Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.1° C
0.4° 

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 8 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 9AM (local time) - 6.5ft (2.0m), 13s period, E swell with glassy winds.
  • Most powerful swell: Sunday 16 Aug, 9AM (local time) - 8ft (2.5m), 11s period, E swell with 1,704 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 9AM (local time) - 6.5ft (2.0m), 13s 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 09) at 9AM. The primary swell is predicted to be 2.0m and 13s period with a secondary swell of 1.0m and 10s. 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 2.5m 11s and forecast to arrive on Sunday (Aug 16) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Thursday (Aug 13) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sun 9th Aug)6.5ft (2.0m) 13s
Best Surf 9AM (Sun 9th Aug)6.5ft (2.0m) 13s
Most Powerful 9AM (Sun 16th Aug)8ft (2.5m) 11s

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’s cooking for Big Ben.

We’ve got a bit of a slow burner this time around. The surf window kicks off on Sunday morning, August 9th, and the standout session is right there at the start. Sunday morning is looking like the pick of the whole run – don’t sleep on it.

Sunday, August 9th – Morning: This is your window. We’ve got a solid 7ft easterly swell rolling in with a long 13-second period, pumping in some real energy (1631). The wind is glassy, dead calm from the ENE at only 3 mph. That’s about as clean as it gets. The water is sitting at 81°, pretty normal for this time of year. This is excellent, but at 7ft with that power, it’s more for experienced surfers. The break is inconsistent by nature, so be patient between sets, but when they come, they’ll be worth the wait. Big Ben (beach/jetty) is exposed to the SE, and this east swell is right in the wheelhouse. Crowds are possible here, so you might have some company.

Sunday afternoon the wind shifts cross-on, and the quality drops off. The rest of the first week is a bit of a mixed bag.

Monday, August 10th sees the wind pick up strong and cross-shore, making things messy. Not your day.

Tuesday, August 11th – Morning: Another clean session sneaks in. A 7ft easterly swell with a 10-second period, and a light cross-offshore wind from the north at 3 mph. This is good, clean surf for the experienced crew. It won’t have the same grunt as Sunday, but it’ll be fun.

Wednesday and Thursday are mostly a write-off with onshore winds and smaller, weaker energy.

Friday, August 14th – Morning: A bit of a return to form. 6ft east swell, clean with a cross-offshore breeze. It’s only a marginal call on the score, but the conditions will be clean. Worth a look if you missed the weekend.

Saturday, August 15th – Morning: Another clean morning with 6ft east swell. The wind is light and cross-off. It’s consistent in its inconsistency, but these clean windows are your best bet.

Sunday, August 16th – Morning: The swell jumps back up to 8ft from the east with an 11-second period, and the energy is cranking (3249). But the wind is cross-shore, so it’ll be lumpy. This one’s for the experts only at that size, but the wind might spoil it.

Monday, August 17th – Morning: Swell hits 10ft. That’s too big for this break, even with favorable wind and tide. This is strictly for the chargers, and even then, it’s pushing the limits. The afternoon drops to 8ft but the wind is messy.

After that, we hit a dry spell. From Tuesday, August 18th through to Friday, August 21st, the surf is poor. The wind is strong and the swell is small and weak. The combined energy drops well below 500 most days. It’s a real gap in quality.

Saturday, August 22nd – Morning: A tiny pulse of 2ft appears, but with a very long 14-second period. The wind is clean and cross-off. This is a long-period groundswell, so it’ll be small but lined up. Better for a longboard or a bigger board, and it’ll be clean.

Sunday, August 23rd offers a bit more size (3ft) but the wind is onshore and the period is long again (12 seconds). It’s marginal.

Monday, August 24th is a complete blowout with strong SW winds. Forget it.

So, to wrap it up: Sunday morning, August 9th is the absolute standout. Get on it. Tuesday morning, August 11th and Friday morning, August 14th are your back-up clean windows. The second week is mostly a write-off, with only a tiny, clean window on the 22nd for the patient longboarder.

Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Tue night. Warm (max 29°C on Sun morning, min 22°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 55mm), heaviest during Fri night. Warm (max 29°C on Fri afternoon, min 24°C on Wed night). Wind will be generally light.

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
2
1
3
4
2
1
0
0
1
3
0
3
2
2
2
3
1
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
E
13
1.9
E
13
1.9
E
12
2.2
E
12
2.5
ENE
11
2.5
ENE
10
2.1
ENE
10
2
E
12
1.1
NE
11
1.1
E
10
1.2
E
9
0.9
E
9
1.7
ENE
10
1.5
E
9
1.6
E
10
1.8
E
10
1.9
E
10
1.9
E
10
1.7
E
10
1.7
E
10
2.4
E
11
Wave Graph
Metric surfscale
Energy kJ
1421
1207
1065
1347
1505
1172
850
1136
284
240
251
125
518
388
480
643
716
716
563
541
1338
Wind (km/h)
5
ENE
10
ESE
10
NNE
20
NE
25
NE
15
NNE
5
N
15
SW
15
SSE
15
ENE
20
ENE
10
NE
15
NNE
20
NE
10
NNE
15
NNE
15
ENE
10
E
10
NE
15
ENE
15
ENE
Wind State
glassy
cross-on
cross-off
cross
cross
cross-off
cross-off
cross
on
cross-on
cross-on
cross
cross-off
cross
cross-off
cross-off
cross
cross-on
cross-off
cross-on
cross-on
High Tide
4:23PM1.35m
00:59AM1.34m
4:40PM1.42m
2:16AM1.40m
5:00PM1.47m
3:13AM1.47m
5:21PM1.50m
4:00AM1.54m
5:41PM1.52m
4:43AM1.58m
6:02PM1.53m
5:24AM1.59m
6:22PM1.53m
Low Tide
8:47PM1.21m
8:59AM0.25m
9:34PM1.12m
9:42AM0.17m
10:08PM1.02m
10:20AM0.13m
10:38PM0.92m
10:54AM0.14m
11:08PM0.81m
11:26AM0.18m
11:38PM0.70m
11:57AM0.26m
00:10AM0.61m
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
rain showers
thunderstorm
clear
rain showers
thunderstorm
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:52
4:54
4:54
4:56
4:56
4:56
4:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:34
6:32
6:31
6:30
6:30
6:29
 mm
3
13
2
16
8
2
3
24
7
8
7
Temp °C
29
29
25
28
27
24
26
26
24
28
27
25
27
28
25
28
29
26
28
27
25
Feels °C
32
31
27
27
26
24
27
26
25
28
27
28
28
29
28
30
32
30
31
29
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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