15 mph24 km/h from N, gusts 25 mph41 km/h	76%	1%	0
Sun 1a	Clear	77°25° (likely 74°23° to 77°25°)	77°25°	10%	15 mph24 km/h from N, gusts 26 mph42 km/h	76%	1%	0
Sun 2a	Clear	76°24° (likely 74°23° to 77°25°)	76°24°	10%	15 mph24 km/h from N, gusts 25 mph41 km/h	82%	0%	0
Sun 3a	Clear	75°24° (likely 73°23° to 76°24°)	75°24°	10%	15 mph24 km/h from N, gusts 26 mph41 km/h	84%	1%	0
Sun 4a	Clear	75°24° (likely 73°23° to 76°24°)	75°24°	10%	15 mph24 km/h from N, gusts 25 mph41 km/h	84%	2%	0
Sun 5a	Clear	74°23° (likely 73°23° to 75°24°)	74°23°	10%	15 mph24 km/h from N, gusts 25 mph41 km/h	90%	5%	0
Sun 6a	Clear	74°23° (likely 73°23° to 75°24°)	74°23°	10%	15 mph24 km/h from N, gusts 24 mph39 km/h	90%	9%	0
Sun 7a	Sunny	74°23° (likely 73°23° to 75°24°)	74°23°	10%	15 mph24 km/h from N, gusts 23 mph37 km/h	93%	12%	0
Sun 8a	Sunny	74°23° (likely 73°23° to 75°24°)	74°23°	40%	10 mph16 km/h from N, gusts 22 mph35 km/h	93%	11%	0
Sun 9a	Sunny	75°24° (likely 75°24° to 76°24°)	75°24°	40%	10 mph16 km/h from N, gusts 22 mph36 km/h	90%	16%	1
Sun 10a	Sunny	75°24° (likely 75°24° to 77°25°)	75°24°	40%	10 mph16 km/h from N, gusts 22 mph36 km/h	90%	26%	3
Sun 11a	Sunny	77°25° (likely 77°25° to 79°26°)	77°25°	40%	10 mph16 km/h from N, gusts 22 mph35 km/h	88%	31%	4
Sun 12p	Mostly sunny	78°26° (likely 78°26° to 81°27°)	78°26°	40%	10 mph16 km/h from N, gusts 22 mph35 km/h	82%	42%	6
Sun 1p	Mostly sunny	79°26° (likely 78°26° to 82°28°)	79°26°	40%	10 mph16 km/h from N, gusts 21 mph33 km/h	79%	27%	7
Sun 2p	Rain	81°27° (likely 74°23° to 81°27°)	85°29°	40%, 0.18 in4.6 mm	20 mph32 km/h from NE, gusts 25 mph41 km/h	74%	52%	7
Sun 3p	Partly sunny	81°27° (likely 79°26° to 81°27°)	85°29°	40%, 0.18 in4.6 mm	20 mph32 km/h from NE, gusts 23 mph38 km/h	74%	40%	6
Sun 4p	Sunny	81°27° (likely 79°26° to 81°27°)	86°30°	40%, 0.18 in4.6 mm	20 mph32 km/h from NE, gusts 25 mph40 km/h	77%	12%	5
Sun 5p	Cloudy	82°28° (likely 77°25° to 82°28°)	87°31°	40%, 0.18 in4.6 mm	15 mph24 km/h from NE, gusts 26 mph42 km/h	74%	53%	3
Sun 6p	Cloudy	81°27° (likely 77°25° to 81°27°)	86°30°	40%, 0.18 in4.6 mm	15 mph24 km/h from NE, gusts 29 mph47 km/h	77%	57%	1
Sun 7p	Partly cloudy	81°27° (likely 76°24° to 81°27°)	86°30°	40%, 0.18 in4.6 mm	15 mph24 km/h from NE, gusts 31 mph50 km/h	77%	46%	0
Sun 8p	Clear	81°27° (likely 74°23° to 81°27°)	86°30°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 32 mph51 km/h	77%	17%	0
Sun 9p	Clear	79°26° (likely 75°24° to 79°26°)	79°26°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 33 mph52 km/h	82%	25%	0
