Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 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: 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), 12s period, E swell with 2,417 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 12AM (local time) - 6ft (1.9m), 12s 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 10) at 12AM. The primary swell is predicted to be 1.9m and 12s period with a secondary swell of 0.7m and 12s. 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 3.0m 12s 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 1.5m 6s period and expected on Saturday (Aug 15) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 10th Aug)6ft (1.9m) 12s
Best Surf12PM (Sat 15th Aug)10ft (3.0m) 11s
Most Powerful 3PM (Sat 15th Aug)10ft (3.0m) 12s

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


The Lowdown

Hey crew, it's Rusty here. Let's stay local and look at what Big Ben has got cooking for the next couple of weeks.

We're kicking things off with a bit of a rusty start, to be honest. The best early window looks to be Monday the 9th of August through to Tuesday the 11th. Monday morning has some solid E swell, around 8ft with a nice 12-second period, and clean cross-off wind from the NNE. That's got some proper energy behind it (1717). Monday afternoon, the wind shifts to a cross-shore, making things a bit bumpier, so the morning is the pick. Tuesday morning is a standout: 7ft of ENE groundswell, period at 11 seconds, and light NNW winds keeping it clean. The energy is still pumping (1433). The water's sitting at a very warm 81°, which is pretty standard for this time of year.

Now, a word on the swell: when it’s over 5ft, it's not really a beginner's playground, and when it hits that 8ft mark, it's getting into the more experienced surfer's zone. Also, that longer period (11-12 seconds) means there's plenty of push, with better-shaped waves and longer lulls between sets, making the paddle-out a bit easier.

After Tuesday, things go pretty average. We've got a stretch from Wednesday the 12th through to Sunday the 16th where the combination of smaller swell, onshore winds, and stormy conditions makes most of it a write-off. You'll see some energy pop on Saturday the 15th with a 10ft E swell, but the finder straight up says it's too big for the break – that's a solid 2497 of energy, and with 12-second periods, it'll be heavy and won't be much fun here. That is definitely expert-only territory, and honestly, it looks more like a kite-surfing setup if the wind plays ball.

We see a little glimmer of hope on Monday the 17th of August. It's smaller, with 3ft to 4ft of short-period E swell, but the wind goes clean off from the NNW in the morning, and then goes glassy in the afternoon. It's a small window, but if you're after a clean, mellow surf, that afternoon glass-off is a beauty.

The second week, from around the 19th, looks patchy. There's another promising, more distant window on Sunday the 23rd of August. Both the morning and afternoon see some clean 4ft SSW groundswell with a very long 12-second period, and light cross-off winds. The energy is moderate (566-619), and the finder says "very good surf conditions". It’s a way off, so treat it as promising but don't lock it in just yet. The swell direction (SSW) is a bit off the optimum for Big Ben, but with those clean conditions, it could still be a sneaky fun one.

If you're out there, keep your eyes on Tuesday the 11th for the best early call, and maybe pencil in that Sunday the 23rd for a potential end-of-run treat.

Rusty, signing off.

Short Range Forecast

Heavy rain (total 22mm), heaviest during Wed morning. Warm (max 29°C on Sun afternoon, min 21°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 22mm), heaviest during Thu night. Warm (max 29°C on Thu morning, min 23°C on Wed night). Wind will be generally light.

Sun
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
3
1
3
4
3
1
0
0
2
1
1
2
2
2
2
3
!
3
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
13
1.9
E
12
2.3
E
12
2.3
E
11
2.5
ENE
10
2.1
ENE
11
1.9
ENE
11
1.3
E
11
1.2
E
10
1
E
9
1.1
E
9
1.4
E
9
1.5
E
10
1.8
E
10
1.9
E
10
1.8
E
10
1.8
E
10
2.4
E
11
3
E
12
2.2
ENE
10
Wave Graph
Metric surfscale
Energy kJ
1207
1065
1472
1371
1209
936
961
411
284
173
207
339
461
682
740
643
669
1320
2417
988
Wind (km/h)
10
ESE
10
NNE
20
NNE
25
ENE
20
NNE
10
NNW
15
W
15
S
15
ESE
15
E
15
NNE
20
NNE
20
NE
15
NNE
25
N
20
NNE
15
N
20
NNE
15
NNE
5
ESE
Wind State
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
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
clear
part cloud
part cloud
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
clear
clear
thunderstorm
light rain
thunderstorm
part cloud
thunderstorm
thunderstorm
rain showers
<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
11
9
4
4
6
1
3
4
3
2
Temp °C
29
25
28
27
24
27
27
24
26
27
24
29
29
26
24
25
24
26
27
25
Feels °C
31
27
28
26
24
27
27
25
27
28
26
30
30
28
24
26
26
28
30
29
  • 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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