Hikawa (Yonakuni Sima) Sea Conditions and Tide Table

Hikawa (Yonakuni Sima) 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 07:24 AM and sunset is at 06:02 PM.

Days 1–3 Weather Summary

Heavy rain (total 70mm), heaviest during Fri night. Warm air temperatures (max 24°C on Fri morning, min 19°C on Sun night). Winds increasing (calm on Fri night, near gales from the NNE by Sun afternoon).

Days 4–6 Weather Summary

Moderate rain (total 17mm), heaviest on Tue night. Warm air temperatures (max 24°C on Tue night, min 19°C on Wed afternoon). Winds increasing (light winds from the ENE on Tue night, near gales from the NNE by Wed afternoon).

Days 7–9 Weather Summary

Moderate rain (total 13mm), heaviest on Thu afternoon. Warm (max 20°C on Fri afternoon, min 18°C on Thu morning). Mainly strong winds.

Days 10–12 Weather Summary

Mostly dry. Very mild (max 19°C on Sun afternoon, min 13°C on Tue afternoon). Winds decreasing (near gales from the N on Mon night, light winds from the NE by Wed morning).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
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
7:31AM1.23m
6:17PM1.54m
8:11AM1.25m
6:56PM1.58m
8:49AM1.25m
7:36PM1.59m
9:25AM1.24m
8:16PM1.57m
10:01AM1.23m
8:57PM1.52m
10:37AM1.21m
9:42PM1.43m
11:14AM1.20m
10:30PM1.33m
11:54AM1.19m
11:27PM1.20m
12:38PM1.19m
00:40AM1.09m
1:27PM1.20m
2:15AM1.00m
2:21PM1.23m
4:00AM0.99m
3:17PM1.27m
5:25AM1.04m
Low Tide
12:28PM0.74m
1:26AM-0.07m
1:07PM0.73m
2:05AM-0.11m
1:45PM0.72m
2:43AM-0.10m
2:24PM0.70m
3:21AM-0.05m
3:05PM0.68m
3:59AM0.02m
3:49PM0.66m
4:38AM0.13m
4:38PM0.64m
5:19AM0.25m
5:36PM0.62m
6:02AM0.39m
6:46PM0.59m
6:52AM0.52m
8:08PM0.52m
7:51AM0.63m
9:29PM0.42m
9:00AM0.72m
10:37PM0.29m
Wave
height (m) 
direction
period (s) 
1.6
E
6
1.3
E
6
1.3
E
7
1.1
ESE
5
1.1
SE
7
1
ESE
8
1.5
NNE
5
3.5
N
8
3.5
NNE
9
3
NNE
9
2.5
NNE
9
2.1
NE
8
1.6
NE
8
1.4
NE
8
1.1
NE
7
1.8
NE
6
3
NNE
8
3.5
NNE
9
3
NNE
9
2.5
NNE
8
2.4
NNE
8
2
NNE
8
1.7
NNE
8
1.4
NNE
8
1.3
NNE
7
1.4
NNE
7
2
NNE
7
1.8
NNE
7
1.5
NNE
7
1.3
NNE
7
1.4
NNE
5
1.3
NNE
6
1.6
NNE
6
3
N
8
3
N
10
2.5
N
10
cloud
light rain
heavy rain
heavy rain
light rain
part cloud
light rain
light rain
light rain
light rain
light rain
rain showers
clear
clear
rain showers
light rain
cloud
light rain
light rain
light rain
light rain
cloud
part cloud
part cloud
part cloud
light rain
light rain
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
cloudy
light rain
heavy rain
heavy rain
light rain
some clouds
light rain
light rain
light rain
light rain
light rain
rain shwrs
clear
clear
rain shwrs
light rain
cloudy
light rain
light rain
light rain
light rain
cloudy
some clouds
some clouds
some clouds
light rain
light rain
cloudy
cloudy
some clouds
clear
clear
clear
clear
clear
clear
 km/h
30
SSE
30
SE
25
ESE
10
E
25
E
20
NE
40
NNE
55
NNE
50
NE
40
NE
35
ENE
30
ENE
20
ENE
15
E
10
ENE
40
NE
50
NNE
50
NNE
45
NNE
40
NNE
35
NNE
30
NNE
30
NNE
25
NNE
25
NNE
30
NNE
40
NNE
35
NNE
30
NNE
30
NNE
35
N
30
N
40
N
50
N
45
N
35
NNE
 mm 
3
40
15
5
1
2
4
1
2
1
4
5
4
2
3
2
2
4
max°C
24
23
22
20
22
23
22
21
20
21
21
22
22
23
24
22
20
19
18
18
19
19
20
20
20
20
20
18
19
19
18
18
19
14
14
15
Moonrise
6:41
7:35
8:26
9:12
9:54
10:32
11:07
11:40
12:12
12:45
1:21
2:02
Moonset
5:12
6:04
6:59
7:56
8:54
9:51
10:47
11:43
12:40
1:40
2:43
Sunrise
7:24
7:26
7:26
7:26
7:26
7:28
7:28
7:28
7:28
7:30
7:30
7:30
Sunset
6:02
6:02
6:04
6:04
6:05
6:05
6:06
6:07
6:07
6:07
6:07
6:08
Today's sea temperature in Hikawa (Yonakuni Sima) is
25.8° C
(Statistics for 19 Dec 1981-2005 – mean: 23.9 max: 25.3 min: 22.7°C)
Issued (local time): 2 am Friday 19 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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