Sun 10p	Mostly clear	79°26° (likely 74°23° to 79°26°)	79°26°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 32 mph52 km/h	82%	24%	0
Sun 11p	Cloudy	78°26° (likely 74°23° to 78°26°)	78°26°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 32 mph51 km/h	88%	62%	0
Mon 12a	Partly cloudy	78°26° (likely 73°23° to 78°26°)	78°26°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 31 mph49 km/h	88%	58%	0
Mon 1a	Cloudy	77°25° (likely 72°22° to 78°26°)	77°25°	50%, 0.03 in0.8 mm	15 mph24 km/h from NE, gusts 28 mph44 km/h	90%	76%	0
Mon 2a	Drizzle	77°25° (likely 73°23° to 77°25°)	77°25°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 26 mph43 km/h	90%	75%	0
Mon 3a	Partly cloudy	77°25° (likely 74°23° to 78°26°)	77°25°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 29 mph47 km/h	90%	66%	0
Mon 4a	Clear	76°24° (likely 73°23° to 78°26°)	76°24°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 29 mph47 km/h	90%	35%	0
Mon 5a	Cloudy	76°24° (likely 73°23° to 77°25°)	76°24°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 30 mph48 km/h	90%	67%	0
Mon 6a	Mostly clear	76°24° (likely 73°23° to 78°26°)	76°24°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 30 mph48 km/h	94%	34%	0
Mon 7a	Cloudy	75°24° (likely 73°23° to 77°25°)	75°24°	50%, 0.04 in1 mm	15 mph24 km/h from N, gusts 30 mph49 km/h	97%	65%	0
Mon 8a	Mostly sunny	76°24° (likely 73°23° to 77°25°)	76°24°	50%, 0.02 in0.5 mm	15 mph24 km/h from N, gusts 29 mph47 km/h	94%	36%	0
Mon 9a	Cloudy	77°25° (likely 75°24° to 78°26°)	77°25°	50%, 0.02 in0.5 mm	15 mph24 km/h from N, gusts 31 mph49 km/h	90%	64%	1
Mon 10a	Mostly sunny	78°26° (likely 75°24° to 78°26°)	78°26°	50%, 0.02 in0.5 mm	15 mph24 km/h from N, gusts 29 mph47 km/h	88%	39%	3
Mon 11a	Mostly sunny	79°26° (likely 76°24° to 79°26°)	79°26°	50%, 0.02 in0.5 mm	15 mph24 km/h from NE, gusts 37 mph59 km/h	85%	41%	4
Mon 12p	Partly sunny	80°27° (likely 77°25° to 80°27°)	85°29°	50%, 0.02 in0.5 mm	15 mph24 km/h from NE, gusts 37 mph59 km/h	82%	44%	6
Mon 1p	Partly sunny	81°27° (likely 78°26° to 81°27°)	86°30°	50%, 0.02 in0.5 mm	15 mph24 km/h from NE, gusts 33 mph53 km/h	79%	37%	7
Mon 2p	Cloudy	82°28° (likely 77°25° to 82°28°)	88°31°	50%, 0.07 in1.8 mm	15 mph24 km/h from NE, gusts 31 mph50 km/h	77%	43%	7
Mon 3p	Drizzle	82°28° (likely 77°25° to 82°28°)	88°31°	50%, 0.07 in1.8 mm	15 mph24 km/h from NE, gusts 32 mph52 km/h	77%	28%	6
Mon 4p	Drizzle	82°28° (likely 77°25° to 82°28°)	88°31°	50%, 0.07 in1.8 mm	15 mph24 km/h from NE, gusts 33 mph53 km/h	77%	24%	5
Mon 5p	Sunny	82°28° (likely 77°25° to 82°28°)	88°31°	50%, 0.07 in1.8 mm	15 mph24 km/h from NE, gusts 34 mph54 km/h	77%	23%	3

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 82°28°, low 74°23°. Typical 85°29° / 74°23°. Rain 0.1 in2.5 mm, 70% chance. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 80°27°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 74°23°
  Dry
Official NWS forecast
Tonight: A slight chance of rain showers before 8pm. Mostly clear, with a low around 74. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
81°27°–83°28°
Low, likely
74°23°–76°24°
Typical high / low
85°29° / 74°23°
Wind
23 mph37 km/h, gusts 31 mph50 km/h
UV peak
6
Tomorrow, Oct 25. Thunderstorms. High 83°28°, low 75°24°. Typical 85°29° / 74°23°. Storms 0.06 in1.5 mm, 40% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 74°23°
  40% chance
2. Afternoon
  noon–6 PM
  Rain, 82°28°
  40% chance · 0.72 in18 mm
3. Evening
  6 PM–midnight
  Clear, 81°27°
  50% chance · 0.48 in12 mm
4. Overnight
  midnight–6 AM
  Drizzle, 76°24°
  50% chance · 0.22 in5.6 mm
Official NWS forecast
Day: A chance of showers and thunderstorms after 8am. Sunny, with a high near 83. Northeast wind 10 to 20 mph. Chance of precipitation is 40%.
Night: A chance of showers and thunderstorms. Mostly clear, with a low around 75. Northeast wind around 15 mph. Chance of precipitation is 50%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
80°27°–83°28°
Low, likely
73°23°–75°24°
Typical high / low
85°29° / 74°23°
Wind
29 mph47 km/h, gusts 36 mph58 km/h
UV peak
7
Monday, Oct 26. Thunderstorms. High 83°28°, low 76°24°. Typical 84°29° / 74°23°. Storms 0.13 in3.3 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 76°24°
  50% chance · 0.16 in4.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 82°28°
  50% chance · 0.32 in8.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 79°26°
  30% chance · 0.04 in1 mm
4. Overnight
  midnight–6 AM
  Mostly clear, 77°25°
  30% chance · 0.01 in0.3 mm
Official NWS forecast
Day: A chance of showers and thunderstorms. Sunny, with a high near 83. Northeast wind around 15 mph. Chance of precipitation is 50%.
Night: A chance of showers and thunderstorms. Mostly clear, with a low around 76. Northeast wind around 15 mph. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
78°26°–83°28°
Low, likely
74°23°–77°25°
Typical high / low
84°29° / 74°23°
Wind
30 mph47 km/h, gusts 40 mph65 km/h
UV peak
7
Tuesday, Oct 27. Thunderstorms. High 84°29°, low 78°26°. Typical 84°29° / 74°23°. Storms 0.08 in2 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 77°25°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 80°27°
  30% chance · 0.03 in0.7 mm
3. Evening
  6 PM–midnight
  Drizzle, 79°26°
  30% chance · 0.03 in0.8 mm
4. Overnight
  midnight–6 AM
  Clear, 79°26°
  30% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of showers and thunderstorms. Sunny, with a high near 84. Chance of precipitation is 40%.
Night: A chance of showers and thunderstorms. Mostly clear, with a low around 78. Chance of precipitation is 30%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–84°29°
Low, likely
75°24°–78°26°
Typical high / low
84°29° / 74°23°
Wind
28 mph46 km/h, gusts 36 mph57 km/h
UV peak
7
Wednesday, Oct 28. Thunderstorms. High 83°28°, low 78°26°. Typical 84°29° / 74°23°. Storms 0.06 in1.5 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 79°26°
  30% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Sunny, 81°27°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 80°27°
  40% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Clear, 80°26°
  50% chance · 0.01 in0.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of showers and thunderstorms. Sunny, with a high near 83. Chance of precipitation is 30%.
Night: A slight chance of rain showers before 8pm, then a slight chance of showers and thunderstorms. Mostly clear, with a low around 78. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–83°28°
Low, likely
76°24°–80°27°
Typical high / low
84°29° / 74°23°
Wind
27 mph44 km/h
UV peak
7
Thursday, Oct 29. Thunderstorms. High 84°29°, low 78°26°. Typical 84°29° / 74°23°. Storms 0.06 in1.5 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 79°26°
