Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Amatu surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Wednesday 18 Feb 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
15.6° C
 (Which is slightly cooler than normal)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 6AM is: 0.7m 11s primary swell from a East direction and 1.0m 7s secondary swell from a East direction (forecast issued at 02:00am February 18). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.

Time (JST) & DateWave HeightWave Period
Morning (18 Feb)4.5ft (1.3m)9s
Afternoon (18 Feb)4.5ft (1.3m)9s
Evening (18 Feb)5.5ft (1.7m)8s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Wednesday
18
Thursday
19
Friday
20
0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM
Rating
(10 max)
0
1
2
2
1
2
2
3
1
1
0
2
1
0
0
0
1
1
1
1
1
1
0
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.6
E
0.6
E
0.7
E
1.3
E
1.4
E
1.3
E
1.2
E
1.7
SW
1.3
SW
0.9
SW
0.6
E
0.6
E
0.5
E
0.6
E
0.6
E
0.6
E
0.6
E
0.6
E
0.4
ENE
0.6
E
0.6
ENE
0.6
ENE
0.6
ENE
0.6
ENE
Period(s) (?)12111199998881212121212121212151514141313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)9592114264306270230362201881001027210310310610310379155158145141141
Wind
(km/h)
15
N
15
N
15
NNW
15
NNW
10
SW
15
W
10
W
15
WNW
35
N
30
N
25
N
20
N
5
NW
10
SW
10
SW
10
SW
0
S
10
NE
10
NNE
15
NNE
10
N
5
NNW
5
WSW
5
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offoffoffcrosscross-
off		cross-
off		cross-
off		offoffoffoffoffcrosscrosscross-
on		glasscross-
off		cross-
off		cross-
off		cross-
off		glasscrossglass
High Tide
/ height (m)
5:45AM
1.34
5:01PM
1.44
6:06AM
1.37
5:41PM
1.44
6:28AM
1.37
6:23PM
1.39
Low Tide
/ height (m)
11:09PM
-0.03
11:18AM
0.51
11:39PM
0.01
11:49AM
0.41
12:09AM
0.10
12:22PM
0.32
Wednesday
18
Thursday
19
Friday
20
Sunrise---6:22-------6:22-------6:20----
Sunset-----5:22-------5:23-------5:24--
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
cloud
Rain (mm)
------------------------
Temp. °C77671011986334787776668998
Feels °C (?)33236653-3-6-5-3343352114765
  • 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

Latest Updates

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal
travel
Surf Forecast

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal

Surf road trips just got even better. Surf-Forecast users can now save up to 20% on SIXT rental cars worldwide during the promotional period until March 31, 2026. Whether you’re planning a legendary California road trip, chasing waves along Europe’s coasts, or exploring remote surf destinations, this exclusive SIXT offer helps you travel smarter and cheaper. And if you want some inspiration on where to go, check out our article Five Iconic Surf Road Trips. Click and get your SIXT discount

The World’s Most Inconsistent Waves
Ben Mondy

The World’s Most Inconsistent Waves

Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean

Read more

Read more

Discover more articles and updates in the Greenroom.

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.

View detailed surf forecast for Amatu at:
surf-forecast.com

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest