Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.8°C
1.0° 

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 25 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 9AM (local time) - 3ft (0.9m), 12s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 5.5ft (1.7m), 13s period, SSW swell with 1,011 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 9AM (local time) - 3ft (0.9m), 12s period with SSW 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 Wednesday (Aug 26) at 9AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.9m and 9s. Another secondary swell of 0.8m and 5s 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 1.7m 13s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Aug 27) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Wed 26th Aug)3ft (0.9m) 12s
Best Surf 9AM (Wed 26th Aug)3ft (0.9m) 12s
Most Powerful 3AM (Wed 2nd Sep)5.5ft (1.7m) 13s

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


The Lowdown

Alright folks, Rusty here. Let's have a look at what's on the menu for the next couple of weeks at Big Ben.

Overall, it's a mixed bag. We've got a decent run of clean, small waves kicking things off, but then a big, messy, and eventually oversized swell moves in for the second week that’s really only for the brave or the kite crew. The first week is where the real surf is.

We start off on Wednesday the 26th of August with a clean morning. The swell is a modest 3 ft from the SSW with a 12-second period, feeling pretty weak but delivering a decent amount of energy. The wind is a light cross-off, and the water temp is about average for the time of year. It’s not big, but it looks fun and clean. The afternoon gets a bit choppy with a stronger cross-breeze, so get out early.

Thursday the 27th has a couple of nice windows. The morning is a bit sketchy with a risk of storms, but the WSW wind is cross-off, keeping the 2 ft S swell clean. The afternoon actually looks better: a 3 ft SSW swell with a light cross-off breeze from the NNE. That’s a solid window for a small-wave session.

Friday the 28th is another clean morning, with a 3 ft easterly swell and light winds. The afternoon fades a bit into marginal territory.

Saturday the 29th and Sunday the 30th are pretty ordinary. Saturday is blown out by a cross-shore wind, and the swell drops to 2 ft. Sunday is glassy but tiny, with only 2 ft of weak E swell. You could probably find a longboard wave, but it’s flat by any standard.

The first week has a couple of subtle highlights. The best of the bunch is likely Wednesday morning the 26th. The swell is clean, the 3 ft SSW swell is well-directed for this beach/jetty setup, and with a cross-off wind, it’s the most user-friendly wave of the week. The morning of Thursday the 27th is also a standout for the same reasons, just a touch smaller. Keep in mind the crowds are possible here, so get in early.

Heading into the second week, things get weird. Monday the 31st of August has a small, clean 1 ft swell with a very long 15-second period. That long period will make it a bit fat and straight on a beach setup, but it’s sparkly. Tuesday the 1st of September sees a bump in size to 4-4 ft, but the wind goes junk, making it a marginal call.

Then from Wednesday the 2nd of September, the swell pumps up. On the 2nd, we see 7 ft SSW swell but with a strong cross-onshore wind, making it choppy and messy. The energy is huge, but the quality is poor. This pattern continues into the 3rd and 4th with 6 ft to 4 ft swells, but the wind is always on it. Honestly, this setup over 5 ft with onshore wind looks more interesting for kite surfing than paddle surfing.

The real bomb hits on Monday the 7th and Tuesday the 8th of September. The swell builds to 10 ft, then 15 ft from the SSE with a very long 14-second period. The energy readings are massive. The file says the break is too big. This is expert-only territory, and even then, the wind is cross-onshore, so it’s going to be a washing machine. The swell direction is also a bit off for this break’s optimum.

By the 9th and 10th, the swell drops back to 7 ft and then 4 ft, but the wind is still strong and cross-shore, keeping things messy. There’s a promising but less certain window on Saturday the 5th of September with a clean 2 ft to 3 ft swell and light cross-off winds, but it’s a long way out.

So, to sum it up: the first few days are your best bet for clean, fun waves. The second week is a write-off for the average surfer.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Thu morning. Warm (max 30°C on Wed morning, min 24°C on Thu afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Sun night. Warm (max 26°C on Sat morning, min 23°C on Sat night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
3
0
0
2
2
0
2
1
1
0
0
1
1
1
0
1
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
S
11
0.9
SSW
12
0.9
SSW
12
1.4
SW
11
0.6
SW
11
1
SSW
11
0.8
E
13
0.8
E
12
0.7
E
12
0.7
E
12
0.6
E
12
0.6
E
11
0.5
E
11
0.6
E
11
0.6
E
12
0.5
E
11
0.4
SSW
15
0.5
S
14
0.6
SSW
12
Wave Graph
Metric surfscale
Energy kJ
326
233
196
439
88
240
212
193
139
137
98
93
63
94
98
62
73
100
115
Wind (km/h)
25
SW
15
WSW
25
SW
25
SW
15
WSW
10
NNE
20
SSW
10
W
15
WSW
5
N
20
NE
15
NE
10
NNW
0
NNE
5
ESE
15
NE
15
NNE
15
NNE
10
NNE
Wind State
cross
cross-off
cross
cross
cross-off
cross-off
cross-on
cross-off
cross-off
glassy
cross
cross
cross-off
glassy
glassy
cross
cross-off
cross-off
cross-off
High Tide
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
6:21AM1.55m
6:26PM1.55m
Low Tide
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
12:23PM0.54m
00:45AM0.42m
clear
clear
clear
part cloud
mod rain
light rain
light rain
thunderstorm
cloud
rain showers
part cloud
part cloud
part cloud
part cloud
cloud
light rain
rain showers
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:05
5:07
5:07
5:09
5:09
5:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:15
6:14
6:13
6:10
6:09
6:08
 mm
8
2
2
2
1
3
2
Temp °C
27
30
29
27
27
24
26
27
28
25
26
26
25
26
26
24
23
24
23
Feels °C
28
32
30
29
30
26
29
29
30
30
27
27
27
30
30
25
25
26
26
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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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