Flat Island Sea Conditions and Tide Table

Flat Island 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 07:54 AM and sunset is at 04:52 PM.

Days 1–3 Weather Summary

Light rain (total 4mm) at first, then becoming colder with a dusting of snow on Thu afternoon. Icy conditions (max 2°C on Thu afternoon, min -5°C on Fri morning). Winds increasing (light winds from the NW on Wed night, near gales from the NNW by Thu night).

Days 4–6 Weather Summary

Moderate rain (total 11mm), heaviest on Mon afternoon. Icy conditions (max 7°C on Mon afternoon, min -6°C on Sat morning). Winds increasing (light winds from the WNW on Sun night, near gales from the WSW by Mon night).

Days 7–9 Weather Summary

Drizzle on Wed night followed by colder weather and a moderate fall of snow, heaviest on Thu night. Freeze-thaw conditions (max 3°C on Wed night, min -6°C on Thu night). Winds decreasing (near gales from the WSW on Tue morning, moderate winds from the N by Thu afternoon).

Days 10–12 Weather Summary

A light covering of new snow, mostly falling on Fri morning. Freeze-thaw conditions (max 2°C on Mon morning, min -11°C on Fri afternoon). Winds decreasing (near gales from the NW on Fri afternoon, light winds from the ESE by Sun morning).

Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sunday
4
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
1:02PM3.33m
1:40AM3.06m
1:47PM3.24m
2:25AM3.08m
2:35PM3.17m
3:12AM3.14m
3:28PM3.12m
4:01AM3.25m
4:26PM3.10m
4:55AM3.39m
5:27PM3.13m
5:51AM3.56m
6:29PM3.20m
6:48AM3.73m
7:28PM3.29m
7:45AM3.87m
8:27PM3.38m
8:41AM3.99m
9:23PM3.47m
9:36AM4.06m
10:16PM3.53m
10:29AM4.05m
11:08PM3.56m
Low Tide
6:31AM1.00m
7:09PM0.66m
7:18AM0.97m
7:51PM0.68m
8:08AM0.95m
8:37PM0.72m
9:03AM0.92m
9:26PM0.77m
10:01AM0.87m
10:18PM0.83m
11:01AM0.80m
11:13PM0.87m
12:02PM0.72m
00:10AM0.88m
1:03PM0.61m
1:06AM0.88m
2:01PM0.53m
2:05AM0.82m
2:58PM0.42m
3:02AM0.75m
3:53PM0.33m
3:59AM0.68m
4:47PM0.28m
4:54AM0.62m
Wave
height (m) 
direction
period (s) 
0.9
E
4
0.7
SE
8
0.4
SSE
9
0.5
S
9
1.1
WSW
6
1.3
WNW
7
1.1
NW
7
0.9
NNW
3
0.6
SSE
10
0.7
SSE
12
0.7
SSE
12
0.7
SSE
12
1
WNW
5
0.9
WNW
5
0.5
W
4
0.9
SSW
5
1.3
SSW
7
1.4
WSW
9
1.3
SW
10
1.3
SW
11
1.3
SW
10
1.3
SW
9
1.3
SW
8
1.3
SW
8
1.1
SW
8
0.9
SW
8
0.8
SW
8
1.2
W
6
1.1
W
6
0.8
W
6
0.6
W
6
0.5
W
5
0.3
SSE
10
0.2
SSE
10
0.2
SSE
9
0.6
WSW
4
cloud
part cloud
clear
cloud
light snow
cloud
part cloud
cloud
part cloud
part cloud
cloud
clear
clear
clear
part cloud
light rain
mod rain
part cloud
light snow
cloud
cloud
cloud
cloud
light rain
cloud
light snow
mod snow
light snow
cloud
light snow
light snow
cloud
cloud
cloud
cloud
cloud
cloudy
some clouds
clear
cloudy
light snow
cloudy
some clouds
cloudy
some clouds
some clouds
cloudy
clear
clear
clear
some clouds
light rain
mod rain
some clouds
light snow
cloudy
cloudy
cloudy
cloudy
light rain
cloudy
light snow
mod snow
light snow
cloudy
light snow
light snow
cloudy
cloudy
cloudy
cloudy
cloudy
 km/h
45
ENE
35
NE
15
NNE
20
SSW
45
NNW
55
NNW
50
N
40
N
30
N
30
N
35
N
35
NNW
45
NW
40
NW
20
WNW
40
SSE
40
SW
55
WSW
60
WSW
50
WSW
40
W
35
W
40
W
40
WSW
25
NNW
20
N
40
N
50
NW
45
NW
35
NW
30
NNW
25
NNW
10
NNE
10
SSE
15
SSW
25
SW
 mm 
4
1
10
1
max°C
-1
-1
-2
0
2
0
-5
-5
-5
-5
-3
-3
-2
1
4
5
7
4
-1
0
1
0
0
3
1
-3
-4
-8
-10
-10
-10
-9
-10
-8
-3
1
Moonrise
10:58
11:19
11:39
11:58
12:19
12:44
1:14
1:54
2:46
3:53
5:10
6:31
Moonset
9:30
10:40
11:50
1:02
2:18
3:37
4:59
6:20
7:32
8:30
9:14
Sunrise
7:54
7:54
7:54
7:56
7:56
7:56
7:56
7:56
7:56
7:56
7:56
7:56
Sunset
4:52
4:52
4:52
4:53
4:53
4:54
4:55
4:57
4:58
4:59
5:00
5:00
Today's sea temperature in Flat Island is
5.4° C
(Statistics for 24 Dec 1981-2005 – mean: 6.1 max: 7.2 min: 4.4°C)
Issued (local time): 1 am Wednesday 24 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest