Katsuura Sea Conditions and Tide Table

Katsuura 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 06:39 AM and sunset is at 04:28 PM.

Days 1–3 Weather Summary

Light rain (total 3mm), mostly falling on Sat night. Cool air temperatures (max 19°C on Sat afternoon, min 10°C on Thu morning). Winds increasing (light winds from the E on Fri morning, fresh winds from the SSW by Sat night).

Days 4–6 Weather Summary

Heavy rain (total 24mm), heaviest during Sun afternoon. Cool air temperatures (max 18°C on Sun morning, min 9°C on Mon night). Winds decreasing (strong winds from the NE on Sun night, calm by Tue night).

Days 7–9 Weather Summary

Moderate rain (total 13mm), heaviest on Wed night. Very mild (max 18°C on Wed night, min 8°C on Thu night). Mainly fresh winds.

Days 10–12 Weather Summary

Heavy rain (total 32mm), heaviest during Sat night. Very mild (max 16°C on Sat night, min 5°C on Mon night). Winds decreasing (near gales from the NNW on Mon morning, light winds from the NW by Tue morning).

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
2:18PM1.36m
5:07AM1.27m
2:55PM1.39m
5:40AM1.29m
3:32PM1.42m
6:13AM1.30m
4:09PM1.43m
6:45AM1.30m
4:45PM1.43m
7:17AM1.29m
5:23PM1.40m
7:50AM1.29m
6:03PM1.35m
8:22AM1.29m
6:49PM1.26m
8:56AM1.30m
7:45PM1.16m
9:30AM1.30m
9:03PM1.05m
10:07AM1.31m
10:56PM0.99m
10:48AM1.31m
1:13AM1.03m
Low Tide
9:04AM1.00m
9:47PM0.14m
9:44AM1.00m
10:22PM0.10m
10:19AM0.99m
10:57PM0.07m
10:52AM0.98m
11:32PM0.06m
11:27AM0.96m
00:07AM0.08m
12:05PM0.95m
00:41AM0.13m
12:48PM0.92m
1:15AM0.20m
1:39PM0.89m
1:50AM0.30m
2:38PM0.83m
2:28AM0.43m
3:48PM0.75m
3:11AM0.59m
5:04PM0.63m
4:05AM0.75m
6:17PM0.48m
Wave
height (m) 
direction
period (s) 
1.3
ENE
17
1.4
ENE
16
1.5
ENE
15
1.1
ENE
14
1
ENE
13
1.3
ENE
12
1.5
SE
5
1.5
SSE
6
1.8
SSE
6
2.2
SSE
7
2.2
SSE
7
2.1
SE
8
2.5
E
8
3
E
9
2.5
E
10
2
E
9
1.7
E
8
1.4
E
8
1.5
E
7
1.7
E
9
2.1
E
12
2
E
11
2.4
ESE
10
3
ENE
9
3
ENE
10
2.5
ENE
10
2.3
ENE
10
2
E
12
2.1
E
13
2.5
E
7
3
ESE
9
3
ESE
10
2.1
E
10
2.5
ENE
12
2.5
NE
8
2
ENE
12
clear
cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
rain showers
mod rain
heavy rain
part cloud
cloud
part cloud
clear
part cloud
part cloud
cloud
part cloud
cloud
heavy rain
light rain
cloud
part cloud
clear
clear
cloud
cloud
rain showers
heavy rain
light rain
part cloud
cloud
cloud
part cloud
clear
clear
cloudy
some clouds
cloudy
cloudy
some clouds
cloudy
cloudy
rain shwrs
mod rain
heavy rain
some clouds
cloudy
some clouds
clear
some clouds
some clouds
cloudy
some clouds
cloudy
heavy rain
light rain
cloudy
some clouds
clear
clear
cloudy
cloudy
rain shwrs
heavy rain
light rain
some clouds
cloudy
cloudy
some clouds
clear
 km/h
20
NNE
15
NE
15
NE
10
NNE
10
SSE
25
S
30
S
30
S
35
S
40
SSW
35
SSW
20
WSW
40
NNE
35
NE
25
NE
25
NNE
20
NE
5
NNE
15
SSE
25
S
35
SSW
25
NNW
35
NNE
35
NNE
35
NE
30
NE
20
NNE
20
NNE
20
ENE
40
ESE
30
NW
45
NNW
45
NW
60
NNW
55
NNW
45
NNW
 mm 
3
9
15
11
2
1
29
2
max°C
11
11
11
13
15
17
18
19
19
18
18
18
11
10
10
11
12
12
16
17
18
13
13
11
10
10
11
12
13
16
12
11
12
9
8
6
Moonrise
5:03
6:02
6:57
7:46
8:30
9:07
9:40
10:09
10:35
11:01
11:28
11:57
Moonset
2:43
3:27
4:19
5:16
6:17
7:19
8:22
9:25
10:28
11:32
12:38
Sunrise
6:39
6:41
6:41
6:41
6:43
6:43
6:43
6:43
6:45
6:45
6:45
6:46
Sunset
4:28
4:29
4:29
4:30
4:30
4:30
4:30
4:31
4:31
4:32
4:34
4:34
Today's sea temperature in Katsuura is
20.1° C
(Statistics for 18 Dec 1981-2005 – mean: 19.2 max: 20.3 min: 17.8°C)
Issued (local time): 8 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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