Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
28.2°C
1.5° 

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 30 Aug 2026:

  • Best quality surf: Monday 31 Aug, 9PM (local time) - 2.5ft (0.7m), 13s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Sunday 6 Sep, 3AM (local time) - 8ft (2.5m), 8s period, ENE swell with 952 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 12AM (local time) - 1.5ft (0.5m), 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 Monday (Aug 31) at 12AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m 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 2.5m 8s and forecast to arrive on Sunday (Sep 06) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Sep 01) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 31st Aug)1.5ft (0.5m) 11s
Best Surf 9PM (Mon 31st Aug)2.5ft (0.7m) 13s
Most Powerful 3AM (Sun 6th Sep)8ft (2.5m) 8s

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


The Lowdown

Rusty here, checking in on the waves at Big Ben for the next couple of weeks. Alright, it’s a bit of a slow cooker, but there are a few windows worth paddling out for. The water’s a touch warmer than normal for this time of year, sitting at 83°, so it’s pretty pleasant out there.

We’ve got a real gap of several days with no decent surf to start. The good stuff doesn't really kick off until the very end of the period. Right now, on Sunday the 30th of August, it’s glassy with a tiny 2ft easterly swell, but the overall energy is weak, reading just 94. It’s surfable, but you’ll be scratching for something to do.

Monday the 31st stays small and messy, with a cross-off wind in the morning but the swell is only 1ft. By Tuesday the 1st of September, we see some improvement. Tuesday morning is looking okay with clean conditions, a 3ft ESE swell, and solid wave energy (327). It’s not a standout, but it’s the best we’ve seen so far. Wednesday the 2nd has a glassy morning with similar 3ft surf from the east, giving us clean little rolls.

The second week is a mixed bag. A lot of choppy, wind-affected days from Thursday the 3rd through to the 8th of September, with waves bumping up to 8ft but cross-onshore winds chopping it up. Energy builds into the moderate range, peaking at 1920 on the 7th, but the quality just isn’t there for a good paddle. The wind is making it look more interesting for kites than surfboards.

Now, here’s the real standout. On Wednesday the 9th of September, a serious swell arrives. We’re looking at a 13ft south-southeast groundswell with a very long period of 12 seconds. Combined energy is an immense 5058. It’s big, too big for most. The wind is cross-shore, but the conditions are favorable for the experts. This is a big-wave mission only. Thursday the 10th holds similar heavy energy, with a 16ft southeast swell and a fresh cross-off wind, but again, this is strictly for the experienced crew.

After that, it drops back down. Friday the 11th sees clean 6ft surf from the southeast, with moderate energy. By Sunday the 13th of September, things settle into a cleaner, smaller window with a 3ft south-southwest swell and light offshore winds, giving us some nice, clean, manageable waves. That’s your best bet for a relaxed session before the run fades into small, wind-affected dribble on the 14th.

So to sum it up: the first week is a write-off for anything decent. The second week has a massive spike that’s only for the brave, and the very end of the forecast offers a clean, smaller window. That Sunday the 13th morning is the pick of the crop for the average surfer.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Tue morning, min 23°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 27mm), heaviest during Sat morning. Warm (max 30°C on Thu morning, min 20°C on Sat morning). Winds increasing (calm on Thu night, fresh winds from the NE by Sat morning).

Sun
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
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
0
2
2
1
2
2
0
1
1
0
1
1
0
0
0
0
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
E
12
0.5
E
11
0.4
ESE
14
0.6
ESE
14
0.8
ESE
12
0.9
ESE
12
1.1
E
11
1
E
11
0.9
E
10
0.8
E
10
0.8
E
11
0.7
E
10
0.7
E
10
1.1
SSE
6
1
ENE
9
1.4
ENE
6
1.5
ENE
6
1.8
E
7
2.3
ENE
7
2.5
ENE
8
Wave Graph
Metric surfscale
Energy kJ
67
61
68
145
208
232
295
240
167
125
144
98
96
100
161
135
165
297
514
708
Wind (km/h)
5
E
5
NNE
15
NNE
15
NE
15
NNE
15
NNE
5
E
5
NE
5
S
15
S
15
SSW
15
SSW
20
SSW
10
SW
20
NNE
25
NE
20
NE
25
NE
25
NE
20
NNE
Wind State
glassy
cross-off
cross-off
cross
cross-off
cross-off
cross-on
glassy
glassy
cross-on
cross
cross
cross-on
cross
cross-off
cross
cross
cross
cross
cross-off
High Tide
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
8:08PM1.35m
Low Tide
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
4:21AM0.52m
part cloud
part cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
part cloud
clear
part cloud
thunderstorm
cloud
cloud
mod rain
heavy rain
mod rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:11
5:11
5:11
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:08
6:07
6:06
6:04
6:02
6:01
 mm
4
7
16
6
3
Temp °C
25
24
26
26
24
28
27
25
28
28
27
30
29
27
23
24
23
21
20
20
Feels °C
29
28
29
28
26
31
31
30
31
30
31
31
30
30
24
24
23
20
18
19
  • 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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