Grassy Key (South) Sea Conditions and Tide Table

Grassy Key (South) Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at — and sunset is at 08:15 PM.

Days 1–4 Weather Summary

Light rain (total 4mm), mostly falling on Sun night. Warm air temperatures (max 28°C on Sun night, min 27°C on Tue night). Mainly fresh winds.

Days 5–7 Weather Summary

Moderate rain (total 14mm), heaviest on Wed night. Warm air temperatures (max 29°C on Fri night, min 27°C on Wed night). Winds decreasing (fresh winds from the ESE on Wed night, light winds from the SSW by Thu afternoon).

Days 8–10 Weather Summary

Light rain (total 5mm), mostly falling on Sat night. Warm (max 28°C on Sat night, min 27°C on Mon night). Mainly fresh winds.

Days 11–13 Weather Summary

Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 29°C on Tue night, min 28°C on Tue night). Wind will be generally light.

Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
1
Wednesday
2
Thursday
3
Fri
4
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
8:31PM0.33m
7:04AM0.78m
9:27PM0.33m
7:59AM0.81m
10:14PM0.33m
8:53AM0.83m
10:55PM0.33m
9:45AM0.81m
11:35PM0.34m
10:35AM0.78m
00:13AM0.36m
11:23AM0.72m
00:50AM0.38m
12:10PM0.65m
1:26AM0.41m
12:57PM0.56m
2:03AM0.44m
1:48PM0.48m
2:40AM0.48m
2:46PM0.40m
3:20AM0.51m
3:57PM0.34m
4:03AM0.54m
Low Tide
00:30AM0.18m
2:34PM-0.20m
1:22AM0.17m
3:26PM-0.22m
2:13AM0.16m
4:16PM-0.21m
3:05AM0.14m
5:04PM-0.18m
5:50PM-0.14m
6:35PM-0.09m
5:52AM0.14m
7:18PM-0.03m
6:59AM0.15m
8:00PM0.03m
8:12AM0.15m
8:41PM0.09m
9:27AM0.13m
9:22PM0.14m
10:38AM0.10m
10:05PM0.18m
11:42AM0.06m
Wave
height (m) 
direction
period (s) 
0.5
ESE
3.0
0.6
ESE
3.0
0.6
ESE
3.0
0.6
E
3.0
0.5
E
3.0
0.6
E
3.0
0.6
E
3.0
0.4
ESE
3.0
0.3
ESE
3.0
0.5
SE
3.0
0.4
SE
2.0
0.2
SSE
2.0
0.2
SSE
2.0
0.2
ESE
2.0
0.4
SE
3.0
0.4
SE
3.0
0.5
ESE
3.0
0.5
ESE
3.0
0.5
E
3.0
0.5
E
3.0
0.5
E
3.0
0.5
ESE
3.0
0.4
ESE
3.0
0.4
ESE
3.0
0.4
ESE
3.0
0.3
SE
3.0
0.3
SE
3.0
0.4
SE
3.0
0.2
ESE
2.0
0.2
ESE
3.0
0.2
ESE
2.0
0.3
SE
3.0
0.2
ESE
2.0
0.3
ESE
2.0
0.2
ESE
2.0
0.3
SE
3.0
thunderstorm
clear
clear
clear
clear
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
clear
clear
thunderstorm
clear
rain showers
cloud
part cloud
thunderstorm
clear
clear
rain showers
rain showers
clear
rain showers
clear
clear
rain showers
clear
clear
clear
thunderstorm
clear
clear
rain showers
thunderstorm
risk tstorm
clear
clear
clear
clear
risk tstorm
clear
clear
risk tstorm
risk tstorm
risk tstorm
clear
clear
risk tstorm
clear
rain shwrs
cloudy
some clouds
risk tstorm
clear
clear
rain shwrs
rain shwrs
clear
rain shwrs
clear
clear
rain shwrs
clear
clear
clear
risk tstorm
clear
clear
rain shwrs
risk tstorm
 km/h
30
E
30
E
30
E
30
E
25
E
30
E
30
E
25
E
20
E
25
SE
15
SW
10
SSE
20
SE
15
ESE
20
ESE
15
ESE
25
E
30
E
25
ESE
25
E
30
E
25
ESE
25
ESE
25
ESE
20
SE
20
ESE
15
SE
25
SE
15
E
15
ESE
15
ESE
15
ESE
15
ESE
20
ESE
15
SE
20
ESE
 mm 
2
1
1
7
4
1
2
2
1
1
1
2
1
1
2
max°C
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
29
28
28
28
28
28
28
28
28
28
28
28
29
28
29
28
28
28
28
28
28
Moonrise
3:37
4:28
5:26
6:30
7:37
8:44
9:47
10:46
11:41
12:33
1:25
2:16
3:08
Moonset
5:37
6:48
7:56
8:58
9:52
10:37
11:15
11:49
12:19
12:49
1:17
1:47
Sunrise
6:35
6:35
6:35
6:35
6:35
6:37
6:37
6:37
6:37
6:37
6:37
6:39
Sunset
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:16
8:16
8:16
8:16
8:16
Today's sea temperature in Grassy Key (South) is 29.8 °C (Statistics for 22 Jun 1981-2005 – mean: 28.8 max: 29.5 min: 28.0°C)
Issued (local time): 7 pm Sunday 22 Jun 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest