Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.9°C
1.1° 

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 24 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 12PM (local time) - 2.5ft (0.7m), 12s period, SW swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 3AM (local time) - 7ft (2.2m), 13s period, SSE swell with 1,641 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 12PM (local time) - 2.5ft (0.7m), 12s period with SW 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 Thursday (Aug 27) at 12PM. The primary swell is predicted to be 0.7m and 12s period with a secondary swell of 0.6m and 13s. Another secondary swell of 1.0m and 6s is also forecast. 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 2.2m 13s and forecast to arrive on Tuesday (Aug 25) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Tuesday (Aug 25) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Thu 27th Aug)2.5ft (0.7m) 12s
Best Surf12PM (Thu 27th Aug)2.5ft (0.7m) 12s
Most Powerful 3AM (Tue 25th Aug)7ft (2.2m) 13s

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.

Alright mate, we’ve got a bit of a story unfoldin’ over the next couple of weeks. The opening week has a slow start with small, messy waves. But the back end of the forecast, especially around the weekend of the 5th and into early September, is where things get seriously interesting.

Big Ben is the only break on the radar. It’s a beach and jetty setup, exposed to the southerly quadrants. It’s inconsistent, so don’t expect a wave every minute.

Right now, we’ve got a long-period groundswell (16 seconds) pushing in at about 7 feet from the SSE on Monday the 24th. The water is sitting at a warm 82°, which is a touch warmer than usual for this time of year. The problem is a moderate cross-shore wind is putting a cross-chop on it, and the wave comment calls it marginal. The combined energy is strong at 2205. It’s surfable, but expect some bumpy faces. Tuesday the 25th is in the same boat – 7 feet and then 6 feet from the S, but the wind stays cross, and the energy drops to 1670 and then 1149. It's a bit of a grind.

Wednesday morning the 26th is a tease. The swell drops to 3 feet from the SSW, but the wind goes cross-offshore and the wave comment says "clean". The energy is moderate at 637. It would be clean, but it's small. Then Wednesday afternoon, the wind cranks up to 19 mph from the SW, making it a lumpy mess, and the score plummets. Thursday the 27th morning stays small at 3 feet with cross-off wind, but the real window opens Thursday afternoon. A glassy 3 feet wave from the S with a period of 10 seconds, offshore wind, and the wave comment says "expect very good surf conditions". The energy is moderate at 525. That's your best bet for the first week.

From Friday the 28th through to Tuesday the 1st of September, we’re in a dry spell. The swell drops to 2 to 3 feet from the E. There’s a moment of flat calm, glassy conditions on Monday morning the 31st, but the waves are tiny. It’s a long, quiet patch for about 5 days.

Then things start to rumble again. Wednesday the 2nd and Thursday the 3rd of September see a new SSW swell build. It goes from 3 feet to 4 feet, with the period staying between 10 and 13 seconds. The energy climbs from 269 to 693. The wind is cross-onshore though, so it stays a bit choppy. It gets bigger Friday the 4th, with a 5 foot morning building to 6 feet in the afternoon from the SSW, period up to 14 seconds (getting long), and energy jumping to 1315. The wind is light, but it's still cross-onshore.

Now, Saturday the 5th of September is a wild card. The morning brings a massive 8 foot SSW swell with a 13-second period, and a howling 43 mph gale from the WSW. That’s a stormy, dangerous mess – not for paddling. But then! Saturday afternoon, the wind swings to a light offshore from the NNW, and the swell jumps to 12 feet from the SSW with a 13-second period. The energy is a massive 6810. The guidance says it's too big for this break, and I have to agree. At 12 feet, this is expert territory only, and even then, the beach/jetty setup might turn into a washing machine. The long period means it might be a bit straight and dumpy on the sand, not the kind of wave you can just paddle into.

Sunday the 6th of September is still very big at 10 feet from the SSW, with a 13-second period and 2338 energy. The wind is cross-offshore, so it will be clean, but again, it's only for experts. The size drops to 8 feet by Sunday afternoon, and then slowly fades into the next week. There are usable, clean waves for experts on the 5th and 6th, but it’s a real grinder. For most of us, that Saturday afternoon call is just something to watch from the sand.

So, the standout window is Thursday the 27th of August afternoon for a clean, fun little wave. And for the big-wave crew, Saturday the 5th and Sunday the 6th of September are the big, clean, powerful swells to look at, if you're charging.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Thu morning. Warm (max 30°C on Wed morning, min 24°C on Thu afternoon). Winds decreasing (fresh winds from the SW on Wed night, calm by Thu morning).

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Thu night. Warm (max 28°C on Fri morning, min 23°C on Sat night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
1
0
2
0
0
1
0
2
2
0
2
0
0
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
SSE
13
2
S
13
1.8
S
12
1.2
S
11
1
SSW
12
1
SSW
12
1.6
SW
12
0.7
SW
11
0.6
E
13
0.8
E
13
0.8
E
12
1
SW
10
0.7
E
12
0.6
E
12
0.6
E
11
0.6
E
11
0.6
E
12
0.6
E
12
0.6
E
12
Wave Graph
Metric surfscale
Energy kJ
968
1335
895
326
288
278
747
119
128
212
193
188
137
98
91
89
104
103
98
Wind (km/h)
20
SW
20
SW
25
SW
25
SW
15
WSW
25
SW
30
SW
20
WSW
20
ENE
5
SE
5
NNW
15
SW
5
NW
15
NE
15
ENE
15
NNE
15
NNE
10
ENE
10
NNE
Wind State
cross
cross
cross
cross
cross-off
cross
cross
cross-off
cross
glassy
glassy
cross
glassy
cross
cross
cross-off
cross-off
cross
cross-off
High Tide
1:46AM1.34m
4:31PM1.46m
2:51AM1.43m
4:50PM1.50m
3:40AM1.52m
5:08PM1.52m
4:23AM1.58m
5:27PM1.54m
5:03AM1.61m
5:47PM1.54m
5:42AM1.60m
6:06PM1.55m
Low Tide
9:17PM1.13m
9:13AM0.27m
9:46PM1.02m
9:53AM0.22m
10:14PM0.89m
10:28AM0.21m
10:42PM0.76m
10:59AM0.24m
11:10PM0.64m
11:29AM0.31m
11:40PM0.54m
11:57AM0.41m
00:11AM0.46m
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
light rain
light rain
cloud
part cloud
part cloud
rain showers
thunderstorm
rain showers
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:05
5:05
5:07
5:07
5:09
5:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:15
6:14
6:13
6:10
6:09
 mm
2
2
2
1
2
1
Temp °C
26
29
29
26
30
29
27
29
24
24
28
28
26
27
27
24
27
27
25
Feels °C
29
30
30
27
32
30
28
31
25
27
31
30
31
29
29
26
30
31
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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