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

A dusting of new snow. Icy conditions (max 1°C on Thu afternoon, min -6°C on Fri night). Winds increasing (light winds from the WNW on Thu morning, near gales from the NW by Sat night).

Days 4–6 Weather Summary

Moderate rain (total 10mm), heaviest on Mon afternoon. Icy conditions (max 8°C on Mon night, min -2°C on Tue afternoon). Winds increasing (light winds from the W on Sun night, gales from the W by Tue afternoon).

Days 7–9 Weather Summary

Light rain (total 2mm) at first, then becoming colder with a dusting of snow on Thu afternoon. Freeze-thaw conditions (max 4°C on Wed night, min -8°C on Thu night). Winds decreasing (near gales from the WSW on Thu morning, light winds from the WSW by Fri night).

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Sat night. Freeze-thaw conditions (max 9°C on Sat night, min -7°C on Tue morning). Winds decreasing (gales from the SW on Sat night, light winds from the ENE by Sun night).

Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sunday
4
Monday
5
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
1:47PM3.24m
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
11:21AM3.97m
11:58PM3.54m
Low Tide
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
5:39PM0.27m
Wave
height (m) 
direction
period (s) 
0.5
S
9
1.1
WSW
5
1.1
W
7
1
NW
7
0.8
NNW
3
0.5
N
3
0.6
NNW
3
0.7
NW
4
1.1
NW
5
1.3
WNW
6
1.2
WNW
6
0.6
WNW
6
0.4
SW
3
0.9
SSE
4
1.4
SW
8
1.5
WSW
10
1.4
WSW
10
1.4
WSW
10
1.3
WSW
9
1.3
WSW
8
1.4
SW
7
1.4
SW
8
1.3
SW
8
1.1
WSW
7
0.6
SW
7
0.6
SW
7
0.5
WSW
3
1
SW
5
1.4
SW
7
1.1
SW
8
1
SSW
7
0.8
SSW
7
0.5
SSW
7
0.4
SSW
7
0.4
SW
7
0.6
N
3
cloud
light snow
part cloud
part cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light snow
cloud
cloud
cloud
cloud
cloud
light rain
rain showers
part cloud
clear
cloud
cloud
cloud
cloud
cloudy
light snow
some clouds
some clouds
cloudy
cloudy
some clouds
some clouds
clear
clear
clear
some clouds
cloudy
light rain
light rain
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
light rain
light snow
cloudy
cloudy
cloudy
cloudy
cloudy
light rain
rain shwrs
some clouds
clear
cloudy
cloudy
cloudy
cloudy
 km/h
20
SW
55
NW
50
N
45
N
35
N
30
N
30
N
40
NNW
50
NW
60
NW
50
NW
25
NW
25
S
45
SE
50
W
70
W
65
W
60
W
45
W
40
W
45
SW
55
WSW
50
NW
35
NW
25
WNW
20
W
30
WSW
40
SSW
60
S
30
WNW
35
NNW
30
NNW
15
NE
15
ENE
15
ENE
40
NNE
 mm 
5
5
2
1
6
max°C
-1
1
-1
-4
-5
-5
-5
-3
-2
0
2
2
5
6
8
1
-2
0
0
1
4
3
-3
-6
-7
-5
-1
0
6
9
0
-3
-3
-2
0
-1
Moonrise
11:19
11:39
11:58
12:19
12:44
1:14
1:54
2:46
3:53
5:10
6:31
7:50
Moonset
10:40
11:50
1:02
2:18
3:37
4:59
6:20
7:32
8:30
9:14
9:47
Sunrise
7:54
7:54
7:56
7:56
7:56
7:56
7:56
7:56
7:56
7:56
7:56
7:56
Sunset
4:52
4:52
4:53
4:53
4:54
4:55
4:57
4:58
4:59
5:00
5:00
5:01
Today's sea temperature in Flat Island is
5.0° C
(Statistics for 25 Dec 1981-2005 – mean: 6.0 max: 7.2 min: 3.9°C)
Issued (local time): 7 am Thursday 25 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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