Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 8 pm Wednesday 13 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
18.0° C
(Which is 2.3°C colder than average for this time of year)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 3AM is: 1.6m 10s primary swell from a East-southeast direction and 0.1m 10s secondary swell from a Northeast direction (forecast issued at 08:00pm May 13). The wind direction is predicted to be cross-offshore and the swell rating is 2.

Time (JST) & DateWave HeightWave Period
Morning (14 May)5ft (1.5m)10s
Afternoon (14 May)4.5ft (1.4m)9s
Evening (14 May)5ft (1.6m)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 2mm), mostly falling on Wed night. Warm (max 21°C on Thu morning, min 15°C on Thu night). Wind will be generally light.

Wed
13
Thursday
14
Friday
15
Saturday
16
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
Rating
(10 max)
2
3
2
2
2
2
0
0
0
1
1
1
1
1
0
0
0
1
2
2
2
1
0
0
Swell
Height Map
Height MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.7
ESE
10
1.7
ESE
10
1.6
ESE
10
1.6
ESE
10
1.6
ESE
10
1.5
ESE
10
1.5
ESE
9
1.4
ESE
9
1.6
E
9
1.6
E
9
1.4
E
9
1.3
E
9
1.5
E
9
1.5
ENE
9
1.6
ENE
9
1.5
E
9
1.4
E
9
1.3
E
9
1.2
E
9
1.2
E
9
1.1
E
9
0.9
E
9
0.8
E
9
0.8
E
9
Wave Graph
Metric surfscale
Energy kJ
539
561
471
471
461
383
367
307
427
425
339
300
388
360
409
388
332
274
235
230
194
127
106
108
Wind (km/h)
10
E
10
NNE
5
NE
10
NNE
10
NE
10
NE
20
ENE
25
ENE
25
ENE
25
NE
20
NNE
20
NE
25
NE
25
NE
25
ENE
20
ENE
15
ENE
10
ENE
10
NE
10
NNE
10
NNE
15
ENE
15
E
15
ESE
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross
cross-on
High Tide
2:01AM1.30m
3:03PM1.26m
2:33AM1.36m
3:59PM1.35m
3:05AM1.42m
Low Tide
7:54PM0.54m
8:35AM0.26m
8:44PM0.61m
9:16AM0.06m
9:31PM0.69m
9:58AM-0.11m
thunderstorm
thunderstorm
clear
clear
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:37
4:35
4:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:32
6:34
6:35
6:36
1
2
Temp °C
20
18
18
17
17
20
21
20
17
16
16
15
15
16
17
18
17
18
17
17
17
20
21
21
21
18
18
16
17
19
19
17
14
12
13
11
11
12
13
15
15
17
16
16
16
19
20
20
Swell 1
Height (m)
Direction
Period (s)
1.7
ESE
10
1.7
ESE
10
1.6
ESE
10
1.6
ESE
10
1.6
ESE
10
1.5
ESE
10
1.5
ESE
9
1.4
ESE
9
1.6
E
9
1.6
E
9
1.4
E
9
1.3
E
9
0.3
SE
12
0.6
SE
10
0.5
SE
9
0.4
SE
10
0.4
SE
9
1.3
E
9
1.2
E
9
1.2
E
9
1.1
E
9
0.9
E
9
0.8
E
9
0.8
SE
7
Energy kJ
539
561
471
471
461
383
367
307
427
425
339
300
21
57
42
34
30
274
235
230
194
127
106
67
Swell 2
Height (m)
Direction
Period (s)
0.1
NE
10
0.1
NE
10
0.1
NE
10
0.1
NE
10
0.1
NE
10
0.1
S
7
0.1
S
7
0.2
NNE
10
0.2
NNE
10
0.1
S
7
0.1
SE
10
0.1
SE
12
0.2
SSE
12
0.3
SE
12
0.3
SE
11
0.5
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
7
0.8
SE
9
0.7
SE
7
0.8
E
9
Energy kJ
4
4
4
4
4
1
1
10
10
1
4
6
15
22
20
37
27
28
19
95
48
108
Swell 3
Height (m)
Direction
Period (s)
0.1
S
8
0.1
S
9
0.1
S
9
0.1
S
7
0.1
NE
10
0.1
SE
16
0.1
S
7
0.1
S
7
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
12
0.3
ESE
9
0.3
ESE
9
Energy kJ
1
2
2
1
4
10
1
1
19
19
19
19
22
16
16
Wind waves
Height (m)
Direction
Period (s)
0.3
ENE
3
0.6
ENE
4
0.9
ENE
4
0.1
NE
10
0.9
NE
5
0.9
NE
5
1.5
E
9
1.5
ENE
9
1.6
ENE
9
1.5
E
9
1.4
E
9
0.4
NE
7
Energy kJ
1
11
32
4
32
40
388
360
409
388
332
11
Nearest Offshore or Glassy
Rating
(10 max)
1
3
2
2
2
2
1
1
1
1
2
1
2
1
1
2
1
2
2
2
2
1
1
1
Distance (km)
35
0
0
0
0
0
35
87
87
35
190
190
190
537
2839
35
87
16
0
0
0
16
40
24
Best forecast wave conditions in Chiba
Rating
(10 max)
2
3
2
2
2
2
2
1
2
2
2
2
2
1
1
2
Best forecast wave conditions in Japan
Rating
(10 max)
2
3
2
2
2
2
2
1
2
2
2
3
2
2
2
1
2
2
3
3
2
1
2
Header Global
Rating
(10 max)
8
7
7
9
9
9
9
9
5
5
5
5
5
5
5
5
5
5
5
5
5
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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