Sirahama (Izu) Sea Conditions and Tide Table

Sirahama (Izu) 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 06:45 AM and sunset is at 04:35 PM.

Days 1–3 Weather Summary

Heavy rain (total 82mm), heaviest during Sun morning. Cool air temperatures (max 18°C on Sun afternoon, min 10°C on Fri morning). Wind will be generally light.

Days 4–6 Weather Summary

Moderate rain (total 19mm), heaviest on Wed afternoon. Cool air temperatures (max 17°C on Wed afternoon, min 7°C on Mon night). Mainly fresh winds.

Days 7–9 Weather Summary

Heavy rain (total 38mm), heaviest during Sat night. Very mild (max 11°C on Thu morning, min 6°C on Thu night). Mainly fresh winds.

Days 10–12 Weather Summary

Heavy rain (total 22mm), heaviest during Tue night. Very mild (max 14°C on Sun afternoon, min 7°C on Tue night). Winds increasing (calm on Mon night, fresh winds from the NNE by Tue night).

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
3:32PM1.54m
6:07AM1.53m
4:06PM1.54m
6:42AM1.56m
4:41PM1.54m
7:17AM1.58m
5:16PM1.53m
7:52AM1.57m
5:55PM1.51m
8:26AM1.54m
6:38PM1.47m
9:00AM1.49m
7:28PM1.41m
9:33AM1.45m
8:29PM1.33m
10:08AM1.41m
9:49PM1.24m
10:44AM1.39m
11:36PM1.20m
11:24AM1.39m
1:37AM1.24m
12:12PM1.41m
3:10AM1.35m
Low Tide
10:08AM1.09m
10:43PM0.06m
10:49AM1.09m
11:16PM0.01m
11:29AM1.09m
11:51PM-0.01m
12:08PM1.09m
00:26AM0.01m
12:47PM1.07m
1:03AM0.06m
1:28PM1.03m
1:42AM0.16m
2:13PM0.98m
2:24AM0.29m
3:07PM0.90m
3:10AM0.45m
4:09PM0.80m
4:04AM0.63m
5:20PM0.66m
5:08AM0.81m
6:31PM0.50m
6:22AM0.96m
7:37PM0.31m
Wave
height (m) 
direction
period (s) 
1
ENE
14
0.8
ENE
14
0.7
ENE
13
1.1
SE
6
1
SE
6
1.6
SSE
6
2
S
7
1.7
S
8
1.9
WSW
6
2.3
NE
6
1.7
ESE
9
1.8
E
10
1.7
ENE
6
1.4
ENE
5
1.1
E
8
1.2
E
7
1.7
SSE
6
2.1
SSE
8
2.3
SW
7
1.8
SSE
7
1.6
E
10
1.9
ENE
6
1.6
E
9
1.5
E
14
1.7
E
14
1.9
ENE
5
2.3
ESE
7
2.5
S
9
2.5
WSW
7
2
W
8
1.4
E
10
1.3
E
11
1.2
E
10
1.1
E
12
1.5
NE
5
2.5
ENE
7
part cloud
part cloud
rain showers
light rain
light rain
heavy rain
heavy rain
rain showers
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
cloud
heavy rain
rain showers
part cloud
cloud
part cloud
clear
clear
part cloud
cloud
light rain
rain showers
rain showers
clear
clear
cloud
light rain
rain showers
part cloud
light rain
heavy rain
some clouds
some clouds
rain shwrs
light rain
light rain
heavy rain
heavy rain
rain shwrs
some clouds
some clouds
some clouds
some clouds
clear
some clouds
some clouds
cloudy
heavy rain
rain shwrs
some clouds
cloudy
some clouds
clear
clear
some clouds
cloudy
light rain
rain shwrs
rain shwrs
clear
clear
cloudy
light rain
rain shwrs
some clouds
light rain
heavy rain
 km/h
15
NE
10
ENE
0
E
10
SW
5
NNW
20
SSW
15
W
15
WSW
5
NNW
25
NE
20
NE
20
NE
20
NE
15
NE
15
NE
10
ENE
25
S
10
WNW
25
ENE
15
NE
15
NNE
25
NNE
20
NE
15
NE
20
NNE
20
NNE
30
NE
15
W
15
W
10
NW
5
N
10
ENE
10
NNE
15
NNE
25
NE
35
NNE
 mm 
2
4
5
41
29
1
11
8
2
36
1
1
3
1
16
max°C
13
12
16
15
15
17
16
18
15
11
11
11
9
10
11
15
17
17
11
10
10
9
9
7
9
8
10
13
14
11
13
11
10
10
10
9
Moonrise
6:06
7:01
7:51
8:34
9:12
9:45
10:14
10:41
11:07
11:34
12:03
12:37
Moonset
3:34
4:25
5:22
6:23
7:26
8:28
9:31
10:33
11:37
12:43
1:53
Sunrise
6:45
6:46
6:46
6:47
6:47
6:48
6:48
6:48
6:48
6:48
6:50
6:50
Sunset
4:35
4:36
4:36
4:37
4:37
4:37
4:37
4:38
4:38
4:39
4:40
4:40
Today's sea temperature in Sirahama (Izu) is
18.4° C
(Statistics for 19 Dec 1981-2005 – mean: 19.6 max: 21.0 min: 18.5°C)
Issued (local time): 2 am Friday 19 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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