Weather in Big Coppitt Key

14-day forecast · updated today, Wednesday, October 28, at 8:12 pm (EDT)

Now · light drizzle 79 °F

Feels like: 85 °F
Low / high: 75 / 85 °F
Rain: 13%
Wind: 10 mph ENE

↗ 29.91 inHg · rising UV 7 · high

Today in Big Coppitt Key: drizzle, 75 °F to 85 °F, with a 13% chance of rain and a gentle breeze from the east-northeast (10 mph). Tomorrow, light drizzle, 77 °F to 83 °F and a 7% chance of rain. The warmest day of the week is Wednesday 28, at 85 °F. Next likely rain: Sunday 1 (39%).

Measured now at the airport

Key West (KNQX), 1.8 mi away · 19 min ago

Visibility9.9 mi or more

WeatherNothing to note

Temperature80 °F

Wind6 mph from the north-northeast

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

85° 75°
Today
83° 77°
Thu 29
82° 78°
Fri 30
83° 79°
Sat 31
82° 79°
Sun 1
81° 78°
Mon 2
82° 78°
Tue 3
82° 78°
Wed 4
81° 78°
Thu 5
80° 77°
Fri 6
79° 76°
Sat 7
79° 76°
Sun 8
77° 75°
Mon 9
76° 75°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 28	Drizzle	75 / 85 °F	13%	23 mph NNE	3.3 ft	12:58 am · 2:40 pm	HRRR
Thu 29	Light drizzle	77 / 83 °F	7%	12 mph NE	2.3 ft	1:39 am · 3:36 pm	HRRR + NBM
Fri 30	Light drizzle	78 / 82 °F	15%	14 mph NE	2.2 ft	2:26 am · 4:41 pm	NBM
Sat 31	Light drizzle	79 / 83 °F	21%	14 mph ENE	1.6 ft	3:25 am · 5:54 pm	NBM
Sun 1	Light showers	79 / 82 °F	39% · 0.06 in	13 mph ENE	2.5 ft	3:44 am · 6:07 pm	NBM
Mon 2	Light showers	78 / 81 °F	39% · 0.06 in	12 mph NE	2.8 ft	5:21 am · 7:08 pm	NBM
Tue 3	Light drizzle	78 / 82 °F	13%	13 mph NNE	2.9 ft	6:51 am · 7:55 pm	NBM
Wed 4	Light drizzle	78 / 82 °F	9%	10 mph ENE	1.7 ft	8:06 am · 8:34 pm	NBM
Thu 5	Light drizzle	78 / 81 °F	15%	11 mph SW	1.0 ft	9:07 am · 9:10 pm	NBM
Fri 6	Drizzle	77 / 80 °F	15% · 0.02 in	11 mph WNW	3.7 ft	9:59 am · 9:42 pm	NBM
Sat 7	Light drizzle	76 / 79 °F	10%	12 mph NNE	4.1 ft	10:45 am · 10:14 pm	NBM
Sun 8	Light drizzle	76 / 79 °F	19%	15 mph NNE	3.6 ft	11:27 am · 10:44 pm	NBM + ECMWF
Mon 9	Light drizzle	75 / 77 °F	27% · 0.02 in	15 mph N	2.1 ft	12:06 pm · 11:13 pm	ECMWF
Tue 10	Overcast	75 / 76 °F	27%	10 mph N	1.4 ft	12:44 pm · 11:42 pm	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 3:00 pm; then NBM until Sunday 8 2:00 pm; then ECMWF until Thursday 12 10:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Light drizzle	Drizzle	Light drizzle	Overcast	Light drizzle	Mainly clear	Clear sky	Light drizzle
Temperature	75°	76°	77°	78°	81°	84°	82°	79°
Chance of rain	13%	4%	10%	8%	7%	1%	1%	1%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	21 N	18 NNE	16 NNE	13 NNE	13 NNE	9 NNE	12 NNE	11 ENE
Humidity	89%	88%	87%	90%	85%	82%	81%	85%
UV	0	0	0	1	6	5	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain today: take it with some caution.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	82°	81°	81°	82°	81°	79°	80°
AIFS	82°	82°	82°	82°	80°	77°	79°
GFS	80°	80°	80°	80°	80°	80°	80°
ICON	82°	81°	82°	81°	80°	81°	80°
HRRR	85°	83°	—	—	—	—	—
NBM	82°	82°	82°	83°	82°	81°	82°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	0.17 in	0.11 in	0.07 in	0.06 in	0.33 in	0.38 in	0.02 in
AIFS	0.05 in	0.05 in	0.07 in	0.09 in	0.65 in	1.35 in	0.48 in
GFS	0	0	0.15 in	0.02 in	0.23 in	0	0.06 in
ICON	0	0	0	0.02 in	0.19 in	0.32 in	0.28 in
HRRR	0	0	—	—	—	—	—
NBM	0.01 in	0	0	0	0.06 in	0.06 in	0
Confidence	medium	medium	medium	medium	medium	medium	low

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	2536	1723	1420	1621	1722	1417	1327
AIFS	22	14	12	15	16	16	13
GFS	2527	1617	1517	1618	1315	89	89
ICON	1728	1118	1016	1321	1321	1324	818
HRRR	2332	1219	—	—	—	—	—
NBM	2529	1519	1417	1418	1317	1215	1315
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	92%	80%	47%	51%	58%	57%	25%
GFS (GEFS, 31 scenarios)	29%	13%	45%	36%	35%	26%	16%
NBM (NOAA)	13%	7%	15%	21%	39%	39%	13%
Thunderstorm (NBM)	2%	4%	17%	17%	33%	23%	15%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: normal temperatures, normal rain and a slightly warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +2.0 °F	A bit below −35%	A bit above +1.6 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.2 °F	A bit above +37%	A bit above +0.9 °F	78° / 75°
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.5 °F	A bit above +36%	Normal 0.0 °F	78° / 76°
Nov 23 – Nov 29Nov 23–Nov 29	Normal +0.7 °F	A bit above +27%	Normal +0.4 °F	77° / 75°
Nov 30 – Dec 6Nov 30–Dec 6	Normal +0.5 °F	A bit above +42%	Normal +0.4 °F	76° / 74°

Coming months

When	TemperatureTemp.	Rain	Sea
November	A bit above +1.8 °F	A bit above +30%	Above +2.2 °F
December	A bit above +0.9 °F	Well above +102%	Above +1.8 °F
January	Normal −0.4 °F	Well above +190%	A bit above +0.5 °F
February	Normal −0.4 °F	Well above +152%	Normal 0.0 °F
March	Normal −0.7 °F	Well above +168%	A bit below −0.7 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Big Coppitt Key climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Big Coppitt Key is from November to April: highs of 75 °F to 82 °F, about 4 rainy days a month and 7 hours of sunshine a day.

Hurricane season: from August to September, peaking in September. In the last 30 years (1996–2025), 16 tropical cyclones passed within 93 mi of Big Coppitt Key, about 5 every 10 years; 8 of them with hurricane-force winds (74 mph or more). The most recent: Ian, in September 2022.

75° 64°

JanJ
76° 66°

FebF
79° 68°

MarM
82° 72°

AprA
85° 75°

MayM
88° 79°

JunJ
90° 80°

JulJ
90° 80°

AugA
89° 79°

SepS
85° 76°

OctO
80° 71°

NovN
77° 67°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	75°	64°	2.14 in	5	6.3	73°	3.1 ft	–
FebruaryFeb	76°	66°	1.40 in	3	6.9	73°	2.7 ft	–
MarchMar	79°	68°	1.38 in	4	7.8	75°	2.8 ft	–
AprilApr	82°	72°	2.15 in	5	8.1	77°	2.4 ft	–
MayMay	85°	75°	4.19 in	10	8.4	80°	2.4 ft	–
JuneJun	88°	79°	5.16 in	19	7.0	83°	1.9 ft	–
JulyJul	90°	80°	3.37 in	19	8.0	85°	1.8 ft	1
AugustAug	90°	80°	5.74 in	21	7.2	86°	1.9 ft	5
SeptemberSep	89°	79°	5.56 in	21	6.3	85°	1.8 ft	7
OctoberOct	85°	76°	5.06 in	13	6.0	83°	2.7 ft	2
NovemberNov	80°	71°	1.45 in	5	6.6	79°	3.0 ft	1
DecemberDec	77°	67°	1.90 in	5	5.9	76°	2.9 ft	–

Month	Water	Waves	Cyclones
Jan	73°	3.1 ft	–
Feb	73°	2.7 ft	–
Mar	75°	2.8 ft	–
Apr	77°	2.4 ft	–
May	80°	2.4 ft	–
Jun	83°	1.9 ft	–
Jul	85°	1.8 ft	1
Aug	86°	1.9 ft	5
Sep	85°	1.8 ft	7
Oct	83°	2.7 ft	2
Nov	79°	3.0 ft	1
Dec	76°	2.9 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 39.50 in of rain on about 131 days and about 2,550 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now79 °Ffeels like 85 °F

Tomorrow77 / 83 °F

It's 79 °F now (feels like 85 °F). Today, 75 °F to 85 °F; tomorrow, 77 °F to 83 °F.

Chance of rain

Today 13%
Thu 29 7%
Fri 30 15%
Sat 31 21%
Sun 1 39% 0.06 in
Mon 2 39% 0.06 in
Tue 3 13%

Today the chance of rain reaches 13%. The next day with likely rain is Sunday 1: 39% and 0.06 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.09 in; last 7 days, 0.90 in.

Humidity and dew point

Humidity83%

Dew point74 °F

Humidity is 83% now and the dew point is 74 °F. With a dew point this high, it feels muggy.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now9.9 migood

Clouds27%

Visibility is good now (9.9 mi). No fog expected today.

UV index

Now0

Today's peak7high

Thu 29: 7 · Fri 30: 7 · Sat 31: 7

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising · now Anglers say fish bite less for a while
→ Steady Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8029.9030.00 29.99

Rising now (+0.05 inHg in 3 hours). Over the next 48 hours: +0.04 inHg. Rising pressure: anglers say fish bite less for a while. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 36

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Tue 27	Light drizzle	78 / 82 °F	0.04 in	26 mph NNE
Mon 26	Light drizzle	77 / 83 °F	0.05 in	26 mph NNE
Sun 25	Drizzle	78 / 80 °F	0.22 in	27 mph NNE
Sat 24	Drizzle	74 / 82 °F	0.14 in	22 mph NE
Fri 23	Light showers	76 / 81 °F	0.44 in	19 mph NE
Thu 22	Light drizzle	78 / 81 °F	0.05 in	16 mph NNE
Wed 21	Overcast	78 / 81 °F	0	20 mph NE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Light drizzle	79 / 82 °F	0.08 in	24 mph NE
Mon 19	Drizzle	80 / 84 °F	0.25 in	26 mph ENE
Sun 18	Showers	80 / 83 °F	1.42 in	28 mph ENE
Sat 17	Heavy drizzle	81 / 87 °F	0.18 in	17 mph NE
Fri 16	Light drizzle	83 / 86 °F	0.09 in	14 mph ESE
Thu 15	Heavy drizzle	83 / 85 °F	0.25 in	18 mph ESE
Wed 14	Light showers	78 / 85 °F	0.32 in	18 mph ENE
Tue 13	Drizzle	80 / 85 °F	0.21 in	15 mph ENE
Mon 12	Light drizzle	84 / 86 °F	0.01 in	13 mph NE
Sun 11	Light showers	82 / 87 °F	0.33 in	13 mph ESE
Sat 10	Drizzle	83 / 85 °F	0.20 in	19 mph SSE
Fri 9	Light drizzle	84 / 86 °F	0.05 in	18 mph SSE
Thu 8	Light drizzle	82 / 86 °F	0.04 in	15 mph S
Wed 7	Drizzle	81 / 85 °F	0.28 in	12 mph SSW
Tue 6	Light drizzle	82 / 86 °F	0.04 in	11 mph SSE
Mon 5	Light drizzle	84 / 86 °F	0.04 in	14 mph SE
Sun 4	Overcast	84 / 86 °F	0	20 mph ESE
Sat 3	Light drizzle	82 / 87 °F	0.04 in	20 mph ESE
Fri 2	Thunderstorm	83 / 86 °F	0.38 in	20 mph ESE
Thu 1	Thunderstorm	80 / 86 °F	0.51 in	23 mph ESE
Wed 30	Light showers	78 / 84 °F	0.54 in	19 mph ESE
Tue 29	Showers	79 / 84 °F	0.72 in	16 mph SE
Mon 28	Light showers	78 / 85 °F	0.27 in	18 mph WSW

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in Big Coppitt KeyQuestions

What's the weather like today in Big Coppitt Key?

Drizzle, from 75 °F to 85 °F, with a gentle breeze from the east-northeast (10 mph) and a 13% chance of rain.

Will it rain tomorrow in Big Coppitt Key?

On Thursday 29 the chance of rain is 7% (0.00 in): light drizzle.

How warm will it be this week?

Between a low of 75 °F and a high of 85 °F; the warmest day, Wednesday 28.

What's the UV index today?

It reaches 7 (high). Sunscreen, hat and shade between 12 and 4 pm.

Is the pressure rising or falling?

It's 29.91 inHg and rising: +0.00 inHg over the last 24 hours.

When is the best time to visit Big Coppitt Key?

The best time to visit Big Coppitt Key is from November to April: highs of 75 °F to 82 °F, about 4 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Big Coppitt Key in October?

In October, Big Coppitt Key normally sees highs of 85 °F and lows of 76 °F, with about 13 rainy days (5.06 in for the month) and 6 hours of sunshine a day. The sea is around 83 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Big Coppitt Key?

The warmest is August, with average highs of 90 °F, and the coldest January, with lows of 64 °F. The wettest is August (5.74 in) and the driest, March.

When is hurricane season in Big Coppitt Key?

Hurricane season: from August to September, peaking in September. In the last 30 years (1996–2025), 16 tropical cyclones passed within 93 mi of Big Coppitt Key, about 5 every 10 years; 8 of them with hurricane-force winds (74 mph or more). The most recent: Ian, in September 2022.

More about Big Coppitt Key today

Weather near Big Coppitt Key

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 8.7 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 8:12 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from