Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
28.0°C
1.2° 

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 29 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 3AM (local time) - 2.5ft (0.8m), 12s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 1 Sep, 12PM (local time) - 3.5ft (1.0m), 12s period, E swell with 289 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 12AM (local time) - 2ft (0.6m), 11s 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 Sunday (Aug 30) at 12AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.7m and 5s. 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 1.0m 12s and forecast to arrive on Tuesday (Sep 01) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 4s period and expected on Friday (Sep 04) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 30th Aug)2ft (0.6m) 11s
Best Surf 3AM (Tue 1st Sep)2.5ft (0.8m) 12s
Most Powerful12PM (Tue 1st Sep)3.5ft (1.0m) 12s

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


The Lowdown

Alright folks, Rusty here, checking in on the local surf scene. We've got one spot to look at, and it's a bit of a mixed bag, so let's get into it.

First up, the water temp at Big Ben is sitting at 82°, which is a touch warmer than normal for this time of year, so you might get away with boardshorts or a spring suit.

The forecast period kicks off with a bit of a slow start. The first few days, from Saturday the 29th to Tuesday the 1st of September, are pretty lackluster. We're seeing small swell from the east, around 1 ft to 3 ft, with a mix of glassy conditions and light cross-shore breezes. It's surfable, but very ordinary, and the combined swell energy is weak, sitting around 128 to 359, so you're not going to get much push. It's a bit of a quiet start, honestly.

We then hit a bit of a gap from Wednesday the 2nd through to Friday the 4th. The swell stays small and weak, with energy reading between 199 and 264, and the wind is all over the place, from light onshore to moderate cross-shore. The conditions are poor, and the wave quality just isn't there. It's a waiting game.

Now, the first real standout of the outlook arrives on Sunday the 6th of September, in the afternoon. The swell picks up to 4 ft from the SSE, with a very long period of 15 seconds. That's a proper groundswell, and the combined energy jumps to a strong 1083. The wind is a cross-shore from the ENE at 12 mph, so it's a bit lumpy. However, this is a beach/jetty break, and that long period swell can make it break a bit straight, so keep that in mind. It's a solid window, but not perfect.

The next big event rolls in from Monday the 7th, and it's a classic case of "too much of a good thing." By Tuesday the 8th and Wednesday the 9th, we're looking at a massive 12 ft swell from the ESE, with a period of 12 to 13 seconds. The combined energy is monstrous, hitting 3545 to 4250. The wind is onshore or cross-onshore, but the real issue is that this is way too big for Big Ben. It's a real shame because the power is there, but it's going to be a washing machine. This is expert-only territory, and even then, it's going to be a challenge. The forecast is saying it's too big for this break.

This lingers into Thursday the 10th and Friday the 11th, with swell dropping to 13 ft and 10 ft, but the wind gets really strong, with gusts up to 28 mph. The energy is still through the roof, over 11,000 on Thursday morning, but the conditions are just blown out. It's a no-go for surfing, but that kind of wind and swell combo might be more interesting for the kite surfers, as the beach setup is all over the place.

By the start of the second week, things calm down a bit. Saturday the 12th still has a solid 8 ft swell from the ENE, but the wind is howling at 28 mph, making it a mess. Into Sunday the 13th, the swell drops to 5 ft, but the wind is still a strong 22 mph. It's a poor end to the outlook.

So, to wrap it up, the only real window to consider is that Sunday afternoon, September 6th, with the long-period groundswell. It's not perfect, but it's the best on offer. The rest of the period is either too small, too windy, or too big. Keep an eye on the forecast, though, because it's a dynamic spot.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Mon morning. Warm (max 28°C on Tue morning, min 21°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Thu night. Warm (max 29°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light.

Sat
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
1
1
0
1
1
1
0
1
1
1
0
0
1
2
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
E
11
0.6
E
11
0.5
E
11
0.5
E
12
0.5
E
11
0.4
ESE
14
0.6
ESE
14
0.8
ESE
12
1
E
12
1
E
11
1
E
11
0.8
E
10
0.8
E
10
1.1
SE
6
0.8
E
11
1.2
SSE
6
0.7
E
10
0.6
E
10
0.6
E
10
1.3
E
6
Wave Graph
Metric surfscale
Energy kJ
91
89
66
67
61
68
145
208
284
260
231
130
125
96
146
103
96
66
73
123
Wind (km/h)
5
ESE
15
NNW
10
N
5
ENE
10
NNE
10
ENE
15
ENE
10
NE
10
NE
10
ESE
10
ENE
10
ENE
10
SSE
10
SSW
20
SSW
15
SW
5
NNW
10
NNE
15
NE
25
NE
Wind State
glassy
cross-off
cross-off
glassy
cross-off
cross
cross
cross
cross
cross-on
cross
cross
on
cross-on
cross
cross
cross-off
cross-off
cross
cross
High Tide
5:47PM1.54m
5:42AM1.60m
6:06PM1.55m
6:21AM1.55m
6:26PM1.55m
7:02AM1.47m
6:45PM1.54m
7:47AM1.35m
7:06PM1.51m
8:45AM1.23m
7:27PM1.48m
10:29AM1.12m
7:48PM1.43m
Low Tide
11:40PM0.54m
11:57AM0.41m
00:11AM0.46m
12:23PM0.54m
00:45AM0.42m
12:48PM0.68m
1:22AM0.41m
1:09PM0.82m
2:05AM0.43m
1:26PM0.96m
3:00AM0.47m
1:21PM1.08m
light rain
light rain
part cloud
part cloud
cloud
light rain
rain showers
part cloud
clear
clear
clear
clear
part cloud
thunderstorm
cloud
cloud
thunderstorm
light rain
cloud
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:09
5:11
5:11
5:11
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:09
6:08
6:07
6:06
6:04
6:02
 mm
1
1
5
1
2
5
1
15
Temp °C
25
21
24
25
24
24
25
24
28
28
26
28
29
27
26
26
26
24
24
23
Feels °C
30
21
27
29
27
27
28
26
32
32
30
32
33
32
28
30
29
27
26
24
  • 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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