Grassy Key, FL Weather Forecast & Current Conditions

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Grassy Key, FL Weather Maps

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Grassy Key Weather Map
UTC Time: 9/22/2026, 01:39
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Grassy Key, FL Regional Weather

Expires:202609220200;;846104
ASUS42 KTBW 220110
RWRFL 
FLORIDA REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
900 PM EDT MON SEP 21 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.


FLZ066-069-070-075>078-162-262-165-265-220200-
SOUTHWEST FLORIDA AND KEYS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PUNTA GORDA    PTCLDY    76  74  93 E3        29.91R                  
FT MYERS       PTCLDY    77  74  90 E5        29.89R                  
SOUTHWEST INTL CLEAR     76  74  93 E5        29.90R                  
NAPLES         PTCLDY    80  74  81 E12       29.89R                  
MARCO ISLAND   PTCLDY    77  75  93 E5        29.90R                  
MARATHON       HVY RAIN  79  75  87 S5G30     29.90R FOG              
KEY WEST NAS   MOCLDY    82  73  74 SE8       29.89R                  
KEY WEST INTL  MOCLDY    82  76  81 S10       29.89R                  

STATION/POSITION SKY/WX   TEMP    WIND        PRES    WAVE   SWELL
                          AIR SEA DIR/SP/G            HT/PER HT/PER
                          (F)     (DEG/KT/KT) (MB)    (FT/S) (FT/S)
NAPLES           NOT AVBL
DRY TORTUGAS     NOT AVBL
SAND KEY                   82     170/ 11/ 15 1012.0R
SOMBRERO KEY               79      90/ 11/ 14 1012.5R
LONG KEY                   85     160/  9/ 12 1011.2R

$$

SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Grassy Key, FL

Tonight
Thunderstorms
80°27°
60%
Tuesday
Thunderstorms
88°/ 80° 31°/ 27°
70%
Wednesday
Thunderstorms
88°/ 78° 31°/ 26°
80%
Thursday
Thunderstorms
88°/ 80° 31°/ 27°
60%
Friday
Thunderstorms
88°/ 80° 31°/ 27°
60%
Sat Night
Thunderstorms
78°26°
50%
Sunday
Thunderstorms
88°/ 78° 31°/ 26°
60%
Monday
Thunderstorms
88°31°
60%

Night: Showers likely with a chance of thunderstorms. Lows near 80. South to southwest winds 5 to 10 mph, becoming southeast to south 10 to 15 mph. Chance of rain 60 percent.

Key Largo, FL

Tonight
Thunderstorms
80°27°
60%
Tuesday
Thunderstorms
88°/ 80° 31°/ 27°
70%
Wednesday
Thunderstorms
88°/ 78° 31°/ 26°
80%
Thursday
Thunderstorms
88°/ 80° 31°/ 27°
60%
Friday
Thunderstorms
88°/ 80° 31°/ 27°
60%
Sat Night
Thunderstorms
78°26°
50%
Sunday
Thunderstorms
88°/ 78° 31°/ 26°
60%
Monday
Thunderstorms
88°31°
60%

Night: Showers likely with a chance of thunderstorms. Lows near 80. South to southwest winds 5 to 10 mph, becoming southeast to south 10 to 15 mph. Chance of rain 60 percent.

Northwest Cape Sable, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
90%
Thursday
Thunderstorms
90°/ 75° 32°/ 24°
70%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Saturday
Thunderstorms
88°/ 72° 31°/ 22°
60%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
60%
Monday
Thunderstorms
88°31°
60%

Night: Partly cloudy with a chance of showers. A chance of thunderstorms, mainly this evening. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 50 percent.

Fortymile Bend, FL

Tonight
Thunderstorms
75°24°
40%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
90%
Thursday
Thunderstorms
90°/ 75° 32°/ 24°
70%
Friday
Thunderstorms
90°/ 72° 32°/ 22°
70%
Saturday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
60%
Monday
Thunderstorms
88°31°
60%

Night: Partly cloudy. A chance of showers and thunderstorms, mainly this evening. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 40 percent.

Hialeah, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 78° 31°/ 26°
90%
Thursday
Thunderstorms
88°/ 75° 31°/ 24°
80%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
80%
Saturday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
60%
Monday
Thunderstorms
88°31°
60%

Night: Partly cloudy. A chance of showers and thunderstorms, mainly this evening. Lows in the mid 70s. South winds around 5 mph. Chance of rain 50 percent.

Miami, FL

Tonight
Thunderstorms
78°26°
50%
Tuesday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Wednesday
Thunderstorms
88°/ 78° 31°/ 26°
90%
Thursday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Saturday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Sunday
Thunderstorms
88°/ 75° 31°/ 24°
60%
Monday
Thunderstorms
88°31°
70%

Night: Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. South winds 5 to 10 mph. Chance of rain 50 percent.

Bonita Shores, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Thursday
Thunderstorms
92°/ 75° 33°/ 24°
70%
Friday
Thunderstorms
90°/ 75° 32°/ 24°
50%
Saturday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Monday
Thunderstorms
88°31°
50%

Night: Partly cloudy with a chance of showers. A chance of thunderstorms, mainly this evening. Lows in the mid 70s. Southeast winds 5 to 10 mph. Chance of rain 50 percent.

Golden Gate, FL

Tonight
Thunderstorms
72°22°
50%
Tuesday
Thunderstorms
90°/ 75° 32°/ 24°
70%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
90%
Thursday
Thunderstorms
92°/ 72° 33°/ 22°
70%
Friday
Thunderstorms
90°/ 72° 32°/ 22°
70%
Saturday
Thunderstorms
90°/ 72° 32°/ 22°
50%
Sunday
Thunderstorms
88°/ 68° 31°/ 20°
50%
Monday
Thunderstorms
88°31°
50%

Night: Partly cloudy. A chance of showers and thunderstorms this evening, then a slight chance of showers after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 50 percent.

Hollywood, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
90%
Thursday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Saturday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Sunday
Thunderstorms
85°/ 72° 29°/ 22°
50%
Monday
Thunderstorms
85°29°
50%

Night: Mostly cloudy with a chance of showers and thunderstorms this evening, then mostly clear with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 50 percent.

Fort Lauderdale, FL

Tonight
Thunderstorms
78°26°
50%
Tuesday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
90%
Thursday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Friday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Saturday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Sunday
Thunderstorms
85°/ 75° 29°/ 24°
50%
Monday
Thunderstorms
85°29°
60%

Night: Mostly cloudy this evening, then clearing. A chance of showers and thunderstorms. Near steady temperature in the upper 70s. South winds 5 to 10 mph. Chance of rain 50 percent.

Miccosukee Indian Reservation, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
80%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
90%
Thursday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Saturday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Monday
Thunderstorms
88°31°
50%

Night: Mostly cloudy with a chance of showers and thunderstorms this evening, then mostly clear after midnight. Near steady temperature in the mid 70s. Southeast winds around 5 mph. Chance of rain 50 percent.

Cape Coral, FL

Tonight
Thunderstorms
78°26°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
50%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Thursday
Thunderstorms
92°/ 75° 33°/ 24°
60%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
50%
Sat-Sat Night
Thunderstorms
88°31°
40%
Sunday
Thunderstorms
88°/ 72° 31°/ 22°
30%
Monday
Thunderstorms
88°31°
40%

Night: Partly cloudy with scattered showers and thunderstorms. Lows in the upper 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Felda, FL

Tonight
Thunderstorms
72°22°
50%
Tuesday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
90%
Thursday
Thunderstorms
90°/ 72° 32°/ 22°
60%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Saturday
Thunderstorms
88°/ 68° 31°/ 20°
50%
Sunday
Thunderstorms
85°/ 68° 29°/ 20°
40%
Monday
Thunderstorms
85°29°
50%

Night: Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. East winds around 5 mph this evening, becoming light and variable. Chance of rain 50 percent.

