Kosai-shi Sea Conditions and Tide Table

Kosai-shi 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 06:50 AM and sunset is at 04:40 PM.

Days 1–3 Weather Summary

Heavy rain (total 45mm), heaviest during Fri night. Cool air temperatures (max 16°C on Sat morning, min 8°C on Thu morning). Wind will be generally light.

Days 4–6 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Cool air temperatures (max 17°C on Sun afternoon, min 9°C on Sun night). Mainly fresh winds.

Days 7–9 Weather Summary

Heavy rain (total 27mm), heaviest during Wed night. Very mild (max 15°C on Wed afternoon, min 7°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NW by Thu afternoon).

Days 10–12 Weather Summary

Heavy rain (total 23mm), heaviest during Sat night. Very mild (max 13°C on Sat afternoon, min 4°C on Mon night). Mainly near gales.

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
3:44PM1.52m
5:51AM1.57m
4:21PM1.55m
6:25AM1.60m
4:56PM1.58m
6:58AM1.61m
5:32PM1.60m
7:32AM1.60m
6:07PM1.59m
8:05AM1.59m
6:44PM1.56m
8:39AM1.58m
7:24PM1.51m
9:13AM1.57m
8:11PM1.43m
9:50AM1.55m
9:08PM1.35m
10:30AM1.53m
10:26PM1.27m
11:13AM1.51m
00:10AM1.24m
12:03PM1.50m
2:00AM1.31m
Low Tide
10:32AM1.03m
10:48PM0.21m
11:09AM1.02m
11:23PM0.15m
11:43AM1.01m
11:57PM0.12m
12:17PM0.99m
00:32AM0.11m
12:51PM0.97m
1:06AM0.13m
1:27PM0.95m
1:41AM0.17m
2:08PM0.93m
2:17AM0.25m
2:53PM0.90m
2:55AM0.36m
3:46PM0.85m
3:37AM0.50m
4:48PM0.78m
4:29AM0.66m
5:57PM0.67m
5:35AM0.84m
7:09PM0.53m
Wave
height (m) 
direction
period (s) 
1.2
WNW
4
0.8
NW
4
0.5
E
16
0.5
E
15
0.6
ESE
5
1.3
ESE
5
2
SSE
8
1.5
SSE
7
1.4
SE
7
1.7
SSE
7
1.7
SSE
8
1.8
SSE
8
1.7
SSE
8
1.5
SE
8
1.4
ESE
9
1.7
ESE
9
1.5
ESE
6
1.2
SE
9
1.4
ESE
5
1.4
SE
6
1.6
SSE
6
1.7
SSE
7
1.8
WNW
5
1.3
SE
8
1.3
ESE
9
1.5
ESE
10
1.7
ESE
7
1.7
ESE
6
2.2
E
7
4
ESE
8
2.5
SE
9
3
WNW
6
3
WNW
6
2.2
NW
6
2.2
WNW
6
1.9
NW
6
clear
clear
clear
clear
cloud
heavy rain
rain showers
rain showers
light rain
light rain
cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
cloud
heavy rain
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
heavy rain
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloudy
heavy rain
rain shwrs
rain shwrs
light rain
light rain
cloudy
clear
some clouds
some clouds
some clouds
some clouds
clear
some clouds
cloudy
cloudy
heavy rain
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
cloudy
cloudy
heavy rain
rain shwrs
some clouds
clear
clear
clear
clear
 km/h
20
NW
15
NW
5
N
5
NE
5
ESE
20
E
10
NE
15
ESE
10
ENE
5
E
5
WSW
25
NW
20
NW
5
NNW
5
ENE
20
ENE
20
ESE
10
NE
10
ENE
20
E
5
S
25
NW
35
NW
10
NW
5
N
5
E
15
ENE
15
ENE
30
E
50
ENE
30
NW
50
NW
45
NW
40
NW
40
NW
35
NW
 mm 
38
2
1
4
3
27
22
1
max°C
11
13
11
13
14
14
16
15
15
16
17
15
12
13
11
11
11
11
13
15
14
14
13
10
10
11
10
12
13
13
10
12
9
8
8
5
Moonrise
5:14
6:12
7:07
7:56
8:40
9:18
9:50
10:20
10:46
11:13
11:39
12:09
Moonset
2:56
3:40
4:32
5:29
6:29
7:32
8:35
9:37
10:40
11:44
12:50
Sunrise
6:50
6:50
6:52
6:52
6:52
6:52
6:54
6:54
6:54
6:54
6:54
6:56
Sunset
4:40
4:40
4:40
4:42
4:42
4:43
4:43
4:44
4:45
4:45
4:45
4:45
Today's sea temperature in Kosai-shi is
17.3° C
(Statistics for 18 Dec 1981-2005 – mean: 19.6 max: 21.2 min: 18.4°C)
Issued (local time): 8 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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