Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.9°C
0.7° 

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 11 Sep 2026:

  • Best quality surf: Saturday 19 Sep, 9AM (local time) - 10ft (3.0m), 15s period, SE swell with cross-offshore winds.
  • Most powerful swell: Saturday 19 Sep, 9AM (local time) - 10ft (3.0m), 15s period, SE swell with 3,797 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 9AM (local time) - 2.5ft (0.7m), 14s period with E 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 Saturday (Sep 12) at 9AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.6m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big Ben in the next 16 days are 3.0m 15s and forecast to arrive on Saturday (Sep 19) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Sep 15) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 12th Sep)2.5ft (0.7m) 14s
Best Surf 9AM (Sat 19th Sep)10ft (3.0m) 15s
Most Powerful 9AM (Sat 19th Sep)10ft (3.0m) 15s

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


The Lowdown

Alright, Rusty here. Let's have a look at what Big Ben has in store for us.

It’s a bit of a slow start, but there’s a nice clean window kicking things off. The water is sitting at 80°, which is pretty much spot on for this time of year, so no surprises there.

Right out of the gate, Saturday the 12th is looking solid. We’ve got a small but clean 2ft east swell rolling in with a 14-second period, meaning it’s got some good energy behind it (combined swell energy of 269). The wind is a light cross-off, so the face will be tidy. It’s not huge, but perfect for a beginner session.

Sunday morning the 13th is the real standout early on. The swell holds at 3ft from the east, period still a solid 13 seconds, and the wind goes glassy. That is as good as it gets for clean, fun waves at Big Ben. Make the most of it.

The middle of the week gets a bit messy with onshore winds and chop, but Tuesday morning the 15th is worth noting. Another glassy morning, swell bumps up just a touch to 3ft from the east, and the energy is building (492). It’s a solid window before the wind swings around.

Now, looking ahead to the weekend of the 19th, we’ve got a massive spike in the swell. Saturday morning shows a 10ft southeast swell with a very long 15-second period and crazy energy (4419). The wind is a clean cross-off, so it will look beautiful, but that’s too much wave for this break. It’s really only one for the experts, and even then, the size is pushing it. Later that afternoon, it gets a bit choppy.

The real gold in the second week lands on Sunday the 20th afternoon and Monday the 21st morning. On Sunday afternoon, we’ve got 5ft swell from the south, 12-second period, and glassy conditions. The energy is still hefty (1435), and the forecast says excellent conditions for experienced surfers. That’s the pick of the trip. Monday morning follows with a similar 6ft south swell, still glassy, and again, excellent conditions. Crowds are listed as 'sometimes' at Big Ben, so on these standout days, you can expect some company, but it’ll be worth it.

After that, the wind gets messy again, and the swell drops off pretty quickly heading into the end of the month. The last few days of the forecast are all pretty ordinary, with small, weak, and choppy surf.

So to sum it up: hit Sunday the 13th morning for the small, clean stuff, and mark your calendar for Sunday the 20th afternoon and Monday the 21st morning for the best waves of the outlook. It gets a bit lumpy and big in between, so pick your windows.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Mon night. Warm (max 28°C on Mon morning, min 21°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Wed morning. Warm (max 27°C on Tue morning, min 21°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the NNE by Thu night).

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
2
1
1
0
0
2
2
1
2
1
1
2
1
0
1
1
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
E
14
0.9
E
13
0.9
ESE
13
0.9
E
13
0.9
E
13
0.8
E
12
0.9
E
12
0.9
E
12
1
E
14
1
E
14
1.1
E
14
1
E
13
1
E
13
0.9
E
13
0.8
E
12
0.7
E
12
1.7
ENE
7
2.4
ENE
8
2.3
ENE
8
2.1
ENE
8
1.3
SE
17
Wave Graph
Metric surfscale
Energy kJ
180
289
295
272
276
190
233
244
384
383
496
345
340
255
184
155
266
741
687
593
886
Wind (km/h)
10
NNE
15
NNE
10
NNE
5
NE
10
S
10
S
15
SSW
20
SSW
15
SW
5
SSW
15
SSW
0
NW
15
NE
15
NE
15
NNE
20
NNE
25
NE
25
NNE
30
NNE
30
NNE
20
NNE
Wind State
cross-off
cross-off
cross-off
glassy
cross-on
cross-on
cross
cross-on
cross
glassy
cross-on
glassy
cross
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
High Tide
5:12PM1.55m
5:20AM1.63m
5:30PM1.56m
5:58AM1.59m
5:50PM1.57m
6:37AM1.52m
6:10PM1.56m
7:20AM1.42m
6:29PM1.55m
8:11AM1.30m
6:50PM1.51m
9:25AM1.19m
7:10PM1.46m
Low Tide
11:01AM0.38m
11:11PM0.48m
11:29AM0.47m
11:41PM0.39m
11:55AM0.58m
00:13AM0.33m
12:20PM0.71m
00:48AM0.32m
12:42PM0.84m
1:26AM0.34m
1:01PM0.96m
2:13AM0.40m
1:11PM1.08m
light rain
cloud
part cloud
part cloud
clear
clear
clear
part cloud
light rain
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
rain showers
cloud
cloud
part cloud
light rain
cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:20
5:20
5:20
5:22
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:50
5:49
5:47
5:45
5:45
5:43
 mm
2
3
1
2
1
3
4
Temp °C
21
22
22
25
26
25
28
27
26
27
27
25
25
24
22
23
23
22
21
22
23
Feels °C
23
24
25
29
30
29
29
28
29
29
29
29
28
26
24
22
21
20
18
21
24
  • 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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