Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 8 am Monday 20 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
17.5° C
(Which is slightly cooler than normal)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 1PM is: 2.3m 13s primary swell from a Southeast direction and 0.3m 10s secondary swell from a East-northeast direction (forecast issued at 08:00am April 20). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (20 Apr)8ft (2.5m)13s
Afternoon (20 Apr)7ft (2.2m)13s
Evening (20 Apr)6.5ft (2.0m)12s

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


Updates in  hr  min  s Forecast update imminent
Monday
20
Tuesday
21
Wednesday
22
Thu
23
6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM
Rating
(10 max)
4
3
1
1
2
2
1
0
0
0
2
2
1
1
1
1
1
0
0
0
1
1
1
2
Swell
Height Map
Wave Height (m) & direction (?)
2.5
SE
2.5
SE
2.3
SE
2.2
SE
2.1
SE
2
SE
2
SE
1.9
SE
1.7
ESE
1.6
ESE
1.7
ESE
1.6
ESE
1.5
ESE
1.3
ESE
1.2
ESE
1.9
E
1.5
ESE
1.6
ESE
1.6
ESE
1.4
SE
1.4
SE
1.4
ESE
1.3
ESE
1.1
ESE
Period(s) (?)1413131312121212111111111110101010101077777
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2357212618621583138111481111990711617645560480365310774492522480200217207169131
Wind
(km/h)
15
NE
15
E
15
ESE
20
SE
15
SSE
15
S
20
S
20
S
25
SSW
30
SW
15
WNW
10
ENE
25
E
25
ENE
25
E
15
ESE
15
SE
20
SSE
20
SSE
15
S
10
SW
5
SW
5
SW
0
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
on
onononcross-
on
cross-
on
cross-
on
cross-
on
cross-
off
crosscrosscrosscrosscross-
on
onononcross-
on
cross-
on
crosscross-
on
glass
High Tide
/ height (m)
5:20AM
1.45
7:23PM
1.30
5:51AM
1.43
8:23PM
1.21
6:25AM
1.38
9:31PM
1.12
Low Tide
/ height (m)
12:20PM
-0.20
12:24AM
0.80
1:06PM
-0.14
12:58AM
0.88
1:58PM
-0.03
1:35AM
0.94
Monday
20
Tuesday
21
Wednesday
22
Thu
23
Sunrise5:01-------5:00-------4:58-------
Sunset----6:15-------6:15-------6:15---
cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
light rain
Rain (mm)
-----------------------1
Temp. °C161819181717171717191921161615161618191918181717
Feels °C (?)15161615151515141415171912109121314151718181718
  • 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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