Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.4°C
0.1° 

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 3 Sep 2026:

  • Best quality surf: Monday 7 Sep, 12AM (local time) - 10ft (3.0m), 9s period, E swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 6AM (local time) - 11ft (3.5m), 9s period, ENE swell with 2,060 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 6AM (local time) - 2ft (0.6m), 10s period with SSW 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 Friday (Sep 04) at 6AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.7m and 6s. 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 3.5m 9s and forecast to arrive on Monday (Sep 07) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Thursday (Sep 10) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Fri 4th Sep)2ft (0.6m) 10s
Best Surf12AM (Mon 7th Sep)10ft (3.0m) 9s
Most Powerful 6AM (Mon 7th Sep)11ft (3.5m) 9s

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


The Lowdown

Right then, let’s have a look at what’s on the table for Big Ben.

We’ve got a bit of a slow start, but things are gonna build through the first weekend and into the following week. To be honest, the early part of the outlook is pretty messy. Friday the 4th through Saturday the 5th are a write-off for a decent paddle. We’re looking at cross-shore winds and pretty average conditions, with small, weak, short-period swell in the 2ft range on Friday, building to a more powerful but still poor 6ft on Saturday thanks to a 7 second period and moderate breeze. The combined swell energy on Saturday afternoon hits 392 (moderate), but the wind is just making a mess of it.

Sunday the 6th is where it starts to get interesting. In the morning, the swell pushes up to 8ft from the ENE with a 7 second period, and we get a cross-offshore breeze from the NNE. The combined energy jumps to 576 (moderate to strong). It’s a marginal call but clean. That’s the first real window. Sunday afternoon though, the wind swings and gets fresh, lumping it right up.

Now, the standout window in this run is Monday the 7th, specifically the afternoon. We get a solid 7ft of ENE groundswell – that's a 10-second period – with a proper offshore breeze from the NNW at 30 km/h. The combined swell energy is a hefty 1016 (strong), and with that offshore wind, it’s going to be clean and lined-up. This is expert territory given the size and power, and it’s a beach/jetty setup, so the longer period will be making it wall up. Keep in mind, Big Ben can be inconsistent, and the crowds are sometimes an issue, especially when it looks this good.

The following week has a few more moments. Wednesday the 9th sees the swell get big and rowdy, topping out at 10ft from the S with a 10-second period and a combined energy of 3172 (very strong), but the winds are messy cross-shore. Too big and lumpy for most.

Thursday the 10th afternoon offers another good chance. The swell drops to a more manageable 6ft from the S, with a 9-second period, and the wind goes glassy offshore from the NW, barely a breath. The combined energy is 820 (moderate to strong). It’s clean and will be fun for the more experienced crew.

After that, we fade out into the second week. There’s a long gap of poor to marginal conditions from the 11th through to the 16th, with small, often onshore swell and weak energy. Look towards Thursday the 17th in the morning for another potential clean-up. We get a light offshore breeze and a small but clean 4ft E swell with an 8-second period. It’s a low-energy 259, but if you’re after a quiet, small-wave session, it might be your pick.

Overall, the best bet on this run is the Monday 7th afternoon session—solid groundswell, offshore wind, and plenty of power—but keep your wits about you, it’s big. For a slightly more relaxed but still quality wave, the Thursday 10th afternoon glass-off is the one to circle.

Rusty.

Short Range Forecast

Heavy rain (total 37mm), heaviest during Fri night. Warm (max 26°C on Fri morning, min 21°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NE by Sun afternoon).

Days 5-7 Weather Summary

Heavy rain (total 85mm), heaviest during Mon morning. Warm (max 29°C on Wed morning, min 22°C on Sun night). Winds decreasing (strong winds from the NNE on Sun night, calm by Mon night).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
1
1
0
!
0
3
3
3
1
2
1
!
1
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
10
0.7
E
9
0.7
SSW
10
0.6
SSW
9
1.4
E
6
1.8
E
7
1.6
ENE
7
2.3
ENE
7
3
ENE
8
3
E
9
3
ENE
10
2
ENE
10
2.5
SSE
10
2.5
SSE
10
2.3
SSE
10
1.8
SSE
9
2.5
S
10
3
S
10
2.5
S
10
Wave Graph
Metric surfscale
Energy kJ
92
83
100
65
143
297
239
542
1001
1583
1670
703
1357
1331
1040
537
1353
1853
1218
Wind (km/h)
5
SE
10
ENE
15
ENE
15
NE
25
NE
20
NE
25
NNE
30
NNE
35
NE
35
NE
45
NNW
30
NNW
10
SSW
15
SW
15
SSW
15
SW
25
SSW
30
SSW
25
SW
Wind State
glassy
cross
cross
cross
cross
cross
cross-off
cross-off
cross
cross-off
cross-off
off
cross-on
cross
cross-on
cross
cross
cross
cross
High Tide
10:29AM1.12m
7:48PM1.43m
8:08PM1.35m
3:59PM1.32m
10:09PM1.26m
3:49PM1.38m
1:09AM1.28m
4:00PM1.44m
2:25AM1.38m
4:17PM1.48m
Low Tide
3:00AM0.47m
1:21PM1.08m
4:21AM0.52m
6:15AM0.51m
8:43PM1.26m
7:44AM0.44m
8:59PM1.14m
8:40AM0.37m
9:23PM1.01m
9:23AM0.31m
9:48PM0.87m
rain showers
cloud
thunderstorm
heavy rain
mod rain
light rain
part cloud
cloud
light rain
heavy rain
heavy rain
clear
part cloud
part cloud
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:13
5:13
5:15
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:04
6:02
6:01
6:00
5:59
5:57
5:55
 mm
1
2
23
9
1
1
33
20
1
25
2
4
12
Temp °C
24
26
26
23
22
21
22
24
23
24
24
24
25
28
27
26
29
29
27
Feels °C
28
28
28
25
21
20
21
21
19
20
20
23
26
29
29
28
30
30
28
  • Map Icons:
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  • 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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