Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Saturday 23 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Amatu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Amatu sea temperature is
21.5° C
(Which is slightly warmer than usual)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 9AM is: 2.4m 9s primary swell from a East-northeast direction and 0.3m 7s secondary swell from a South direction, 0.3m 8s secondary swell from a Southwest direction (forecast issued at 02:00am May 23). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (23 May)8ft (2.4m)9s
Afternoon (23 May)7ft (2.1m)9s
Evening (23 May)6.5ft (2.0m)9s

Table - waves today at Amatu. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 4mm), mostly falling on Sat night. Warm (max 22°C on Mon morning, min 15°C on Sat morning). Winds decreasing (fresh winds from the NE on Sat morning, calm by Mon night).

Saturday
23
Sunday
24
Monday
25
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
2
2
!
2
1
1
2
2
3
2
0
0
0
0
0
0
2
2
2
2
1
1
0
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
2.5
ENE
9
2.5
ENE
9
3
ENE
9
2.4
ENE
9
2.3
ENE
9
2.1
ENE
9
2.2
ENE
9
2
E
9
2
E
9
1.9
E
9
1.5
E
10
1.5
E
10
1.4
E
9
1.3
ENE
9
1.3
ENE
9
1.2
ENE
9
1.6
ENE
9
1.5
ENE
9
1.5
ENE
9
1.5
ENE
10
1.6
SE
8
1.2
ENE
11
1.1
ENE
11
1.1
ENE
11
Wave Graph
Metric surfscale
Energy kJ
1093
1044
1363
1027
923
736
826
705
694
632
414
405
347
289
289
238
366
344
360
469
292
343
286
303
Wind (km/h)
30
NNE
25
NNE
30
NNE
30
NE
25
NE
25
ENE
20
ENE
15
ENE
15
E
15
E
10
ESE
20
ESE
20
ESE
20
ESE
15
ESE
10
ESE
10
E
10
E
10
ENE
15
E
15
E
15
E
15
ESE
5
ESE
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
High Tide
10:17PM1.20m
8:25AM1.17m
11:09PM1.19m
10:06AM1.06m
11:57PM1.21m
12:05PM1.03m
Low Tide
3:17AM0.93m
3:49PM0.35m
4:59AM0.85m
4:54PM0.49m
6:30AM0.72m
6:00PM0.60m
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
rain showers
rain showers
light rain
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:30
4:30
4:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:42
6:42
1
1
1
1
Temp °C
13
14
13
15
17
18
17
17
18
18
17
19
19
20
19
19
19
19
19
21
22
22
21
20
7
9
8
9
12
14
13
14
16
16
16
17
17
18
18
19
19
19
19
20
21
21
21
21
Swell 1
Height (m)
Direction
Period (s)
0.4
SSW
8
0.4
SW
8
2.3
ENE
9
0.3
S
7
0.3
SSW
7
0.3
S
7
1.9
E
9
1.8
E
9
1.7
E
10
1.7
E
10
1.5
E
10
1.5
E
10
1.4
E
9
1.3
ENE
9
1.3
ENE
9
1.2
ENE
9
1.5
SE
7
1.4
SE
7
1.5
SE
7
1.5
SE
8
1.6
SE
8
1.3
SE
8
1.4
SE
8
1.3
SE
8
Energy kJ
23
15
929
8
9
8
641
568
513
522
414
405
347
289
289
238
218
211
237
244
269
200
204
181
Swell 2
Height (m)
Direction
Period (s)
0.4
SW
8
0.3
SW
8
0.1
SE
7
0.3
SW
7
0.3
SSW
7
0.1
SW
7
0.3
S
6
0.1
SW
7
0.2
NNE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
11
1.2
ENE
9
1.2
ENE
9
1.2
ENE
10
1.1
ENE
11
1.1
ENE
11
1.2
ENE
11
1.1
ENE
11
1.1
ENE
11
Energy kJ
14
9
2
8
9
2
7
2
10
10
10
11
12
243
248
271
292
292
343
286
303
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
7
0.1
SW
7
0.1
SW
7
0.1
E
16
0.2
ESE
11
0.2
ESE
11
0.2
ESE
11
0.2
ESE
11
0.1
E
16
0.1
S
9
0.1
SW
9
0.3
SSW
8
Energy kJ
2
2
2
5
12
12
12
12
5
2
3
13
Wind waves
Height (m)
Direction
Period (s)
2.5
ENE
9
2.5
ENE
9
3
ENE
9
2.4
ENE
9
2.3
ENE
9
2.1
ENE
9
2.2
ENE
9
2
E
9
2
E
9
1.9
E
9
0.9
SE
6
1
SE
6
1
SE
6
1.2
SE
6
1.3
SE
7
1.4
SE
7
1.6
ENE
9
1.5
ENE
9
1.5
ENE
9
1.5
ENE
10
Energy kJ
1093
1044
1363
1027
923
736
826
705
694
632
49
66
75
116
144
183
366
344
360
469
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
3
2
4
2
2
2
2
2
2
2
1
2
1
1
1
2
2
Distance (km)
601
804
846
858
35
35
35
601
35
24
24
35
35
87
24
24
24
35
16
35
35
35
24
24
Best forecast wave conditions in Chiba
Rating
(10 max)
1
1
1
2
4
3
2
2
2
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
1
3
3
4
3
4
2
2
3
3
3
3
2
3
2
2
2
2
Header Global
Rating
(10 max)
6
7
6
5
5
6
7
8
7
6
5
5
5
5
5
5
5
5
5
5
4
5
5
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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