Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Tuesday 21 Apr 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
18.6° C
(Which is normal for this time of year)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 6AM is: 2.0m 11s primary swell from a Southeast direction and 0.1m 13s secondary swell from a Northeast direction, 1.2m 5s secondary swell from a South direction (forecast issued at 02:00am April 21). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (21 Apr)5ft (1.6m)11s
Afternoon (21 Apr)4.5ft (1.4m)11s
Evening (21 Apr)4ft (1.2m)10s

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


Updates in  hr  min  s Forecast update imminent
Tuesday
21
Wednesday
22
Thursday
23
0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM
Rating
(10 max)
1
0
0
0
3
0
1
0
0
1
1
0
0
0
0
0
1
1
2
0
0
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
2
SE
2.1
SE
2
SE
1.6
ESE
1.6
ESE
1.4
ESE
1.7
ESE
1.2
ESE
1.2
ESE
1.8
E
1.5
ESE
1.5
ESE
1.3
ESE
1.2
ESE
1.3
ESE
1.3
ESE
1.2
ESE
1
ESE
1
ESE
0.9
ESE
0.9
ESE
0.7
ESE
0.8
ESE
0.7
ESE
Period(s) (?)12121111111111101010101010101010101010101010109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)111111419696175714696193163107064694243312863023022612001961451299411590
Wind
(km/h)
20
S
25
SSW
25
SSW
30
SW
15
WNW
30
ENE
25
E
25
ENE
20
E
15
E
10
SE
15
S
20
S
20
S
15
S
15
SSW
15
SW
10
SW
5
NW
5
SW
15
WSW
15
SSW
5
E
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
cross-
on
cross-
on
cross-
off
crosscrosscrosscross-
on
cross-
on
ononcross-
on
cross-
on
cross-
on
cross-
on
crosscrossglasscross-
on
crosscross-
on
cross-
on
cross-
off
High Tide
/ height (m)
5:51AM
1.43
8:23PM
1.21
6:25AM
1.38
9:31PM
1.12
7:03AM
1.30
Low Tide
/ height (m)
12:24AM
0.80
1:06PM
-0.14
12:58AM
0.88
1:58PM
-0.03
1:35AM
0.94
2:59PM
0.11
Tuesday
21
Wednesday
22
Thursday
23
Sunrise--5:00-------4:58-------4:58-----
Sunset------6:15-------6:15-------6:16-
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
clear
clear
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
Rain (mm)
---------------------137
Temp. °C171718202017161615151618181817171716161817131213
Feels °C (?)151415161912111010111314141415161615161814111111
  • 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

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Amatu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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