Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 am 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.2° 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: Saturday 15 Aug, 12PM (local time) - 10ft (3.0m), 11s period, E swell with cross-offshore winds.
  • Most powerful swell: Saturday 15 Aug, 3PM (local time) - 10ft (3.0m), 11s period, E swell with 2,130 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 3AM (local time) - 6ft (1.9m), 14s period with ESE 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 3AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 1.0m and 11s. 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 3.0m 11s and forecast to arrive on Saturday (Aug 15) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Aug 13) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 9th Aug)6ft (1.9m) 14s
Best Surf12PM (Sat 15th Aug)10ft (3.0m) 11s
Most Powerful 3PM (Sat 15th Aug)10ft (3.0m) 11s

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 offer for the next couple of weeks.

Honestly, it’s a bit of a mixed bag. We’re looking at a few days of clean, fun surf, then a whole lot of nothing. The standout is a magic window early Tuesday morning, and then a big, powerful swell that’s only for the brave right at the end of the second week.

The first real action is at Big Ben (beach/jetty). The water temp is sitting at 79°, which is pretty much bang on average for this time of year, so not a wetsuit worry.

We start Saturday the 8th and Sunday the 9th with some 5 ft to 7 ft swell from the ESE, but the wind is just a mess – cross-on or onshore. It’s rideable, but you’ll be battling a bit of chop. The energy is moderate, with readings around 889 to 1631, but it’s not clean enough to get excited about.

Then we get the good stuff. Monday morning the 10th has a 7 ft cross-shore swell from the E with a 12-second period, giving us a moderate 1512 energy reading. It’s a solid option, but the real gem is Tuesday morning, August 11th. The wind drops to dead calm, glassy conditions. We’ve got a 6 ft E swell, 11-second period, with a combined energy of 1046. That’s clean, smooth, and has some push. It’s a great session for an experienced surfer, but the 6 ft might be a bit much for total beginners. The afternoon turns to garbage with a storm risk, so get out early.

From Tuesday afternoon all the way through to the end of the first week, it’s a poor run. The wind is either onshore or cross-onshore, and the swell drops to 3 ft or 4 ft. The combined energy falls to 358, and the forecasts are all for poor conditions. It’s a write-off for a good few days.

We get a little reprieve on Friday the 14th with a 5 ft E swell and a clean cross-offshore wind, but the energy is only 548, so it’s marginal. It’s better than a kick in the teeth, but not a standout.

Now, the big one arrives on the weekend of the 15th and 16th of August. Saturday the 15th brings a 8 ft to 10 ft E swell with a powerful 2174 energy reading. Sunday the 16th is even bigger, with a 10 ft E swell (12-second period) and a massive 3043 energy reading. The wind is cross-off or cross-shore, so it’s clean. But listen, this is too big for Big Ben. It’s a flat beach/jetty setup, and 10 ft waves are going to be a washing machine. This is only for experts, and honestly, it might be more interesting for the kite surfers than paddle surfers. The forecast says "wind and tide favorable, but the swell is predicted to be too big for this break," so I’m passing on it.

After that, the energy drops right off. From Monday the 17th onwards, we’re back to small, messy, and poor conditions. The swell drops to 2 ft to 4 ft, and the combined energy sits around 160 to 300. The wind is mostly cross or onshore, with a few clean windows but no real swell to back it up. The forecast for the 22nd and 23rd of August is just poor.

So, to sum it up: Tuesday morning, August 11th is your best bet. Glassy, 6 ft, clean. If you can’t make that, then Monday the 10th is the next best thing. The second week is a write-off for any decent paddle surfing. It’s a long gap with nothing on offer, but that’s just how it goes sometimes.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Sat morning, min 22°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 48mm), heaviest during Thu night. Warm (max 28°C on Wed morning, min 23°C on Tue morning). Wind will be generally light.

Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
3
3
2
4
2
2
3
4
0
0
0
0
1
2
0
2
1
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)
1.4
SSW
11
1.4
ESE
13
1.9
ESE
14
2
E
13
2
E
13
1.9
E
12
2.1
E
12
2.1
E
11
2.2
ENE
10
1.9
E
11
1.5
E
10
1.3
ENE
10
1
E
10
1
E
9
1.1
E
10
1.3
E
10
1.1
E
10
1.8
E
10
1.5
E
10
1.5
E
10
2.3
E
10
Wave Graph
Metric surfscale
Energy kJ
513
633
1360
1421
1335
1048
1225
1095
1092
894
487
333
188
180
235
374
254
656
459
449
963
Wind (km/h)
10
SSE
15
SE
5
SSE
5
ENE
10
ESE
10
NNE
20
NE
20
ENE
15
NNE
0
SW
20
SSW
15
S
10
ESE
15
E
10
NE
15
NE
20
E
20
NE
30
NNE
30
NNE
30
N
Wind State
cross-on
on
cross-on
cross
cross-on
cross-off
cross
cross
cross-off
glassy
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
cross-off
cross-off
cross-off
High Tide
4:28PM1.26m
11:10PM1.33m
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
Low Tide
6:32PM1.25m
8:04AM0.35m
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
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:52
4:52
4:54
4:54
4:56
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:35
6:34
6:32
6:31
6:30
6:30
 mm
1
3
4
3
10
4
8
15
1
1
31
Temp °C
29
28
25
29
28
24
28
28
23
26
26
26
28
28
24
28
28
25
26
26
24
Feels °C
31
30
28
31
29
27
27
27
24
27
26
27
29
30
27
29
29
27
26
25
24
  • 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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