Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 8 am Sunday 31 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
21.8° C
(Which is normal for this time of year)

How big are the waves at Amatu today (31 May):

  • Morning surf: Morning surf (31 May, local time) - 3ft (0.9m), 10s period with E swell.
  • Afternoon surf: Afternoon surf (31 May, local time) - 3ft (0.9m), 10s period with ESE swell.
  • Evening surf: Evening surf (31 May, local time) - 2.5ft (0.8m), 12s period with S swell.

The current surf forecast for Amatu at 5PM is: 0.9m 10s primary swell from a East direction and 0.6m 12s secondary swell from a South direction, 0.6m 3s secondary swell from a South-southwest direction (forecast issued at 08:00am May 31). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (31 May)3ft (0.9m)10s
Afternoon (31 May)3ft (0.9m)10s
Evening (31 May)2.5ft (0.8m)12s

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 6mm), mostly falling on Tue night. Warm (max 24°C on Sun morning, min 19°C on Sun night). Mainly fresh winds.

Sunday
31
Monday
1
Tuesday
2
Wed
3
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
12 AM
3 AM
Rating
(10 max)
1
2
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
E
10
0.9
E
10
0.8
E
10
0.9
ESE
10
0.9
E
10
0.8
S
12
0.8
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.7
SSW
15
0.7
SSW
14
0.7
SSW
14
0.9
SSW
13
0.7
SSW
13
0.9
SSW
12
1.1
S
12
1.3
SSW
14
1.2
SSW
14
1.1
SW
13
1.1
SW
13
1.1
SW
13
0.9
SW
12
Wave Graph
Metric surfscale
Energy kJ
164
161
128
167
161
174
160
154
151
149
146
196
183
177
307
149
203
383
624
486
400
388
376
223
Wind (km/h)
5
SSW
5
SSW
5
SE
15
S
25
SW
30
SW
25
SW
20
SW
20
SW
15
SW
15
SSW
20
SSW
15
SSW
20
SSW
15
SSW
10
S
15
S
20
S
20
SSE
20
S
15
S
15
S
15
S
15
SSE
cross-on
glassy
glassy
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
cross-on
on
on
on
on
High Tide
3:25AM1.35m
5:46PM1.28m
3:56AM1.35m
6:25PM1.28m
4:28AM1.35m
7:03PM1.26m
Low Tide
10:33AM0.04m
10:45PM0.87m
11:07AM0.02m
11:20PM0.88m
11:42AM0.02m
11:56PM0.89m
part cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:26
4:26
4:26
4:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:46
6:47
6:47
Temp °C
20
22
24
24
23
20
19
19
19
22
23
23
21
21
21
20
21
21
22
22
22
21
21
20
21
23
25
24
21
15
16
18
18
22
22
22
20
20
20
20
21
20
21
21
22
21
21
20
Swell 1
Height (m)
Direction
Period (s)
0.9
E
10
0.9
E
10
0.8
E
10
0.9
ESE
10
0.9
E
10
0.8
S
12
0.8
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.9
S
10
0.7
S
10
0.8
S
12
0.9
SSW
13
0.7
SSW
13
0.9
SSW
12
1.1
S
12
1.3
SSW
14
1.2
SSW
14
1.1
SW
13
1.1
SW
13
1.1
SW
13
0.9
SW
12
Energy kJ
164
161
128
167
161
174
160
154
151
149
146
174
100
177
307
149
203
383
624
486
400
388
376
223
Swell 2
Height (m)
Direction
Period (s)
0.6
SSE
6
0.5
S
6
0.5
S
13
0.5
S
12
0.7
S
12
0.8
E
10
0.8
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
E
10
0.7
S
11
0.7
SW
14
0.6
E
10
0.6
E
10
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
Energy kJ
25
15
92
72
139
125
125
94
94
92
90
90
87
89
89
112
191
65
64
62
61
60
60
60
Swell 3
Height (m)
Direction
Period (s)
0.3
SW
6
0.3
S
14
0.5
S
6
0.4
SSW
14
0.3
SSW
14
0.3
SE
12
0.2
SSE
12
0.3
SE
12
0.3
SE
12
0.5
SSE
5
0.4
SSW
16
0.7
SSW
15
0.7
SSW
14
0.7
SSW
14
0.4
SW
16
0.6
E
10
0.6
E
10
0.6
SW
15
0.3
SE
12
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.6
SW
16
Energy kJ
7
33
16
69
39
23
15
21
23
13
99
196
183
168
96
65
64
181
21
20
20
20
20
161
Wind waves
Height (m)
Direction
Period (s)
0.4
SW
4
0.4
SSW
3
0.6
SSW
3
1.3
SSW
6
1.3
SSW
6
1.2
SSW
6
0.9
SSW
5
0.6
SW
5
0.6
SSW
5
0.5
SW
4
0.5
S
3
0.4
S
3
0.4
SSE
4
0.6
SSE
4
0.5
SSE
4
0.5
SSE
4
0.5
SSE
4
0.9
SSE
4
1.1
SSE
5
1.3
SSE
6
1.2
SSE
6
1.2
SSE
6
Energy kJ
4
2
9
107
108
84
50
18
17
9
6
4
4
14
11
10
9
28
69
98
87
93
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
1
2
2
1
2
1
2
2
2
3
2
1
2
2
2
2
2
2
2
2
1
Distance (km)
6
0
0
24
2825
567
87
73
75
43
24
24
127
24
87
24
24
24
24
24
24
24
24
24
Best forecast wave conditions in Chiba
Rating
(10 max)
2
2
2
1
2
2
2
2
2
2
2
2
2
2
2
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
3
2
3
3
4
4
3
4
4
4
4
4
4
4
2
4
4
3
3
3
Header Global
Rating
(10 max)
7
7
7
7
7
6
5
5
5
5
5
5
5
4
5
9
5
5
5
8
5
6
4
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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