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 07:03 AM and sunset is at 05:38 PM.

Days 1–3 Weather Summary

Some drizzle, heaviest during Tue night. Warm air temperatures (max 24°C on Sun morning, min 23°C on Sun night). Winds increasing (light winds from the ENE on Sun morning, strong winds from the ENE by Mon night).

Days 4–6 Weather Summary

Mostly dry. Warm air temperatures (max 24°C on Wed morning, min 21°C on Fri morning). Winds decreasing (fresh winds from the ENE on Wed afternoon, light winds from the E by Fri afternoon).

Days 7–9 Weather Summary

Mostly dry. Warm (max 23°C on Sat afternoon, min 20°C on Sun night). Wind will be generally light.

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Tue night. Warm (max 22°C on Tue morning, min 19°C on Tue night). Mainly fresh winds.

Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
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
4:48PM0.25m
4:11AM0.46m
5:26PM0.25m
4:53AM0.45m
6:05PM0.25m
5:37AM0.44m
6:45PM0.27m
6:24AM0.41m
7:25PM0.28m
7:15AM0.37m
8:07PM0.31m
8:13AM0.32m
8:51PM0.34m
9:20AM0.27m
9:38PM0.38m
10:38AM0.23m
10:29PM0.42m
12:17PM0.21m
11:25PM0.45m
2:14PM0.20m
00:23AM0.48m
3:18PM0.20m
1:23AM0.50m
Low Tide
11:18AM-0.02m
10:00PM0.16m
11:59AM-0.02m
10:19PM0.16m
12:38PM-0.01m
10:48PM0.16m
1:17PM0.01m
11:40PM0.16m
1:54PM0.04m
1:09AM0.15m
2:31PM0.06m
2:56AM0.12m
3:10PM0.10m
4:21AM0.08m
3:52PM0.12m
5:31AM0.03m
4:40PM0.15m
6:33AM-0.03m
5:33PM0.16m
7:31AM-0.08m
6:25PM0.16m
8:24AM-0.11m
7:23PM0.14m
Wave
height (m) 
direction
period (s) 
0.4
NE
2
0.3
E
3
0.5
ENE
3
0.7
ENE
4
0.9
ENE
4
1
E
4
0.8
E
4
0.8
E
4
0.8
E
4
0.6
E
3
0.6
E
3
0.6
E
3
0.6
E
3
0.5
E
3
0.4
E
3
0.3
ENE
3
0.1
NE
2
0.1
NE
2
0.2
NNE
2
0.4
ENE
3
0.3
ESE
3
0.3
E
2
0.2
E
2
0.1
NE
2
0.2
NNW
2
0.3
NW
2
0.3
NW
2
0.5
NE
3
0.5
ENE
3
0.7
NE
3
0.6
NE
3
0.5
ENE
3
0.5
ENE
3
0.5
NE
3
0.5
E
3
0.6
E
3
clear
clear
clear
clear
clear
part cloud
part cloud
clear
rain showers
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
rain showers
light rain
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
clear
rain shwrs
some clouds
clear
clear
some clouds
some clouds
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
rain shwrs
light rain
rain shwrs
clear
clear
clear
clear
clear
 km/h
20
NE
20
E
25
ENE
35
ENE
40
ENE
40
ENE
30
E
35
ENE
35
ENE
25
ENE
30
ENE
30
ENE
30
ENE
25
ENE
15
ENE
15
NE
5
E
10
N
15
NE
25
ENE
20
E
15
NE
10
E
15
NNW
15
NNW
20
NW
20
NNW
30
NE
30
ENE
35
NNE
30
NE
30
NE
25
NE
25
NE
30
ENE
25
E
 mm 
1
1
4
2
max°C
24
24
24
24
23
24
24
24
23
24
23
23
23
23
23
22
23
23
22
23
23
23
23
22
21
21
22
22
22
21
21
22
22
21
21
22
Moonrise
8:29
9:13
9:53
10:28
11:02
11:34
12:06
12:41
1:19
2:03
2:55
3:55
Moonset
7:06
8:04
9:01
9:58
10:54
11:51
12:50
1:51
2:57
4:06
5:17
Sunrise
7:03
7:03
7:03
7:05
7:05
7:05
7:05
7:05
7:07
7:07
7:07
7:07
Sunset
5:38
5:39
5:40
5:40
5:42
5:42
5:43
5:43
5:44
5:45
5:45
5:45
Today's sea temperature in Grassy Key (North) is
23.9° C
(Statistics for 21 Dec 1981-2005 – mean: 24.6 max: 26.3 min: 22.9°C)
Issued (local time): 12 pm Sunday 21 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest