Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.2° C
0.5° 

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 9 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 12AM (local time) - 10ft (3.0m), 10s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Monday 10 Aug, 9PM (local time) - 8ft (2.5m), 11s period, ENE swell with 1,597 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 12AM (local time) - 10ft (3.0m), 10s period with ENE 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 Tuesday (Aug 11) at 12AM. The primary swell is predicted to be 3.0m and 10s period with a secondary swell of 2.3m and 10s. Another secondary swell of 0.5m and 10s 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 2.5m 11s and forecast to arrive on Monday (Aug 10) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Aug 15) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 11th Aug)10ft (3.0m) 10s
Best Surf12AM (Tue 11th Aug)10ft (3.0m) 10s
Most Powerful 9PM (Mon 10th Aug)8ft (2.5m) 11s

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


The Lowdown

Alright, grab your board and let’s talk shop. It’s me, Rusty, looking at the next couple of weeks for our stretch of coast. The long-range charts are showing a bit of a mixed bag, but there are definitely some windows to get wet.

We kick things off with a fun, albeit inconsistent, pulse of east-northeast swell. The first couple of days, Monday the 10th and Tuesday the 11th, have some size—around 8ft—but the wind is going to be the main character. Monday morning is clean with a cross-off breeze, but it gets chopped up by the afternoon. Tuesday looks like the better of the two, with a clean cross-off wind holding through the day and the swell easing slightly to 7ft. The energy is solid, in the 1700-1900 range, so it’s got some push, but this spot is inconsistent, so be prepared to wait for the sets. For a beginner, 8ft is getting on the big side, but the clean conditions will make it feel more manageable.

Then we hit a bit of a lull. Wednesday the 12th through Saturday the 15th is pretty poor. The swell drops and gets jumbled, with a lot of cross-onshore wind and a storm risk. It’s not worth the paddle. There’s a slight bump Thursday and Friday, but the quality just isn’t there. The energy tanks to the 400-900 range, and it’s just messy. I’d sit this part out.

Sunday the 16th is a tease. The swell comes back up to 7ft with a clean 11-second period, but it’s straight onshore from the southeast. The energy is solid—over 1200—but an onshore wind at this spot is going to make it lumpy and hard to read. It’s a maybe, but not a standout.

Now, here’s where things get interesting. Monday the 17th is the standout of the first week. We’ve got 7ft of east swell, a clean cross-off breeze, and the energy is up there at 915. The call is for “very good surf conditions.” This is the one to circle. The tide might be a factor, but the wind is right and there’s some push. It hasn’t been a perfect run, but this morning window looks proper.

After that, it’s a fade-out. The swell drops quickly, and the wind goes light and variable, but the waves just don’t have any size. From the 18th to the 23rd, we’re looking at ankle-biters to waist-high slop, with a lot of onshore breezes. The energy is weak, mostly in the 100-300 range. This is a long, flat stretch. If you’re a beginner, this is actually your time to get out, but for anyone wanting a real wave, it’s a desert.

The last few days of the window start to show a flicker of life. Around the 24th and 25th, there’s a new, longer-period swell from the south-southeast. It’s not big—5ft to 6ft—but the period jumps to 12 seconds, and that’s real groundswell energy. The energy readings are back into the 1000s. The wind is variable and light, which is a positive. This is a long-range call, so it’s promising but not certain. If it lines up, this could be the best of the lot, but it’s a week and a half away, so we’ll have to wait and see.

So, my pick of the fortnight is Monday the 17th. It’s got the best combo of size, clean wind, and solid energy. The long-range stuff on the 25th is a close second, but less of a sure thing. Don’t waste your time mid-week; go do something else. The ocean will come back around.

Rusty

Short Range Forecast

Moderate rain (total 14mm), heaviest on Tue night. Warm (max 28°C on Mon morning, min 21°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 19mm), heaviest on Thu morning. Warm (max 28°C on Thu morning, min 23°C on Fri afternoon). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
1
!
3
3
1
0
0
2
1
0
3
2
2
2
1
1
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
E
12
2.3
E
12
2.3
E
11
3
ENE
10
2.3
ENE
11
2.2
ENE
12
1.9
ENE
11
1.2
E
10
1.2
E
9
1.3
E
10
1.6
E
10
1.7
E
10
2.1
E
10
2
E
10
2.1
ENE
10
2
ENE
10
1.9
ENE
10
1.8
E
10
2
E
11
Wave Graph
Metric surfscale
Energy kJ
1065
1472
1347
1419
1230
1251
901
284
251
306
474
569
955
851
898
858
769
666
883
Wind (km/h)
15
NNE
20
NNE
30
NE
20
NNE
15
N
20
WSW
15
S
15
E
15
ESE
10
NNE
15
NE
15
ENE
15
NNE
25
N
30
N
20
N
15
NE
15
ENE
15
NNE
Wind State
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross-off
cross
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-off
High Tide
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
8:59AM0.25m
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
clear
part cloud
part cloud
light rain
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
rain showers
rain showers
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
2
9
2
1
2
3
3
2
2
1
1
1
4
2
Temp °C
24
28
28
24
28
26
24
27
28
25
28
28
25
27
24
24
28
28
25
Feels °C
26
28
27
24
28
25
25
28
29
28
30
29
27
26
23
26
31
31
27
  • 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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