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 06:41 AM and sunset is at 07:58 PM.

Days 1–3 Weather Summary

Light rain (total 5mm), mostly falling on Tue night. Warm air temperatures (max 28°C on Mon morning, min 27°C on Mon morning). Wind will be generally light.

Days 4–6 Weather Summary

Mostly dry. Warm air temperatures (max 28°C on Sat afternoon, min 26°C on Thu morning). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Warm (max 28°C on Sun morning, min 27°C on Mon night). Winds increasing (light winds from the E on Sun morning, fresh winds from the ENE by Mon night).

Days 10–12 Weather Summary

Light rain (total 2mm), mostly falling on Thu night. Warm (max 28°C on Wed afternoon, min 27°C on Wed morning). Winds increasing (light winds from the E on Wed afternoon, fresh winds from the E by Thu night).

Days 13–16 Weather Summary

Mostly dry. Warm (max 28°C on Sat afternoon, min 27°C on Sat morning). Winds increasing (light winds from the ESE on Sun morning, fresh winds from the E by Tue night).

Monday
11
Tuesday
12
Wednesday
13
Thursday
14
Friday
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tue
26
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
5:15AM0.41m
5:08PM0.45m
5:54AM0.48m
6:27PM0.44m
6:31AM0.55m
7:37PM0.44m
7:09AM0.64m
8:38PM0.43m
7:49AM0.72m
9:33PM0.42m
8:32AM0.78m
10:24PM0.40m
9:18AM0.82m
11:13PM0.37m
10:06AM0.83m
00:03AM0.34m
10:58AM0.81m
00:55AM0.33m
11:52AM0.76m
1:50AM0.33m
12:50PM0.69m
2:50AM0.34m
1:54PM0.60m
3:52AM0.38m
3:09PM0.51m
4:47AM0.44m
4:39PM0.44m
5:34AM0.49m
6:15PM0.40m
Low Tide
11:24AM0.16m
11:46PM0.09m
12:24PM0.07m
00:22AM0.11m
1:17PM-0.03m
00:57AM0.12m
2:06PM-0.13m
1:33AM0.14m
2:55PM-0.20m
2:10AM0.15m
3:44PM-0.25m
2:49AM0.15m
4:35PM-0.26m
3:31AM0.15m
5:29PM-0.24m
6:24PM-0.20m
5:10AM0.16m
7:22PM-0.14m
6:14AM0.17m
8:21PM-0.08m
7:37AM0.19m
9:18PM-0.02m
9:12AM0.17m
10:11PM0.03m
10:38AM0.13m
10:59PM0.07m
11:50AM0.07m
Wave
Height (m)
Direction
Period (s)
0.3
SE
3
0.3
SE
2
0.2
E
2
0.2
ESE
2
0.1
SE
2
0.1
NE
2
0.1
N
2
0.2
WNW
2
0.2
WNW
2
0.2
WNW
2
0.3
WNW
3
0.2
WNW
2
0.1
NW
2
0
W
2
0
W
2
0.1
E
2
0.1
SE
2
0.3
SE
2
0.2
ESE
2
0.3
ESE
3
0.4
ESE
3
0.5
E
3
0.5
E
3
0.7
E
3
0.4
ESE
3
0.4
ESE
3
0.6
E
3
0.3
E
3
0.2
E
2
0.4
ESE
3
0.3
ESE
3
0.4
ESE
3
0.6
ESE
3
0.4
ESE
3
0.5
E
3
0.5
E
3
0.3
ESE
3
0.2
ESE
3
0.3
ESE
2
0.2
ESE
2
0.2
ESE
2
0.4
ESE
3
0.4
SE
3
0.3
ESE
3
0.7
ESE
4
0.6
E
3
0.6
E
3
part cloud
part cloud
rain showers
clear
part cloud
rain showers
clear
cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
rain shwrs
clear
some clouds
rain shwrs
clear
cloudy
some clouds
some clouds
clear
clear
some clouds
clear
clear
clear
clear
some clouds
cloudy
some clouds
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
clear
clear
clear
rain shwrs
some clouds
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
km/h
20
SE
10
SE
15
E
15
SE
0
SSW
10
NNE
10
SW
20
WNW
15
NW
20
WNW
25
WNW
15
NW
10
NNW
10
WSW
0
W
15
ESE
15
SE
20
SE
20
ESE
20
ESE
25
E
25
ENE
30
E
30
E
20
E
20
E
25
E
15
E
15
E
25
E
20
E
25
E
30
ESE
20
E
25
E
25
E
15
ESE
15
ESE
20
ESE
10
ESE
15
SE
25
ESE
15
ESE
25
E
35
ESE
25
E
30
E
1
4
2
max °C
28
28
28
27
28
28
28
28
27
27
27
27
26
27
27
27
28
28
28
28
28
28
28
28
28
28
27
27
28
28
28
28
28
28
28
28
27
28
28
27
28
28
28
28
28
28
28
Moonrise
2:59
3:32
4:05
4:41
5:21
6:07
7:02
8:04
9:12
10:21
11:29
12:32
1:32
2:28
3:22
4:15
Moonset
2:52
3:50
4:50
5:54
7:02
8:13
9:26
10:34
11:35
12:27
1:11
1:49
2:22
2:53
3:24
Sunrise
6:41
6:41
6:41
6:39
6:39
6:39
6:39
6:37
6:37
6:37
6:37
6:37
6:35
6:35
6:35
6:35
Sunset
7:58
7:58
7:59
7:59
8:00
8:00
8:00
8:01
8:01
8:02
8:02
8:04
8:04
8:05
8:05
8:05
Today's sea temperature in Grassy Key (South) is
28.9° C
(Statistics for 11 May 1981-2005 – mean: 26.5 max: 28.1 min: 24.7°C)
Issued (local time): 7 am Monday 11 May 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest