Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.2° C
0.4° 

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 16 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 3AM (local time) - 2.5ft (0.7m), 6s period, ESE swell with glassy winds.
  • Most powerful swell: Sunday 23 Aug, 12AM (local time) - 3.5ft (1.1m), 10s period, E swell with 254 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 3AM (local time) - 2.5ft (0.7m), 6s period with ESE 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 Thursday (Aug 20) at 3AM. The primary swell is predicted to be 0.7m and 6s 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 1.1m 10s and forecast to arrive on Sunday (Aug 23) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Sunday (Aug 23) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Thu 20th Aug)2.5ft (0.7m) 6s
Best Surf 3AM (Thu 20th Aug)2.5ft (0.7m) 6s
Most Powerful12AM (Sun 23rd Aug)3.5ft (1.1m) 10s

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


The Lowdown

Alright, let’s break it down.

For Big Ben, the water’s about normal for the season – 81°F. From Sunday the 16th all the way through Friday the 21st, we’re looking at small, weak, short-period easterly windswell (energy around 369), with cross-onshore winds. That’s poor, choppy, and not worth a second look. That’s a solid 8 days of nothing.

Saturday the 22nd and Sunday the 23rd are still marginal – swell around 3ft from the east, cross-shore winds, but just not enough to get excited about.

Then Monday the 24th afternoon: the swell drops to 2ft but the period opens up to 12 seconds from the southeast, with a clean cross-offshore breeze. Energy is 369, and the forecast is “expect good surf conditions.” That’s a sneak peak at some clean, fun waves.

Tuesday the 25th: we get 5ft from the SSE with a 14-second period – that’s real groundswell energy (1590). But the wind is cross-shore and moderate, so it’s a bit bumpy. Still, the size is there.

The standout is Wednesday the 26th morning. Swell at 7ft from the SSE, 15-second period, light cross-onshore wind. The energy is 2638. For a beach/jetty break, that long-period swell can make the waves a bit too lined up, but with that size, it’s going to be powerful. This one’s for experienced surfers only – 7ft is solid, and the 15-second period means long waits between sets but heavy, well-shaped waves.

From Thursday the 27th onward, the swell keeps pumping – 8ft, 10ft, even 28ft by the 31st – but the wind turns onshore, and the energy goes through the roof (3594 to 34977). The notes say it’s too big for the break. That’s big-wave territory, not for the average surfer.

So, the pick of the forecast is Wednesday the 26th morning at Big Ben – 7ft SSE groundswell, light wind, and a whole lot of juice. Don’t sleep on it.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Sun afternoon. Warm (max 27°C on Mon morning, min 24°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 28°C on Thu morning, min 24°C on Wed night). Wind will be generally light.

Sun
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
1
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)
1.3
E
9
1.2
E
8
1.1
E
9
1
E
9
1
E
9
0.8
E
9
0.7
E
9
0.9
SE
7
0.9
ESE
7
0.8
ESE
7
0.7
ESE
6
0.7
E
7
0.9
E
8
0.9
ESE
7
0.8
ESE
7
0.9
SSW
11
0.9
SSW
11
1
E
10
1
E
10
1.1
E
10
Wave Graph
Metric surfscale
Energy kJ
264
205
185
146
153
96
73
67
64
60
44
44
94
89
57
176
183
196
192
254
Wind (km/h)
15
E
10
E
15
E
10
E
10
ESE
10
ENE
15
ESE
10
E
10
ENE
15
E
5
E
10
E
10
ESE
5
S
10
SSE
15
S
15
SSW
15
SSW
20
SSW
20
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
High Tide
6:42PM1.52m
6:45AM1.49m
7:03PM1.51m
7:29AM1.39m
7:24PM1.50m
8:20AM1.27m
7:46PM1.47m
9:31AM1.15m
8:09PM1.44m
8:37PM1.39m
9:26PM1.33m
Low Tide
00:43AM0.54m
12:52PM0.51m
1:20AM0.50m
1:17PM0.66m
2:01AM0.49m
1:39PM0.82m
2:52AM0.50m
1:53PM0.97m
4:00AM0.52m
5:40AM0.51m
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:00
5:00
5:01
5:01
5:03
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:28
6:25
6:24
6:23
6:22
6:22
6:20
 mm
1
1
Temp °C
26
24
27
27
25
27
27
25
27
27
25
28
28
25
28
28
26
28
28
26
Feels °C
27
26
28
29
28
29
29
28
30
29
28
31
31
29
30
30
29
30
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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