Big Ben surfForecast / Chiba / Japan

information circle12 Day Weather and Surf, issued 2 pm Tuesday 15 Jul 2025 JST
Forecast update in hr  min  s Forecast update imminent
Big Ben surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Ben sea temperature is
26.8° C
(Which is 1.5°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Big Ben this week:

The surf forecast for Big Ben over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 17) at 6PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.4m and 13s. Another secondary swell of 1.3m and 8s is also forecast. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Big Ben in the next 12 days are 5.0m 11s and forecast to arrive on Wednesday (Jul 16) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 17th Jul)4.5ft (1.4m) 9s
Best Surf 6AM (Tue 22nd Jul)4ft (1.2m) 9s
Most Powerful12AM (Wed 16th Jul)16ft (5.0m) 11s

Table - best surf conditions forecast for Big Ben over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Tue
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sun
27
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
4.5
SSE
5
SSE
3.5
SSE
3.5
SSE
2.2
SSE
1.7
S
1.3
ESE
1.3
ESE
1.3
ESE
1.3
ESE
1.4
SE
1.3
ESE
1.3
SE
1.2
SE
1.1
ESE
1.1
ESE
1
ESE
1.1
ESE
1
ESE
1.1
ESE
1.2
ESE
1.2
ESE
1.2
SE
2.2
SSW
2.5
SSW
2.3
SSW
2.1
SSW
2
SSW
1.8
SSW
1.7
SSW
1.6
SSW
1.3
SSW
1
SSW
0.9
SSW
0.7
SW
1.6
NE
Period(s) (?)111110998101010101010999999998891616141313121211111111116
Wave
Graph
(?)Metric surfscale
Energy (?)4638562923172142756751618498412384370357321324234259269276237249223217348248032712353169914961100842764517402310273498
Wind
(km/h)
35
S
30
SSW
30
S
35
SSW
20
SSW
20
SSW
20
SSW
15
SSW
20
S
20
S
10
S
10
SSE
15
SSE
10
S
15
S
15
S
10
SSW
10
S
15
SSE
10
S
10
SSE
15
SSE
10
SSW
10
SSW
15
SSW
15
SSW
10
SSW
15
S
10
S
10
SSE
15
SSE
10
SE
20
E
25
ENE
30
ENE
40
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
cross-
on
cross-
on
ononcross-
on
cross-
on
cross-
on
cross-
on
High Tide
/ height (m)
8:15PM
1.41
7:43AM
1.29
8:43PM
1.39
8:44AM
1.19
9:12PM
1.37
10:09AM
1.09
9:46PM
1.36
12:24PM
1.06
10:28PM
1.35
2:58PM
1.15
11:25PM
1.35
4:02PM
1.26
12:35AM
1.36
4:37PM
1.36
1:43AM
1.39
5:07PM
1.43
2:41AM
1.44
5:34PM
1.47
3:33AM
1.49
5:59PM
1.49
4:19AM
1.53
6:23PM
1.50
5:03AM
1.54
Low Tide
/ height (m)
2:07AM
0.74
2:05PM
0.50
2:59AM
0.69
2:39PM
0.66
4:02AM
0.63
3:14PM
0.83
5:17AM
0.56
3:59PM
0.99
6:37AM
0.46
5:36PM
1.12
7:47AM
0.35
7:46PM
1.18
8:43AM
0.23
9:04PM
1.16
9:30AM
0.13
9:53PM
1.12
10:11AM
0.07
10:32PM
1.05
10:49AM
0.04
11:06PM
0.98
11:25AM
0.05
11:40PM
0.89
11:59AM
0.11
Tue
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sun
27
Sunrise--4:35--4:37--4:37--4:37--4:39--4:39--4:39--4:41--4:41--4:41--4:43--4:43
Sunset6:53--6:53--6:52--6:52--6:52--6:52--6:51--6:50--6:50--6:49--6:47--6:47--
thunderstorm mod rainmod rainheavy rainlight rainpart cloudthunderstorm thunderstorm thunderstorm clearpart cloudpart cloudpart cloudclearclearclearclearpart cloudclearclearclearclearclearclearclearclearclearclearclearclearclearclearthunderstorm thunderstorm thunderstorm mod rain
Rain (mm)
2998114-111-----------------------12710
Temp. °C272626252628282628272528282628282628282528282629292629292628282628272626
Feels °C (?)262526242829292930282730302931302930312931313032312931312931302928272524

Short Range Forecast: Heavy rain (total 64mm), heaviest during Tue afternoon. Warm (max 28°C on Thu morning, min 24°C on Wed afternoon). Winds decreasing (fresh winds from the S on Tue afternoon, light winds from the SSW by Thu night).

Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 29°C on Wed morning, min 25°C on Mon night). Wind will be generally light.

Long Range Forecast: Heavy rain (total 23mm), heaviest during Sun morning. Warm (max 29°C on Thu afternoon, min 25°C on Thu night). Winds increasing (light winds from the S on Thu night, strong winds from the E by Sun afternoon).

  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Chiba

  1. weather stationWind Update No recent live wind reports 17 km from Big Ben. 3.7m 10 s period wind swell from SSE is too big

    Big Ben
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big Ben 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.


Information about the Big Ben Surf forecast

The above surf forecast table for Big Ben provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Big Ben can be found by selecting the local surf guide option on the grey menu. Our Big Ben surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Big Ben) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Big Ben may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Big Ben is 3 km (2 miles) from Kawaguchi. If you plan a holiday in Chiba, look for hotels and other accommodation in Kawaguchi. Kawaguchi has rooms for a wide range of budgets as well as car hire and transport links.

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