Grassy Key (North) Sea Conditions and Tide Table

Grassy Key (North) 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 06:56 AM and sunset is at 05:35 PM.

Days 1–3 Weather Summary

Light rain (total 6mm), mostly falling on Mon morning. Warm air temperatures (max 26°C on Mon morning, min 20°C on Wed night). Winds decreasing (fresh winds from the NE on Tue afternoon, light winds from the NE by Wed morning).

Days 4–6 Weather Summary

Light rain (total 7mm), mostly falling on Sat night. Warm air temperatures (max 25°C on Sat afternoon, min 18°C on Thu morning). Wind will be generally light.

Days 7–9 Weather Summary

Some drizzle, heaviest during Tue night. Warm (max 25°C on Sun afternoon, min 23°C on Sun night). Winds increasing (light winds from the NE on Sun afternoon, fresh winds from the ENE by Mon afternoon).

Days 10–12 Weather Summary

Mostly dry. Warm (max 24°C on Fri afternoon, min 20°C on Wed night). Mainly fresh winds.

Monday
8
Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
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
6:32PM0.26m
5:57AM0.50m
7:16PM0.26m
8:01PM0.28m
7:44AM0.38m
8:47PM0.30m
8:44AM0.32m
9:34PM0.32m
9:56AM0.27m
10:19PM0.35m
1:39PM0.25m
11:04PM0.37m
2:46PM0.25m
11:49PM0.39m
3:31PM0.25m
00:34AM0.41m
3:57PM0.24m
1:19AM0.43m
3:43PM0.24m
2:03AM0.44m
3:47PM0.24m
2:46AM0.45m
Low Tide
12:52PM-0.03m
11:55PM0.16m
1:46PM0.01m
1:11AM0.16m
2:39PM0.04m
2:34AM0.15m
3:31PM0.08m
3:53AM0.13m
4:21PM0.11m
5:04AM0.11m
5:09PM0.13m
6:05AM0.07m
5:55PM0.15m
6:59AM0.04m
6:40PM0.16m
7:47AM0.01m
7:21PM0.17m
8:32AM-0.01m
8:01PM0.17m
9:15AM-0.02m
8:37PM0.17m
9:56AM-0.02m
9:10PM0.16m
Wave
height (m) 
direction
period (s) 
0.2
WSW
2
0.3
WSW
2
0.2
NNW
2
0.5
NE
3
0.6
NE
3
0.4
ENE
3
0.2
ENE
3
0.2
N
2
0.3
NW
2
0.3
N
2
0.1
N
2
0
W
2
0.2
E
2
0.2
E
2
0.2
E
2
0.4
E
3
0.4
E
3
0.4
E
3
0.2
ENE
2
0.1
NE
2
0.2
NNE
2
0.5
NE
3
0.5
E
3
0.5
E
3
0.4
E
3
0.4
E
3
0.4
E
3
0.6
ENE
3
0.6
ENE
3
0.5
NE
3
0.4
NE
3
0.3
ENE
3
0.2
ENE
3
0.4
NE
3
0.2
ENE
2
0.4
NE
3
thunderstorm
thunderstorm
part cloud
light rain
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
cloud
thunderstorm
clear
clear
clear
clear
clear
part cloud
clear
clear
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
risk tstorm
risk tstorm
some clouds
light rain
risk tstorm
risk tstorm
some clouds
clear
clear
clear
clear
clear
clear
some clouds
some clouds
risk tstorm
cloudy
risk tstorm
clear
clear
clear
clear
clear
some clouds
clear
clear
rain shwrs
clear
clear
clear
clear
clear
clear
clear
clear
clear
 km/h
20
WSW
25
WNW
20
N
30
NNE
30
NE
25
ENE
15
NE
10
NNW
20
NW
20
N
10
N
10
NE
15
E
15
E
20
E
20
ENE
25
ENE
15
ENE
10
NE
5
NE
20
NE
30
NE
30
ENE
25
ENE
25
ENE
25
ENE
25
ENE
30
NE
30
NE
30
NE
25
NNE
20
NE
20
NE
25
NNE
15
NE
25
NE
 mm 
1
1
1
1
2
1
6
1
max°C
26
26
24
24
24
24
24
23
22
20
22
22
23
24
24
24
25
25
24
25
24
24
24
24
23
23
23
23
23
23
22
23
23
23
24
23
Moonrise
9:44
10:45
11:42
12:35
1:27
2:19
3:11
4:04
4:59
5:54
6:49
Moonset
10:36
11:17
11:52
12:24
12:54
1:23
1:53
2:25
3:01
3:41
4:25
5:15
Sunrise
6:56
6:56
6:56
6:58
6:58
6:58
6:58
7:00
7:01
7:01
7:01
7:01
Sunset
5:35
5:35
5:35
5:35
5:36
5:36
5:36
5:37
5:37
5:37
5:37
5:38
Today's sea temperature in Grassy Key (North) is
25.7° C
(Statistics for 08 Dec 1981-2005 – mean: 25.2 max: 26.4 min: 24.2°C)
Issued (local time): 12 pm Monday 08 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest