Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.3° 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 21 Aug 2026:

  • Best quality surf: Monday 24 Aug, 6AM (local time) - 3.5ft (1.0m), 20s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 12AM (local time) - 8ft (2.5m), 15s period, SSE swell with 2,763 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 9PM (local time) - 3.5ft (1.0m), 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 Saturday (Aug 22) at 9PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.4m and 9s. 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 2.5m 15s and forecast to arrive on Tuesday (Aug 25) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 4s period and expected on Sunday (Aug 23) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 22nd Aug)3.5ft (1.0m) 10s
Best Surf 6AM (Mon 24th Aug)3.5ft (1.0m) 20s
Most Powerful12AM (Tue 25th Aug)8ft (2.5m) 15s

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


The Lowdown

Alright, this is Rusty comin' at ya. Let's have a look at what's on the table for Big Ben.

Right off the bat, the first few days are a bit of a write-off. We've got some small, choppy, cross-shore junk from Friday the 21st through to Sunday the 23rd. Not worth paddling out for. The water temp is sitting at a warm 81°, which is pretty normal for this time of year, so at least you won't freeze while you're waiting for something decent.

But hold on, because Monday the 24th is where the magic happens. The early morning is looking absolutely pristine. We're talking a solid 5 foot of groundswell rolling in from the SSE, with a super long 19-second period. That's proper energy, pushing a combined swell energy of 1908 – that's a strong pulse. And the wind? Dead calm, glassy conditions. For a beginner-friendly spot like Big Ben, this is about as good as it gets. Clean, lined-up waves, and the long period will make paddling out a breeze. Just be aware it's exposed to the swell, so it'll be sizeable. This is the standout session of the whole outlook.

Later that Monday afternoon, the wind swings onshore and the swell jumps up to 7 feet, which starts to get a bit dicey for a beach/jetty setup, so the morning is the window.

Tuesday the 25th keeps the size up around 8 feet from the S, but the wind stays cross or cross-onshore, so it's not going to be as clean. Wednesday the 26th drops a bit to 5 feet but still has that cross-shore wind. For experienced surfers, it's rideable, but the magic is gone.

We then hit a rough patch of poor conditions with onshore winds and wind swell from the 27th through to the 29th. The 30th of August shows a little bump back to 4 feet from the SSE, but the wind is messy.

The start of September brings a new pulse. The 31st of August and 1st of September see another solid push of E swell, 7 to 6 feet, with moderate cross-shore winds. The energy is moderate to strong (around 1485-1608). It's not the perfect glass of the 24th, but it's consistent and there's plenty of push. The period is around 11-12 seconds, which is a decent groundswell.

After that, the swell tapers off through the first week of September, dropping back to 4 feet by the 3rd and getting a bit sloppy. The 5th of September has a final small pulse of SSW swell at 4 feet, but it's cross-onshore.

So, overall, you've got a long wait for the good stuff. The absolute standout is Monday morning, 24th August at Big Ben. That's your one. After that, the 31st of August and 1st of September offer the next best chance for some solid, chest-to-head-high waves, even if the wind isn't perfect. For the rest, it's a lot of waiting.

Rusty, signing off.

Short Range Forecast

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

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Thu morning. Warm (max 29°C on Tue morning, min 25°C on Mon night). Wind will be generally light.

Fri
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
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
1
0
2
4
2
4
3
1
2
3
1
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)
0.6
E
10
0.6
E
10
0.9
E
10
1
E
11
1
E
10
0.8
E
10
0.6
SSE
13
0.8
SSE
13
1.5
SSE
19
2.2
SSE
16
2.5
SSE
15
2.4
S
14
2.4
S
14
2
S
13
1.6
SSW
13
1.4
SSW
13
1.2
SSW
12
0.9
SW
11
0.9
E
14
0.9
E
13
Wave Graph
Metric surfscale
Energy kJ
65
66
175
231
198
120
106
209
1515
2429
2763
2091
2249
1370
750
669
390
206
289
277
Wind (km/h)
20
SSW
15
SW
15
SW
15
SW
5
NE
15
NE
10
ENE
5
NNE
0
ESE
15
SSW
15
SSW
15
SW
20
SSW
10
SSW
15
SSW
20
S
15
S
20
S
25
S
20
S
Wind State
cross-on
cross
cross
cross
glassy
cross
cross-on
cross-off
glassy
cross-on
cross
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
8:37PM1.39m
9:26PM1.33m
4:10PM1.33m
00:01AM1.29m
4:16PM1.41m
1:46AM1.34m
4:31PM1.46m
2:51AM1.43m
4:50PM1.50m
3:40AM1.52m
5:08PM1.52m
Low Tide
5:40AM0.51m
7:19AM0.44m
8:35PM1.23m
8:26AM0.35m
9:17PM1.13m
9:13AM0.27m
9:46PM1.02m
9:53AM0.22m
10:14PM0.89m
10:28AM0.21m
10:42PM0.76m
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
clear
thunderstorm
clear
clear
clear
part cloud
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:03
5:05
5:05
5:05
5:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:20
6:19
6:17
6:16
6:15
6:14
 mm
1
1
4
1
1
3
4
11
Temp °C
28
26
28
28
25
27
27
24
28
28
26
29
29
26
29
29
27
28
28
26
Feels °C
30
29
30
31
29
29
30
28
31
30
29
31
31
30
31
31
30
30
29
28
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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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