Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.9° 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 31 Jul 2026:

  • Best quality surf: Monday 3 Aug, 6PM (local time) - 10ft (3.0m), 18s period, SE swell with cross-shore winds.
  • Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 15ft (4.5m), 17s period, SSE swell with 12,523 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 3AM (local time) - 1ft (0.3m), 11s 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 Saturday (Aug 01) at 3AM. The primary swell is predicted to be 0.5m and 6s period with a secondary swell of 0.3m 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 4.5m 17s and forecast to arrive on Wednesday (Aug 05) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sat 1st Aug)1ft (0.3m) 11s
Best Surf 6PM (Mon 3rd Aug)10ft (3.0m) 18s
Most Powerful12PM (Wed 5th Aug)15ft (4.5m) 17s

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


The Lowdown

Alright, surfers, Rusty here. Let’s cut through the noise and get straight to what this 16-day window is looking like for our stretch of coast. The short version? We’ve got a big, messy, and powerful pulse of swell coming, and it’s going to be too much of a good thing for a while. Then things settle down into a long stretch of smaller but much more user-friendly waves.

Right now, the only game in town to start is Big Ben. It’s an inconsistent beach and jetty setup, but it gets going on Friday afternoon, July 31st. The water’s sitting at 80°, which is about average for this time of year, so no worries there. We’re looking at a small 2ft SSW swell with a short, weak 6-second period. The combined energy is a paltry 70, so it’s pretty anemic. A light south wind is making things a little bumpy. It’s surfable for a complete beginner, but it’s far from inspiring.

Saturday morning, August 1st, drops even further to a 1ft E swell, but it’s glassy. The period jumps to 11 seconds, but there just isn’t any power behind it. The energy is only 54. It’s a knee-high dribble at best. Saturday afternoon sees a bit more size, 2ft from the SE with a long 16-second period, and the energy climbs to 201, but a cross-shore wind chops it up. It’s marginal.

Sunday, August 2nd, is where things start to get interesting. The swell builds to 4ft from the ESE with a 16-second period. The energy jumps to a moderate 1009. It’s still a bit cross-chop, but there’s some push to it now. The morning is the pick of the day. By Sunday afternoon, it’s up to 5ft, but a 15 mph crosswind makes a mess of it.

Now, here’s the big story. Starting Monday, August 3rd, the ocean is going to fire up in a serious way, but it’s going to be too much of a good thing. The swell jumps to 8ft on Monday morning, then 8ft by the afternoon. The period is a solid 16 to 18 seconds, and the energy is strong, hitting 4726 by Monday afternoon. By Tuesday, August 4th, it’s a monster. The swell is a good 13ft to 15ft, with a 16-17 second period and energy readings of 8618 and 10286. This is a serious, groundswell-driven event.

The problem is, this is a beach and jetty break. A long-period swell like this, especially over 15 seconds, is going to be breaking too straight and closing out. And at this size, it’s only for experts, if anyone at all. The wind stays cross-shore to onshore through this whole episode, adding more chaos. To be honest, with that much swell, strong winds, and a beach setup, this looks way more interesting for the kite surfers than for us paddle surfers. This conditions last through Thursday, August 6th, and into Friday morning, August 7th. It’s still huge on Friday morning at 10ft before it starts to back off.

After that, the ocean starts to exhale. Friday afternoon, August 7th, still has 8ft of S swell, but it’s a mess with onshore winds. The real transition happens over the weekend. Saturday and Sunday, August 8th and 9th, see the swell drop to 5-6ft, from the SW, with a 15-second period. It’s still cross-onshore and bumpy, and the energy has dropped to the 1500-1800 range. It’s a clean-up period.

The second week is where we find the real gems. The swell settles into the 5ft to 8ft range, but it’s coming from the E and ENE, which is offshore for Big Ben. Monday, August 10th, sees a 6ft E swell with a 13-second period. The morning has a fresh 19 mph cross-offshore wind, and the report says it’s clean. That’s a huge positive. The energy is moderate at 1522.

The standout of the whole window, for me, is Thursday morning, August 13th. We’ve got a 6ft E swell with a 12-second period, and it’s cross-offshore and clean. It’s the first day in the outlook that explicitly calls for excellent surf conditions for experienced surfers. The energy is a moderate 1472. This is the one to circle on the calendar. It’s still over a week out, so treat it as promising, but the ingredients are all there. The Friday morning after that, August 14th, also looks good with a 6ft E swell, clean, and cross-offshore, though a little more wind.

So, to sum it up: we have a massive, unsurfable pulse of swell early on, followed by a few days of messy, average waves, and then a promising clean-up into the middle of the following week. That Thursday morning on the 13th is the one you want to plan for.

Stay stoked.

Rusty

Short Range Forecast

Mostly dry. Warm (max 31°C on Sat morning, min 23°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed night. Warm (max 30°C on Thu morning, min 22°C on Mon night). Wind will be generally light.

Fri
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
1
2
3
1
3
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)
0.7
SSW
6
0.3
E
11
0.3
E
11
0.5
SE
16
0.7
SE
15
1.3
ESE
16
1.5
ESE
15
1.7
ESE
15
2.3
SE
16
2.5
SE
18
3
SE
17
4
SE
16
4.5
SE
17
4.5
SE
16
4.5
SSE
16
4.5
SSE
16
4.5
SSE
16
4.5
S
16
4
S
16
3.5
S
14
Wave Graph
Metric surfscale
Energy kJ
43
22
21
124
217
892
936
1368
2829
4444
5946
8190
9823
9362
10647
11629
11829
10549
7752
4489
Wind (km/h)
10
S
5
S
0
WNW
15
SW
0
SSW
15
ENE
25
ENE
25
NNE
25
NE
20
NE
15
NNE
25
NE
25
ENE
20
NE
20
NE
20
ENE
10
ENE
15
E
20
ESE
10
ESE
Wind State
cross-on
cross-on
glassy
cross
glassy
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross-on
cross-on
cross-on
on
on
High Tide
6:35PM1.50m
5:45AM1.54m
6:57PM1.49m
6:27AM1.49m
7:20PM1.48m
7:11AM1.41m
7:42PM1.47m
7:59AM1.30m
8:06PM1.45m
9:01AM1.18m
8:31PM1.43m
10:40AM1.08m
9:01PM1.40m
Low Tide
00:07AM0.76m
12:24PM0.23m
00:41AM0.69m
12:53PM0.36m
1:18AM0.62m
1:22PM0.51m
1:59AM0.58m
1:49PM0.67m
2:48AM0.56m
2:13PM0.83m
3:50AM0.55m
2:28PM0.99m
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
clear
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:47
4:48
4:48
4:50
4:50
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:43
6:42
6:40
6:39
6:38
6:37
 mm
1
Temp °C
30
26
31
30
27
29
27
24
26
26
23
27
26
24
28
28
26
30
29
26
Feels °C
33
30
35
33
31
32
27
24
26
26
23
26
25
24
30
30
30
32
31
30
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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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