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 06:33 AM and sunset is at 08:12 PM.

Days 1–3 Weather Summary

Light rain (total 3mm), mostly falling on Thu afternoon. Warm air temperatures (max 28°C on Tue morning, min 27°C on Tue night). Wind will be generally light.

Days 4–6 Weather Summary

Light rain (total 2mm), mostly falling on Fri afternoon. Warm air temperatures (max 28°C on Fri morning, min 27°C on Fri night). Wind will be generally light.

Days 7–9 Weather Summary

Some drizzle, heaviest during Wed night. Warm (max 29°C on Mon afternoon, min 28°C on Mon morning). Winds increasing (light winds from the SSE on Mon afternoon, fresh winds from the SE by Tue night).

Days 10–12 Weather Summary

Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 29°C on Thu morning, min 27°C on Sat morning). Mainly fresh winds.

Days 13–16 Weather Summary

Moderate rain (total 16mm), heaviest on Sun night. Warm (max 28°C on Sun morning, min 27°C on Sun night). Mainly fresh winds.

Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wed
24
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
AM
PM
Wave Height Map
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High Tide
4:36PM0.39m
4:51AM0.56m
6:05PM0.36m
5:37AM0.64m
7:28PM0.35m
6:26AM0.71m
8:35PM0.35m
7:18AM0.78m
9:30PM0.34m
8:11AM0.83m
10:19PM0.34m
9:05AM0.85m
11:05PM0.34m
9:59AM0.84m
11:49PM0.35m
10:53AM0.81m
00:34AM0.36m
11:47AM0.74m
1:18AM0.39m
12:41PM0.65m
2:04AM0.43m
1:39PM0.55m
2:49AM0.47m
2:44PM0.45m
3:35AM0.51m
4:04PM0.37m
4:20AM0.55m
5:52PM0.32m
Low Tide
10:55AM0.10m
10:33PM0.14m
12:01PM0.01m
11:16PM0.16m
12:59PM-0.08m
00:01AM0.18m
1:53PM-0.16m
00:48AM0.18m
2:45PM-0.21m
1:36AM0.17m
3:37PM-0.24m
2:25AM0.15m
4:28PM-0.24m
3:17AM0.13m
5:19PM-0.21m
6:09PM-0.17m
5:12AM0.12m
6:57PM-0.11m
6:21AM0.13m
7:45PM-0.05m
7:38AM0.13m
8:31PM0.02m
9:00AM0.12m
9:17PM0.08m
10:18AM0.09m
10:02PM0.13m
11:28AM0.04m
Wave
Height (m)
Direction
Period (s)
0.2
ESE
2
0.3
ESE
2
0.4
ESE
3
0.2
ESE
2
0.3
ESE
2
0.4
ESE
3
0.2
ESE
2
0.2
ESE
2
0.3
ESE
2
0.2
ESE
2
0.1
SE
2
0.1
S
2
0.1
E
2
0.2
ESE
2
0.1
SE
2
0.2
ESE
2
0.3
SE
2
0.3
S
2
0.2
SSE
2
0.2
SSE
2
0.3
SE
2
0.3
SE
2
0.4
SE
3
0.5
SE
3
0.7
SE
4
0.6
SE
3
0.4
SE
3
0.4
SE
3
0.4
SE
3
0.7
SE
3
0.8
SE
4
0.6
ESE
3
0.6
ESE
3
0.5
SE
3
0.4
ESE
3
0.5
ESE
3
0.6
ESE
3
0.5
E
3
0.5
ESE
3
0.7
ESE
3
0.5
ESE
3
0.5
ESE
3
0.5
ESE
3
0.5
ESE
3
0.5
ESE
3
0.4
ESE
3
0.4
ESE
3
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
thunderstorm
rain showers
cloud
thunderstorm
clear
clear
clear
part cloud
clear
clear
rain showers
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
rain showers
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
risk tstorm
rain shwrs
cloudy
risk tstorm
clear
clear
clear
some clouds
clear
clear
rain shwrs
clear
clear
clear
some clouds
clear
some clouds
some clouds
some clouds
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
clear
rain shwrs
some clouds
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
clear
risk tstorm
risk tstorm
km/h
15
E
20
ESE
25
ESE
15
ESE
20
E
20
ESE
15
ESE
15
ESE
15
ESE
15
ESE
10
SSE
5
ESE
15
E
15
SE
10
SE
15
ESE
15
SSE
20
S
15
SSE
10
SSE
20
SSE
15
ESE
20
ESE
30
ESE
30
SE
25
SE
20
SSE
20
SE
20
SSE
30
SE
35
ESE
30
ESE
25
ESE
25
SE
20
ESE
25
ESE
30
ESE
20
E
30
E
30
ESE
25
ESE
25
ESE
30
ESE
25
ESE
25
ESE
20
ESE
25
ESE
1
2
1
1
1
3
1
4
1
3
3
1
1
1
4
2
2
1
2
1
2
1
max °C
28
28
28
28
28
28
27
27
28
28
28
28
27
28
28
27
28
28
28
29
29
28
29
29
29
29
29
29
29
28
28
29
29
28
28
28
28
28
28
28
28
28
27
28
28
28
28
Moonrise
2:02
2:36
3:12
3:54
4:44
5:42
6:49
8:00
9:11
10:18
11:21
12:20
1:16
2:10
3:04
3:58
Moonset
2:35
3:35
4:39
5:48
7:00
8:11
9:17
10:15
11:04
11:45
12:21
12:54
1:25
1:57
2:29
Sunrise
6:33
6:33
6:33
6:33
6:33
6:33
6:33
6:33
6:33
6:33
6:33
6:35
6:35
6:35
6:35
6:35
Sunset
8:12
8:12
8:12
8:13
8:13
8:13
8:14
8:14
8:14
8:15
8:15
8:15
8:15
8:15
8:15
8:15
Today's sea temperature in Grassy Key (South) is
28.4° C
(Statistics for 09 Jun 1981-2005 – mean: 28.3 max: 29.6 min: 26.8°C)
Issued (local time): 1 am Tuesday 09 Jun 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest