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 06:21 PM.

Days 1–4 Weather Summary

Mostly dry. Warm air temperatures (max 24°C on Sat afternoon, min 9°C on Mon night). Winds increasing (calm on Sat night, strong winds from the N by Sun night).

Days 5–7 Weather Summary

Light rain (total 2mm), mostly falling on Thu night. Warm air temperatures (max 24°C on Fri morning, min 13°C on Tue afternoon). Wind will be generally light.

Days 8–10 Weather Summary

Light rain (total 5mm), mostly falling on Fri night. Warm (max 24°C on Fri afternoon, min 23°C on Sun night). Mainly fresh winds.

Days 11–13 Weather Summary

Light rain (total 6mm), mostly falling on Mon afternoon. Warm (max 23°C on Mon afternoon, min 21°C on Tue afternoon). Winds increasing (fresh winds from the ENE on Mon afternoon, near gales from the ENE by Tue afternoon).

Sat
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
Saturday
7
Sunday
8
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
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
Wave Height Map
High Tide
00:01AM0.36m
11:42AM0.59m
1:00AM0.28m
12:27PM0.60m
2:17AM0.21m
1:23PM0.60m
4:38AM0.17m
2:34PM0.59m
6:28AM0.20m
4:02PM0.58m
7:09AM0.23m
5:30PM0.59m
7:41AM0.27m
6:41PM0.61m
8:09AM0.33m
7:38PM0.61m
8:35AM0.38m
8:26PM0.59m
8:59AM0.43m
9:08PM0.55m
9:23AM0.48m
9:48PM0.50m
9:47AM0.52m
10:25PM0.45m
10:13AM0.55m
11:02PM0.39m
10:43AM0.55m
Low Tide
5:46PM-0.14m
5:14AM0.05m
6:51PM-0.13m
5:44AM0.09m
8:07PM-0.12m
9:31PM-0.12m
7:21AM0.16m
10:50PM-0.13m
9:13AM0.17m
11:56PM-0.14m
10:46AM0.13m
00:49AM-0.16m
11:58AM0.08m
1:32AM-0.15m
12:58PM0.02m
2:10AM-0.14m
1:52PM-0.04m
2:43AM-0.12m
2:41PM-0.09m
3:15AM-0.08m
3:28PM-0.12m
3:45AM-0.04m
4:13PM-0.13m
4:14AM0.01m
4:59PM-0.12m
4:40AM0.05m
5:46PM-0.10m
Wave
height (m) 
direction
period (s) 
0.1
S
2
0
E
2
0.1
NE
2
0.3
W
2
0.9
NNW
4
0.8
NNW
4
0.8
NW
4
0.6
NNW
3
0.5
N
3
0.1
W
3
0.1
NW
2
0.2
ESE
2
0.2
ESE
2
0.6
ESE
3
0.6
ESE
3
0.5
SE
3
0.5
SE
3
0.3
ESE
3
0.3
ESE
2
0.3
E
3
0.2
E
2
0.3
ESE
2
0.3
E
3
0.2
E
2
0.2
ESE
2
0.3
ENE
3
0.5
ENE
3
0.6
E
3
0.8
ENE
4
1.2
E
4
1.4
E
5
1.6
E
5
1.4
E
4
1.3
E
4
1.2
ESE
4
1
ESE
4
0.8
ESE
4
0.9
ESE
4
0.9
ESE
4
0.7
ESE
4
0.8
ESE
4
0.5
ESE
3
0.5
E
3
0.5
E
3
0.4
ESE
3
0.4
ESE
3
0.6
E
3
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
clear
clear
thunderstorm
clear
clear
thunderstorm
clear
rain showers
thunderstorm
clear
thunderstorm
thunderstorm
rain showers
rain showers
part cloud
part cloud
cloud
part cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
risk tstorm
clear
clear
risk tstorm
clear
clear
risk tstorm
clear
rain shwrs
risk tstorm
clear
risk tstorm
risk tstorm
rain shwrs
rain shwrs
some clouds
some clouds
cloudy
some clouds
cloudy
some clouds
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
 km/h
5
SSW
5
SSW
5
WSW
25
WNW
45
NNW
40
NNW
40
NW
35
N
25
N
5
NE
10
NE
15
SE
15
ESE
25
ESE
25
ESE
20
SE
20
SE
15
ESE
15
ESE
20
E
15
ESE
15
ESE
20
E
10
ENE
15
E
25
NE
30
ENE
30
ENE
40
NE
50
ENE
55
ENE
55
ENE
50
E
45
E
40
E
35
E
30
E
35
ESE
35
E
30
E
30
ESE
25
ESE
20
E
25
E
20
E
25
E
30
E
 mm 
2
1
2
1
1
1
1
2
2
max°C
24
23
23
23
19
12
14
14
12
14
17
19
20
21
22
23
23
24
24
24
24
24
24
24
24
24
23
23
23
22
22
22
22
22
22
23
23
23
23
23
23
23
23
23
23
23
23
Moonrise
9:58
10:43
11:34
12:33
1:37
2:44
3:50
4:53
5:54
6:51
7:47
8:41
9:36
10:31
Moonset
10:40
11:45
12:52
1:59
3:03
4:01
4:51
5:34
6:12
6:46
7:18
7:49
8:20
8:54
10:29
Sunrise
6:52
6:50
6:50
6:48
6:48
6:48
6:47
6:46
6:45
6:43
6:43
6:41
6:41
6:39
7:39
Sunset
6:21
6:22
6:22
6:22
6:23
6:23
6:24
6:24
6:25
6:25
6:27
6:27
6:28
6:28
6:29
7:29
Today's sea temperature in Grassy Key (South) is
22.2° C
(Statistics for 21 Feb 1981-2005 – mean: 23.6 max: 24.9 min: 22.5°C)
Issued (local time): 6 pm Saturday 21 Feb 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest