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Surf Forecasts:

Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Tuesday 19 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
20.8° C
 (Which is normal for this time of year)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 8AM is: 0.8m 10s primary swell from a East direction and 0.6m 8s secondary swell from a Southeast direction, 0.6m 3s secondary swell from a South-southwest direction (forecast issued at 02:00am May 19). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (19 May)2.5ft (0.7m)10s
Afternoon (19 May)2.5ft (0.7m)10s
Evening (19 May)2.5ft (0.7m)11s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast

Moderate rain (total 18mm), heaviest on Thu afternoon. Warm (max 23°C on Wed morning, min 15°C on Thu night). Winds increasing (calm on Thu morning, fresh winds from the NNE by Thu night).

Tuesday
19
Wednesday
20
Thursday
21
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
0
0
0
0
0
0
0
0
0
2
2
3
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.8
E
8
0.7
SE
10
0.8
E
10
0.7
E
10
0.7
E
9
0.7
E
10
0.7
E
10
0.7
SE
11
0.8
SE
11
0.9
SE
10
0.7
SE
10
0.8
SE
10
0.8
SE
10
0.9
ESE
10
0.9
ESE
10
0.8
SE
10
0.9
ESE
10
0.9
ESE
10
0.9
ESE
10
0.9
ESE
10
1.2
S
7
1.7
SSW
7
1.3
SSW
8
1.2
S
7
Wave Graph
Metric surfscale
Energy kJ
90
104
117
92
87
90
90
110
134
184
104
124
127
164
161
117
157
157
142
159
128
293
196
159
Wind (km/h)
15
SSW
20
SSW
20
SW
20
SW
25
SSW
25
SSW
20
SSW
20
SSW
20
SW
20
SW
20
SW
20
SW
25
SW
25
SW
20
SW
15
SW
15
SW
15
SW
10
SW
5
WNW
5
ENE
15
NW
25
NNE
25
NNE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
glassy
off
cross-off
cross-off
High Tide
4:56AM1.49m
7:37PM1.34m
5:38AM1.46m
8:31PM1.28m
6:24AM1.39m
Low Tide
11:41PM0.90m
12:15PM-0.22m
00:22AM0.94m
1:04PM-0.13m
1:07AM0.96m
1:55PM0.02m
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
cloud
cloud
cloud
part cloud
part cloud
light rain
light rain
light rain
light rain
light rain
light rain
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
4:33
—
—
—
—
—
—
—
4:31
—
—
—
—
—
—
—
4:31
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
—
—
6:37
—
—
—
—
—
—
—
6:38
—
—
—
—
—
—
—
6:39
—
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
1
2
3
2
3
4
—
Temp °C
19
19
19
21
22
22
20
20
20
19
20
22
23
23
21
21
21
21
21
20
19
18
16
15
Feels °C
19
18
18
19
20
20
19
19
19
17
20
20
21
22
21
21
22
22
23
23
21
17
13
11
Swell 1
Height (m)
Direction
Period (s)
0.8
E
8
0.7
SE
10
0.8
E
10
0.7
E
10
0.7
E
9
0.7
E
10
0.7
E
10
0.7
E
10
0.8
SE
11
0.9
SE
10
0.7
SE
10
0.8
SE
10
0.8
SE
10
0.9
ESE
10
0.9
ESE
10
0.8
SE
10
0.9
ESE
10
0.9
ESE
10
0.9
ESE
10
0.9
S
6
1.2
S
7
1.4
SSW
7
1.3
SSW
8
1.2
S
7
Energy kJ
90
104
117
92
87
88
90
92
134
184
104
124
127
164
161
117
157
157
142
50
128
197
196
159
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
10
0.6
E
8
0.6
SE
8
0.6
SE
8
0.6
SE
10
0.6
SE
11
0.6
SE
11
0.7
SE
11
0.6
E
10
0.6
E
10
0.6
E
10
0.6
E
10
0.5
E
10
0.3
NE
8
0.3
NE
8
0.5
E
9
0.2
ENE
8
0.2
ENE
8
0.2
ENE
8
0.9
ESE
10
0.8
ESE
10
0.8
ESE
10
0.7
ESE
10
0.6
ESE
10
Energy kJ
35
45
48
48
77
90
90
110
71
71
70
70
52
11
11
40
6
6
6
145
105
105
81
71
Swell 3
Height (m)
Direction
Period (s)
0.4
SE
7
0.4
E
9
0.2
ENE
9
0.2
ENE
9
0.2
ENE
9
0.1
NE
9
0.2
ENE
9
0.3
NE
9
0.3
NE
10
0.3
NE
9
0.5
SSE
5
0.3
NE
8
0.3
NE
8
—
—
0.2
ENE
8
0.1
S
8
0.1
S
8
—
0.2
ENE
8
—
0.6
NE
6
0.1
E
11
—
Energy kJ
12
28
8
8
8
3
8
13
14
13
13
11
11
—
—
6
1
1
—
6
—
25
2
—
Wind waves
Height (m)
Direction
Period (s)
0.4
SSW
3
0.4
SSW
3
0.5
SSW
3
0.6
SSW
3
0.6
SSW
3
0.7
SSW
4
0.7
SSW
4
0.7
SSW
4
0.6
SW
4
0.7
SW
4
0.7
WSW
4
0.8
SW
4
0.7
SW
4
0.7
SW
4
0.7
SSW
4
0.5
SSW
4
0.4
SSW
4
0.4
SSW
4
0.7
S
5
1.5
SSW
6
0.4
NE
7
1.7
SSW
7
0.8
NE
6
1.4
NE
6
Energy kJ
3
3
6
7
8
11
11
11
10
14
13
17
15
16
14
9
6
5
23
159
18
293
54
151
Nearest Offshore or Glassy
Shimoda Yamatoken (Tatado Hama)
Shizuoka
Sakawa River
Kanagawa
Sakawa River
Kanagawa
Shimoda Yamatoken (Tatado Hama)
Shizuoka
Takegashima
Shikoku
Takegashima
Shikoku
Hashikui Bay
Shikoku
Sakawa River
Kanagawa
Sakawa River
Kanagawa
Sakawa River
Kanagawa
Tsurigasaki Surfing Beach (Tokyo 2020)
Chiba
Tsurigasaki Surfing Beach (Tokyo 2020)
Chiba
Kaiser's (Hachijojima Island)
Izu Islands
Shimoda Yamatoken (Tatado Hama)
Shizuoka
Shimoda Yamatoken (Tatado Hama)
Shizuoka
Sakawa River
Kanagawa
Torami
Chiba
Ohara
Chiba
Izumi
Chiba
Amatu
Chiba
Amatu
Chiba
Amatu
Chiba
Kisami-Ohama Beach
Shizuoka
Kugenuma Rivermouth
Kanagawa
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
2
2
3
2
1
Distance (km)
126
96
96
126
567
567
540
96
96
96
30
30
231
126
126
96
35
24
29
0
0
0
127
69
Best forecast wave conditions in Chiba
Tsurigasaki Surfing Beach (Tokyo 2020)
Tsurigasaki Surfing Beach (Tokyo 2020)
Choshi
Katagai
Tsurigasaki Surfing Beach (Tokyo 2020)
Chikura
Chikura
Chikura
Rating
(10 max)
1
2
1
1
1
2
3
3
Best forecast wave conditions in Japan
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Takegashima
Shikoku
Takegashima
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Takegashima
Shikoku
Chikura
Chiba
Chikura
Chiba
Chikura
Chiba
Kaifu Rivermouth
Shikoku
Niyodo Rivermouth
Shikoku
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
3
3
2
3
Header Global
Horizonte (Mar del Plata)
Argentina
San Jorge - Faja dos Cubres
Portugal
Back Bommie
Australia
Back Bommie
Australia
Avalon-North
Australia
Black Rock
Australia
Bankvaults
Indonesia
Bankvaults
Indonesia
Riozinho
Brazil
Bali Village
Indonesia
Boneyard
Australia
Cavalos de Fao
Portugal
Cavalos de Fao
Portugal
Arrifana
Portugal
Canal
Brazil
Canal
Brazil
Anglet - Corsaires
France
Trial Harbour
Australia
Gas Bay
Australia
Afife
Portugal
Anglet - Corsaires
France
Lambe Lambe
Brazil
Lambe Lambe
Brazil
Barra de Guaratiba
Brazil
Rating
(10 max)
5
5
4
4
4
4
4
4
5
4
5
5
5
4
5
5
4
5
5
4
4
5
5
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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