Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.7° C
1.3° 

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 4 Aug 2026:

  • Best quality surf: Tuesday 4 Aug, 3PM (local time) - 11ft (3.5m), 16s period, SE swell with cross-shore winds.
  • Most powerful swell: Tuesday 4 Aug, 9PM (local time) - 13ft (4.0m), 16s period, SE swell with 8,327 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 3PM (local time) - 11ft (3.5m), 16s period with SE 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 Tuesday (Aug 04) at 3PM. The primary swell is predicted to be 3.5m and 16s period with a secondary swell of 0.5m and 13s. Another secondary swell of 1.7m and 7s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Big Ben in the next 16 days are 4.0m 16s and forecast to arrive on Tuesday (Aug 04) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 7s period and expected on Monday (Aug 10) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Tue 4th Aug)11ft (3.5m) 16s
Best Surf 3PM (Tue 4th Aug)11ft (3.5m) 16s
Most Powerful 9PM (Tue 4th Aug)13ft (4.0m) 16s

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


The Lowdown

G’day, I’m Rusty, and I’ve got the lowdown on what’s coming our way.

Right off the bat, we’ve got a solid run of surf starting on Tuesday, August 4th, but it’s not for everyone. The water’s sitting at 82°, which is a touch warmer than normal for this time of year—nice for a long session.

The standout is Big Ben (beach/jetty), and it’s a beast. From Tuesday morning through Thursday afternoon, we’re looking at a serious SE swell pushing 12 ft to 13 ft with a very long period of 14 to 16 seconds. The combined energy is massive—check these numbers: 5978, 6344, 7289, 6408, 3554, and 3985—that’s all strong to very strong energy. The wind is cross-shore, mostly from the NE at 19 to 19 mph, so it’s not glassy, but it’s manageable. Here’s the big caveat: this swell is too big for this break. At over 8 ft, it’s strictly for experts only. The long-period groundswell will likely make it dumpy at the beach, so it’s more of a spectacle than a welcoming wave. Beginners, stay out of the water.

Then we hit a rough patch. From Friday, August 7th, through most of the weekend, the quality drops off hard. The swell drops to 7 ft to 8 ft from the SSW with a 15-second period, but the wind swings onshore from the ESE and SE, creating choppy, messy conditions. The combined energy drops to 2678 to 4469—still moderate to strong, but the scores are terrible. The storm risk and onshore wind make it a write-off. By Sunday afternoon, it’s a full-on mess with poor surf conditions.

The next glimmer comes on Monday, August 10th. The swell picks up to 8 ft to 10 ft from the ENE with a shorter 12-second period. The wind shifts to a cross-offshore from the NNE at 19 to 22 mph, which cleans things up nicely—the morning session is rated marginal, but the afternoon scores an 11/10 for such a big swell. The combined energy is 5847 and 4222, again strong. But again, at 10 ft, it’s experts-only territory. This is your best window if you’re a charger.

Tuesday, August 11th, gets nasty. Heavy rain and near gale-force winds from the N and NE at 31 to 34 mph make it dangerous and unrideable. The swell is 10 ft to 13 ft, but it’s a no-go.

Wednesday, August 12th, is a mixed bag. The morning is marginal with 8 ft E swell and cross-shore wind, but the afternoon sees a 10 ft E swell and cross-offshore wind, giving it another 11/10 rating for experienced surfers. The combined energy is 2481 and 2828—still strong. It’s still too big for beginners.

Now, the real gem appears on Thursday, August 13th, in the morning. The swell drops to 7 ft from the E with an 11-second period, and the wind is a light cross-offshore from the NNE at only 6 mph. The combined energy is 1215, which is moderate, but the conditions are excellent for experienced surfers. This is the most user-friendly window for the whole stretch—still big enough to be fun, but not overwhelming. The afternoon gets choppy again as the wind picks up.

The rest of the run from Friday, August 14th, through Sunday, August 16th, is a mixed bag of marginal and poor conditions. The swell holds around 7 ft to 8 ft from the E and ESE, but the wind is mostly cross-onshore, creating chop. The morning of Saturday, August 15th, offers a clean, light cross-offshore window with 8 ft ESE swell and only 1391 combined energy, rated excellent for experienced surfers. That’s another decent session.

From Monday, August 17th, onward, the surf fades. The swell drops to 4 ft to 6 ft from the ESE to SE with short periods of 9 to 12 seconds, and the wind stays cross-onshore. The combined energy falls to 477 to 1235—weak to moderate. It’s poor to marginal for the rest of the forecast. The last week is a quiet, choppy fade-out.

So, to sum it up: the best windows for experienced surfers are the afternoons of August 10th and 12th, and the mornings of August 13th and 15th. The rest of the run is either too big, too windy, or too small. Don’t expect much after the first week.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Thu morning, min 22°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Fri morning. Warm (max 29°C on Fri morning, min 22°C on Sun night). Wind will be generally light.

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
!
!
!
!
!
!
!
3
3
1
2
3
2
3
2
0
4
4
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
SE
16
3.5
SE
16
4
SE
16
4
SE
15
4
SE
14
3
SSE
14
3
S
14
3
S
14
2.5
S
14
2.5
S
15
2.3
SSW
15
2.2
SSW
14
2.2
SSW
15
2.1
SSW
15
2.2
SSW
15
2.3
SSW
16
2.3
SW
17
2.1
SW
17
1.9
SW
16
3
ENE
12
4
ENE
12
Wave Graph
Metric surfscale
Energy kJ
5567
5953
8201
7258
6402
3770
3062
3524
2846
2717
2258
1860
2066
1797
2325
2697
2947
2561
2065
2306
4478
Wind (km/h)
30
NE
25
NE
25
NNE
25
NNE
25
ENE
10
NNE
15
NE
15
ESE
10
E
15
ESE
20
SE
10
ESE
15
ESE
15
ESE
10
E
20
ENE
25
ENE
25
NNE
30
NNE
35
NNE
35
N
Wind State
cross
cross
cross-off
cross-off
cross
cross-off
cross
cross-on
cross-on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
High Tide
8:06PM1.45m
9:01AM1.18m
8:31PM1.43m
10:40AM1.08m
9:01PM1.40m
9:44PM1.36m
4:28PM1.26m
11:10PM1.33m
4:23PM1.35m
00:59AM1.34m
4:40PM1.42m
2:16AM1.40m
Low Tide
1:49PM0.67m
2:48AM0.56m
2:13PM0.83m
3:50AM0.55m
2:28PM0.99m
5:14AM0.52m
6:50AM0.45m
6:32PM1.25m
8:04AM0.35m
8:47PM1.21m
8:59AM0.25m
9:34PM1.12m
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
clear
clear
clear
part cloud
cloud
part cloud
part cloud
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:50
4:50
4:50
4:52
4:52
4:52
4:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:36
6:35
6:34
 mm
2
1
1
2
Temp °C
25
25
23
26
27
25
29
29
26
29
29
26
28
28
25
28
27
24
25
27
24
Feels °C
23
23
22
26
28
28
31
32
30
30
31
29
29
30
28
28
26
24
22
24
21
  • 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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