Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.8°C
0.2° 

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 2 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 3PM (local time) - 10ft (3.0m), 8s period, E swell with cross-shore winds.
  • Most powerful swell: Tuesday 8 Sep, 3AM (local time) - 15ft (4.5m), 10s period, S swell with 3,700 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 3AM (local time) - 2ft (0.6m), 10s 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 Friday (Sep 04) at 3AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.7m and 5s 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 4.5m 10s and forecast to arrive on Tuesday (Sep 08) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Fri 4th Sep)2ft (0.6m) 10s
Best Surf 3PM (Sun 6th Sep)10ft (3.0m) 8s
Most Powerful 3AM (Tue 8th Sep)15ft (4.5m) 10s

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


The Lowdown

Alright, let’s get into it. It’s a tricky stretch ahead for our stretch of coast, and you’re gonna need some patience. The long-range models are showing a pulse of energy, but it comes with a lot of baggage – wind and size issues mostly. There are a few windows where it could line up, but don’t expect a classic week of perfection.

The first real chance to get wet doesn’t show up until the end of the first week. For the early part of the period, it's mostly small, chopped-up leftovers and onshore slop – not worth the paddle. Thursday the 5th through Saturday the 7th, the swell starts to build, but it’s coming with a ton of wind and rain. Saturday afternoon, the swell jumps to 5ft but the period drops to 6 seconds, which is just short-period wind-slop. The energy is still weak (273), and with a fresh cross-shore breeze, it’s going to be a mess.

Sunday the 8th is when things get serious size-wise. The swell is pumping up to 7ft in the morning, but it’s onshore, lumpy, and building fast (479 energy). By Sunday afternoon, we’re looking at a solid 10ft with 8-second period – that’s a lot of raw, unruly power. The energy reading jumps to 1014, which is strong, but it’s just too big and too junky for the break to handle. This is not a day for the faint-hearted; this is a day to stay on the beach unless you’re a total charger, and even then, it’s going to be a beatdown. Monday morning the 9th is even bigger – 10ft plus, with energy hitting 1129. The wind is lighter, but the swell is still predicted to be too big for this spot. It's just a wall of whitewater. This is all happening with stormy winds and a ton of rain – really poor visibility and dangerous conditions.

From Tuesday the 10th through to the 16th, the swell eases but the quality isn't there. It hovers around the 4ft to 7ft mark, mostly with short-period, cross-shore winds and lumpy conditions. The energy drops back down to moderate (404–742). There are a few glimmers – Friday the 13th morning has that 4ft with a 14-second period and a cross-off wind, but the overall score is still poor. It looks clean, but there’s no real push. The period is long, but the size is too small to do much at this break.

The standout window arrives on the morning of Tuesday the 17th. This is where it all comes together. Finally, we get a proper offshore wind (NNW at 3 mph), the swell is a clean 4ft, and the period stretches out to a very long 12 seconds. The energy is moderate (498), but that period means it’s a proper groundswell, with real power behind it. There will be long lulls between sets, but when they come, they’ll be clean and lined up. The water temp is a warm 80°F with a normal anomaly, so it’s comfortable. This is the day to call in sick. This is the one. It’s promising, but being 12 days out, don’t book the charter just yet – forecasts can shift.

The following Thursday the 19th also shows a similar pulse – 4ft with a 12-second period and a light offshore wind in the morning – but it’s a bit more of a gamble. It could be a repeat of Tuesday, but the wind might clock around onshore by the afternoon. Keep an eye on it.

So, bottom line: the near-term is a write-off. Don’t get your hopes up for the next 10 days. Save your energy for the 17th. That morning with the offshore wind and long-period groundswell is the only real standout on offer. It could be well worth the wait.

Rusty.

Short Range Forecast

Heavy rain (total 80mm), heaviest during Fri night. Warm (max 30°C on Thu morning, min 21°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NE by Sat night).

Days 4-6 Weather Summary

Heavy rain (total 127mm), heaviest during Sun night. Warm (max 28°C on Tue morning, min 22°C on Sun morning). Winds increasing (light winds from the E on Mon morning, fresh winds from the S by Mon night).

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
0
0
0
0
0
!
!
!
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
E
10
0.7
E
10
0.6
E
10
0.7
E
9
0.7
E
9
0.7
SSW
9
0.6
SSW
10
1.6
E
6
1.7
ENE
6
2.2
ENE
7
3
E
8
3.5
E
9
3
ESE
9
2.5
SE
8
4
S
10
4
S
10
3.5
S
10
3
S
10
3
S
10
3
S
10
3
S
9
Wave Graph
Metric surfscale
Energy kJ
196
94
68
83
81
78
63
184
230
435
990
1958
1115
881
3271
2954
2491
1618
1586
1814
1507
Wind (km/h)
15
SSW
25
SW
10
E
10
ENE
15
ENE
20
NNE
20
NNE
30
NNE
30
NE
35
NE
30
ENE
30
ENE
10
E
30
S
35
S
30
S
30
S
25
S
30
S
30
S
30
SSW
Wind State
cross
cross
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
7:27PM1.48m
10:29AM1.12m
7:48PM1.43m
8:08PM1.35m
3:59PM1.32m
10:09PM1.26m
3:49PM1.38m
1:09AM1.28m
4:00PM1.44m
2:25AM1.38m
4:17PM1.48m
Low Tide
1:26PM0.96m
3:00AM0.47m
1:21PM1.08m
4:21AM0.52m
6:15AM0.51m
8:43PM1.26m
7:44AM0.44m
8:59PM1.14m
8:40AM0.37m
9:23PM1.01m
9:23AM0.31m
9:48PM0.87m
thunderstorm
light rain
rain showers
light rain
thunderstorm
heavy rain
heavy rain
light rain
mod rain
mod rain
mod rain
heavy rain
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:13
5:13
5:13
5:15
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:04
6:02
6:01
6:00
5:59
5:57
5:55
 mm
1
1
1
1
2
40
21
3
10
8
10
62
4
9
13
3
5
13
11
7
15
Temp °C
30
29
24
25
26
23
21
22
22
23
24
24
27
27
27
28
28
27
28
28
27
Feels °C
31
30
26
28
28
24
21
21
19
21
23
23
29
28
26
29
29
28
29
29
28
  • 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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