Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Thursday 28 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
21.7° C
(Which is normal for this time of year)

How big are the waves at Amatu today (28 May):

  • Morning surf: Morning surf (28 May, local time) - 4ft (1.2m), 8s period with ESE swell.
  • Afternoon surf: Afternoon surf (28 May, local time) - 4.5ft (1.4m), 8s period with ESE swell.
  • Evening surf: Evening surf (28 May, local time) - 4ft (1.2m), 9s period with ESE swell.

The current surf forecast for Amatu at 7AM is: 1.2m 8s primary swell from a East-southeast direction and 0.4m 10s secondary swell from a East-northeast direction (forecast issued at 02:00am May 28). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (28 May)4ft (1.2m)8s
Afternoon (28 May)4.5ft (1.4m)8s
Evening (28 May)4ft (1.2m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Thu morning. Warm (max 25°C on Fri morning, min 17°C on Fri night). Wind will be generally light.

Thursday
28
Friday
29
Saturday
30
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)
0
0
0
0
0
0
0
0
0
0
1
1
2
0
0
0
1
0
1
1
0
0
0
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.1
ESE
8
1.2
ESE
8
1.2
ESE
8
1.2
ESE
8
1.2
ESE
8
1.4
ESE
8
1.3
ESE
8
1.2
ESE
9
1.3
E
10
1.6
SSW
7
1.7
SSW
7
1.6
SSW
7
1.9
SW
7
1
E
10
1.1
E
9
1.4
E
9
1.5
E
11
0.9
ESE
11
0.9
ESE
11
0.9
ESE
11
0.9
ESE
11
0.9
E
11
0.9
E
10
0.9
E
10
Wave Graph
Metric surfscale
Energy kJ
171
197
197
202
202
261
227
238
306
251
311
272
394
197
202
339
498
191
194
194
191
181
177
174
Wind (km/h)
15
SW
15
SSW
15
SSW
15
S
20
SSE
20
S
15
SSW
20
SSW
20
SW
25
WSW
15
WSW
10
WSW
10
SW
20
E
25
E
25
E
30
NE
25
NE
10
ENE
10
ESE
10
S
15
S
10
S
10
S
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross
cross
cross
cross-off
cross-off
cross
cross-on
on
on
on
cross-on
High Tide
1:53AM1.31m
3:39PM1.20m
2:25AM1.33m
4:25PM1.25m
2:55AM1.34m
5:06PM1.28m
Low Tide
8:52AM0.28m
8:46PM0.79m
9:27AM0.17m
9:29PM0.82m
10:00AM0.09m
clear
clear
part cloud
cloud
light rain
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
cloud
clear
part cloud
cloud
part cloud
cloud
clear
clear
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:28
4:26
4:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
1
Temp °C
22
20
21
22
22
23
23
23
23
22
22
25
25
22
22
22
20
17
20
23
24
24
22
21
23
20
21
23
23
24
25
24
24
21
23
28
27
21
20
20
17
13
18
22
23
23
23
22
Swell 1
Height (m)
Direction
Period (s)
1.1
ESE
8
1.2
ESE
8
1.2
ESE
8
1.2
ESE
8
1.2
ESE
8
1.4
ESE
8
1.3
ESE
8
1.2
ESE
9
1.3
E
10
1.1
E
9
1.1
E
9
1
E
9
1.5
SSW
7
1.4
SSW
7
1.3
SSW
7
1.1
SSW
7
0.9
SSW
7
0.9
ESE
11
0.9
ESE
11
0.9
ESE
11
0.9
ESE
11
0.9
E
11
0.9
E
10
0.9
E
10
Energy kJ
171
197
197
202
202
261
227
238
306
212
217
176
222
197
172
111
84
191
194
194
191
181
177
174
Swell 2
Height (m)
Direction
Period (s)
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.1
S
16
0.4
NE
11
0.4
NE
12
0.4
NE
11
1
E
9
1
E
10
0.3
NE
11
0.3
NE
11
0.1
S
14
0.7
SW
7
0.5
S
6
0.5
S
6
0.6
S
6
0.6
SSE
6
0.7
SSE
6
0.8
SE
6
Energy kJ
42
41
41
42
42
42
42
40
5
31
36
33
180
184
19
19
4
50
21
20
29
31
34
51
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.1
W
9
0.4
SW
8
0.1
S
16
0.1
S
16
0.1
SE
9
0.1
S
15
0.4
NE
12
0.4
NE
12
0.1
S
14
0.1
S
14
0.1
S
14
0.4
SSE
7
0.5
SW
7
0.4
SW
7
0.4
SW
7
0.3
SW
7
0.5
E
4
0.3
SW
7
Energy kJ
18
17
17
17
16
16
2
18
5
5
3
4
35
35
4
4
4
17
24
17
12
7
10
8
Wind waves
Height (m)
Direction
Period (s)
0.4
SW
3
0.5
SSW
4
0.7
S
4
0.8
SSW
5
1
S
6
1.3
SSW
7
1.6
SSW
7
1.7
SSW
7
1.6
SSW
7
1.9
SW
7
1.1
E
9
1.4
E
9
1.5
E
11
1.3
ENE
5
1
ENE
5
0.8
ENE
5
0.6
ENE
5
0.5
E
4
Energy kJ
2
7
18
35
78
161
251
311
272
394
202
339
498
92
54
28
17
9
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
2
2
2
2
2
2
2
3
2
3
2
1
1
1
1
2
2
2
2
2
2
Distance (km)
35
96
126
24
30
24
24
30
35
30
6
6
24
35
126
53
538
35
16
24
24
24
24
24
Best forecast wave conditions in Chiba
Rating
(10 max)
2
2
2
2
2
2
2
2
3
3
3
2
1
2
2
2
2
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
3
2
2
2
2
2
2
2
2
2
3
3
3
2
1
2
1
1
2
2
2
2
2
2
Header Global
Rating
(10 max)
9
7
6
9
9
9
8
9
8
7
7
6
5
5
5
5
4
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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