  30% chance · 0.03 in0.8 mm
2. Afternoon
  noon–6 PM
  Sunny, 81°27°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 81°27°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 79°26°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of showers and thunderstorms. Sunny, with a high near 84. Chance of precipitation is 20%.
Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 78. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–84°29°
Low, likely
77°25°–80°27°
Typical high / low
84°29° / 74°23°
Wind
17 mph28 km/h, gusts 27 mph44 km/h
UV peak
7
Friday, Oct 30. Thunderstorms. High 83°28°, low 78°26°. Typical 84°29° / 73°23°. Storms 0.06 in1.5 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 79°26°
  30% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 80°27°
  20% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Clear, 80°27°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 79°26°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of showers and thunderstorms. Sunny, with a high near 83. Chance of precipitation is 20%.
Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 78. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–83°28°
Low, likely
76°24°–80°27°
Typical high / low
84°29° / 73°23°
Wind
19 mph30 km/h, gusts 24 mph38 km/h
UV peak
6
Saturday, Oct 31. Showers. High 84°29°, low 79°26°. Typical 84°29° / 73°23°. Rain 0.04 in1 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 79°26°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 81°27°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 81°27°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 79°26°
  20% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Sunny, with a high near 84. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
78°26°–84°29°
Low, likely
74°23°–82°28°
Typical high / low
84°29° / 73°23°
Wind
18 mph28 km/h, gusts 24 mph38 km/h
UV peak
6
Sunday, Nov 1. Sunny. High 80°27°, low 78°26°. Typical 83°28° / 73°23°. Rain 0.06 in1.5 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 78°25°
  20% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Sunny, 79°26°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 79°26°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 78°25°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–82°28°
Low, likely
72°22°–80°27°
Typical high / low
83°28° / 73°23°
Wind
16 mph26 km/h, gusts 23 mph36 km/h
UV peak
6
Monday, Nov 2. Drizzle. High 80°27°, low 78°26°. Typical 83°28° / 73°23°. Rain 0.07 in1.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 78°26°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 79°26°
  Dry
3. Evening
  6 PM–midnight
  Clear, 79°26°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–82°28°
Low, likely
74°23°–80°27°
Typical high / low
83°28° / 73°23°
Wind
14 mph22 km/h
UV peak
6

10 days15 days30 days

The outlook

Today
Dry, high 82°, low 74°.
Tomorrow
38% chance of rain, high 83°, low 75°.
Monday
49% chance of rain, high 83°, low 76°.
Rest of week
Mostly dry, highs 80–84°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (KEY) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Cooling this week

About 74% less cooling than a typical week.

This week 26Typical 99

Cooling degree days, base 65°F

Comfort

Sticky, humid air (dew point 66°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Marathon Airport · official normals 1991–2020 · records 1998–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

±0°SunOct 18
+1°MonOct 19
−1°TueOct 20
−1°WedOct 21
−1°ThuOct 22
−2°−1°FriOct 23
—SatOct 24

Key Colony Beach weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 23 min; Losing 1 min 20 s a day; shortest Dec 21, 47 min less
Golden hour: 6:18–7:03 PM; Morning 7:12–7:57 AM
Blue hour: 7:03–7:12 PM; Morning 7:03–7:12 AM; first light 7:03 AM

Stars tonight? Fair

Mostly clear 9 PM–7:03 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:47 AM · rises 5:42 PM
Full moon: Oct 26
New moon: Nov 9

Looking south from Key Colony Beach. Open water to the horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Coastal Flood Advisory