West Palm Beach, FL

Tonight
Thunderstorms
75°24°
60%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
80%
Thursday
Thunderstorms
88°/ 78° 31°/ 26°
70%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Saturday
Thunderstorms
85°/ 75° 29°/ 24°
50%
Sunday
Thunderstorms
85°/ 75° 29°/ 24°
50%
Monday
Thunderstorms
85°29°
50%

Night: Mostly cloudy this evening, then becoming partly cloudy. A chance of thunderstorms. Showers likely, mainly this evening. Lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 60 percent.

Fort Myers, FL

Tonight
Thunderstorms
75°24°
60%
Tuesday
Thunderstorms
90°/ 75° 32°/ 24°
50%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Thu-Thu Night
Thunderstorms
90°32°
60%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Sat-Sat Night
Thunderstorms
88°31°
40%
Sunday
Thunderstorms
88°/ 70° 31°/ 21°
30%
Monday
Thunderstorms
88°31°
40%

Night: Partly cloudy. Numerous showers and scattered thunderstorms this evening, then isolated showers and thunderstorms after midnight. Lows in the mid 70s. East winds around 5 mph. Chance of rain 60 percent.

Lion Country Safari Park, FL

Tonight
Thunderstorms
72°22°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Thursday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Saturday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Sunday
Thunderstorms
85°/ 70° 29°/ 21°
50%
Monday
Thunderstorms
85°29°
50%

Night: Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 50 percent.

Boynton Beach, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
80%
Thursday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Friday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Saturday
Thunderstorms
88°/ 75° 31°/ 24°
50%
Sunday
Thunderstorms
85°/ 72° 29°/ 22°
50%
Monday
Thunderstorms
85°29°
50%

Night: Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 50 percent.

Muse, FL

Tonight
Thunderstorms
72°22°
70%
Tuesday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
70%
Thursday
Thunderstorms
90°/ 72° 32°/ 22°
50%
Friday
Thunderstorms
88°/ 70° 31°/ 21°
50%
Saturday
Thunderstorms
88°/ 68° 31°/ 20°
30%
Sunday
Thunderstorms
85°/ 68° 29°/ 20°
30%
Monday
Thunderstorms
85°29°
30%

Night: Partly cloudy. Showers likely with a chance of thunderstorms this evening. Lows in the lower 70s. East winds around 5 mph this evening, becoming light and variable. Chance of rain 70 percent.

Port Charlotte, FL

Tonight
Thunderstorms
75°24°
50%
Tuesday
Thunderstorms
88°/ 75° 31°/ 24°
50%
Wednesday
Thunderstorms
88°/ 75° 31°/ 24°
70%
Thu-Thu Night
Thunderstorms
90°32°
50%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
40%
Sat-Sat Night
Thunderstorms
88°31°
30%
Sunday
Thunderstorms
88°31°
30%
Sun Night-Mon
Thunderstorms
72°22°
30%

Night: Partly cloudy. Scattered showers and thunderstorms, mainly this evening. Lows in the mid 70s. East winds around 5 mph. Chance of rain 50 percent.

Babcock Ranch, FL

Tonight
Thunderstorms
72°22°
60%
Tuesday
Thunderstorms
90°/ 75° 32°/ 24°
60%
Wednesday
Thunderstorms
90°/ 75° 32°/ 24°
70%
Thu-Thu Night
Thunderstorms
92°33°
60%
Friday
Thunderstorms
88°/ 72° 31°/ 22°
40%
Saturday
Thunderstorms
88°/ 70° 31°/ 21°
30%
Sunday
Thunderstorms
88°31°
30%
Sun Night-Mon
Thunderstorms
68°20°
30%

Night: Partly cloudy. Numerous showers and scattered thunderstorms this evening. Lows in the lower 70s. East winds around 5 mph. Chance of rain 60 percent.

Names listed above may include county names.

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