Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
28.3°C
1.8° 

Big Ben surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Big Ben surf forecast from 7 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 6PM (local time) - 7.5ft (2.3m), 9s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 7.5ft (2.3m), 9s period, SSW swell with 828 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 3AM (local time) - 7ft (2.2m), 9s period with S swell.

Best Forecast Surf Conditions for Big Ben this week:

The surf forecast for Big Ben over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 3AM. The primary swell is predicted to be 2.2m and 9s period with a secondary swell of 0.8m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Big Ben in the next 16 days are 2.3m 9s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 8th Sep)7ft (2.2m) 9s
Best Surf 6PM (Wed 9th Sep)7.5ft (2.3m) 9s
Most Powerful 6PM (Wed 9th Sep)7.5ft (2.3m) 9s

Table - best surf conditions forecast for Big Ben over the next 16 days.


The Lowdown

Alright, this is Rusty. Let’s have a look at what’s coming up for Big Ben over the next couple of weeks.

Right off the bat, the first few days are a bit of a struggle. We’ve got some swell rolling in from Tuesday the 8th through Thursday the 10th, but it’s pretty average. The waves are around 4 ft to 8 ft from the south-southwest, with periods hanging around 8 to 9 seconds, so it’s a bit short-period and not holding much shape. The wind is mostly cross-shore and getting fresh at times, so it’s going to be lumpy and chop-topped. The combined swell energy is moderate (up to 760), but the quality just isn’t there. I’d say give those days a miss unless you’re desperate for a paddle.

Then we hit a real quiet spell from Friday the 11th through to Saturday the 19th. The swell drops right off to barely 2 ft to 5 ft, mostly out of the east or northeast, with long 13 to 14-second periods. That sounds good on paper – long-period groundswell – but at a beach/jetty setup like Big Ben, those long-period swells tend to just roll through without much of a wall. The wind is light and occasionally cross-offshore, which would make it clean, but there’s just not enough juice. The combined energy drops to weak levels (around 189 to 449). It’s basically a flat spell, and you’re looking at over a week with no real surf to get excited about.

Now, here’s where it gets interesting. Starting Sunday the 20th, the whole picture flips. A new, much larger swell arrives from the southeast. By Sunday morning, we’ve got 3 ft but with a very long 18-second period, and the combined energy jumps to a strong 1229. The wind is light and cross-offshore, so it’ll be clean. By Sunday afternoon, it’s up to 5 ft, still 18 seconds, energy at 2123 – this is the standout, folks. This is a proper groundswell, and with the wind being clean, Big Ben could actually offer up some lined-up waves, particularly if you can find a bit of a bank. The swell direction from the southeast is bang on what this break likes.

Moving into Monday the 21st, it builds further. Morning sees 6 ft at 14 seconds, energy at 2565, and by afternoon it’s 8 ft from the south-southeast at 16 seconds, with energy climbing to 3148. The wind stays clean and cross-offshore. This is the peak quality window. It’s getting solid.

Tuesday the 22nd and Wednesday the 23rd, things get big – really big. The swell hits 10 ft to 13 ft from the south-southeast, with super long 16 to 18-second periods. Combined energy skyrockets into the thousands (4558 to 12236). This is expert territory. For most of us, it’s going to be too much, too powerful, and probably closing out or just dangerous at the jetty. The wind stays moderate cross-shore, but the sheer size makes this for big-wave chargers only.

So, if you’re looking for the best window, it’s Sunday the 20th into Monday the 21st. That’s the sweet spot where the swell is big enough to have proper waves but not so huge that it’s out of control, and the wind is clean. The later part of the week is for the heavy crew.

-Rusty

Short Range Forecast

Heavy rain (total 29mm), heaviest during Mon night. Warm (max 29°C on Tue morning, min 19°C on Thu afternoon). Winds increasing (calm on Mon night, fresh winds from the SW by Wed morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sun morning, min 18°C on Thu night). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
2
1
0
0
0
0
2
2
2
2
1
2
1
1
1
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
S
9
1.9
S
9
1.7
S
9
1.8
S
9
2.3
SSW
8
1.7
SSW
9
1.6
S
9
1.4
S
9
1.3
S
9
1.6
NE
7
0.6
E
14
0.6
E
14
0.7
E
14
0.7
E
14
0.9
E
13
1
E
13
0.9
E
13
0.9
E
13
0.9
E
12
Wave Graph
Metric surfscale
Energy kJ
1185
580
461
533
636
470
395
299
252
262
144
140
183
180
289
361
272
273
239
Wind (km/h)
10
WSW
10
SW
15
SSW
25
SSW
35
SW
30
SW
25
NE
20
N
25
N
20
N
10
NNE
10
NE
10
NNE
5
NE
10
E
10
NE
10
ENE
10
E
5
ESE
Wind State
cross-off
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross
cross-on
cross
cross
cross-on
glassy
High Tide
1:09AM1.28m
4:00PM1.44m
2:25AM1.38m
4:17PM1.48m
3:18AM1.48m
4:35PM1.51m
4:02AM1.57m
4:53PM1.53m
4:42AM1.62m
5:12PM1.55m
5:20AM1.63m
5:30PM1.56m
Low Tide
8:40AM0.37m
9:23PM1.01m
9:23AM0.31m
9:48PM0.87m
9:59AM0.30m
10:15PM0.72m
10:31AM0.32m
10:42PM0.59m
11:01AM0.38m
11:11PM0.48m
11:29AM0.47m
11:41PM0.39m
rain showers
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:16
5:18
5:18
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:57
5:55
5:54
5:52
5:52
5:50
 mm
10
1
5
1
1
9
2
Temp °C
25
29
29
27
29
29
22
21
19
19
21
22
21
24
25
23
27
27
25
Feels °C
30
33
32
30
29
30
22
20
17
18
22
24
23
28
29
26
30
30
30
  • 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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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 16 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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