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 — and sunset is at —.

Days 1–4 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Icy conditions (max 12°C on Fri afternoon, min 0°C on Sat morning). Winds decreasing (stormy winds from the S on Fri night, light winds from the SW by Sat night).

Days 5–7 Weather Summary

Some drizzle, heaviest during Tue night. Icy conditions (max 3°C on Sun night, min -4°C on Mon night). Winds decreasing (gales from the NW on Mon afternoon, light winds from the NNE by Wed morning).

Days 8–10 Weather Summary

Heavy rain (total 25mm), heaviest during Fri afternoon. Freeze-thaw conditions (max 7°C on Thu night, min -1°C on Wed night). Winds increasing (calm on Wed night, strong winds from the NNW by Sat afternoon).

Days 11–13 Weather Summary

Mostly dry. Freeze-thaw conditions (max 1°C on Sat night, min -3°C on Sat night). Winds decreasing (strong winds from the NNW on Sat night, light winds from the WNW by Mon morning).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tue
30
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
High Tide
9:29PM3.17m
9:36AM3.58m
10:12PM3.19m
10:17AM3.59m
10:53PM3.19m
10:58AM3.56m
11:35PM3.16m
11:39AM3.50m
00:16AM3.11m
12:20PM3.42m
00:58AM3.07m
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
Low Tide
3:04AM1.16m
3:49PM0.82m
3:44AM1.14m
4:29PM0.77m
4:25AM1.11m
5:08PM0.73m
5:06AM1.07m
5:48PM0.69m
5:47AM1.03m
6:28PM0.67m
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
Wave
height (m) 
direction
period (s) 
1
SW
8
1.3
SSW
7
1.8
SSW
8
1.3
SSW
12
1.3
SW
12
1.2
SW
12
1.2
SSW
10
1.4
SW
8
1.3
SW
9
1.3
WSW
8
1.4
W
8
1.5
W
8
1.2
WNW
7
0.9
W
6
0.9
WSW
5
0.7
WSW
6
0.5
SW
6
0.8
WNW
4
0.4
SW
8
0.5
WSW
3
1.1
SW
6
0.7
SW
6
0.7
SW
6
0.7
SW
7
1.1
SW
10
1
SW
10
1.1
SW
9
0.9
SW
8
0.9
SW
8
0.8
NW
3
0.4
NNW
3
0.2
SSW
7
0.2
SSW
6
0.4
NW
2
0.6
NW
3
0.5
WNW
3
clear
cloud
light rain
rain showers
cloud
clear
cloud
cloud
clear
cloud
cloud
cloud
part cloud
part cloud
cloud
light rain
cloud
cloud
part cloud
cloud
cloud
mod rain
light rain
heavy rain
cloud
cloud
cloud
cloud
part cloud
clear
part cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
cloudy
light rain
rain shwrs
cloudy
clear
cloudy
cloudy
clear
cloudy
cloudy
cloudy
some clouds
some clouds
cloudy
light rain
cloudy
cloudy
some clouds
cloudy
cloudy
mod rain
light rain
heavy rain
cloudy
cloudy
cloudy
cloudy
some clouds
clear
some clouds
cloudy
cloudy
some clouds
some clouds
some clouds
 km/h
30
S
50
SSE
80
S
55
WSW
65
WNW
40
WNW
30
SSW
55
SW
50
W
50
WNW
55
NW
60
NW
45
NW
35
W
35
WSW
15
NNE
10
NNE
35
NNW
10
N
30
SW
40
SW
15
SSW
20
SE
20
WSW
25
NNW
35
NW
45
NNW
40
N
35
N
35
N
25
NNW
5
WNW
15
WNW
25
NNW
30
NNW
25
WNW
 mm 
2
2
1
7
4
14
max°C
10
11
12
12
2
1
3
8
8
3
-2
-3
-3
0
3
2
1
1
0
3
4
7
7
7
5
3
3
1
-3
-3
-3
-2
0
-1
-2
-1
Moonrise
7:54
8:46
9:29
10:05
10:34
10:58
11:19
11:39
11:58
12:19
12:44
1:14
Moonset
4:06
5:02
6:04
7:12
8:21
9:30
10:40
11:50
1:02
2:18
3:37
Sunrise
7:52
7:52
7:52
7:54
7:54
7:54
7:54
7:54
7:56
7:56
7:56
7:56
Sunset
4:49
4:50
4:50
4:51
4:51
4:52
4:52
4:52
4:53
4:53
4:54
4:55
Today's sea temperature in Flat Island is
5.9° C
(Statistics for 18 Dec 1981-2005 – mean: 6.6 max: 8.1 min: 4.4°C)
Issued (local time): 7 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest