Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 8 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
27.2° C
0.3° 

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 17 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 3AM (local time) - 3.5ft (1.1m), 13s period, SE swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 9PM (local time) - 4ft (1.2m), 14s period, SE swell with 606 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 3AM (local time) - 3ft (0.9m), 9s 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 Tuesday (Aug 18) at 3AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.4m and 10s. 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 1.2m 14s and forecast to arrive on Monday (Aug 24) at 9PM. 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 (Tue 18th Aug)3ft (0.9m) 9s
Best Surf 3AM (Tue 25th Aug)3.5ft (1.1m) 13s
Most Powerful 9PM (Mon 24th Aug)4ft (1.2m) 14s

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


The Lowdown

Alright, surfers, it’s Rusty here. Let’s be straight with you: the next week and a half looking out of Big Ben is a test of patience, not a celebration of waves. We’ve got a long, flat spell on our hands for the first few days, so don’t even bother waxing up until we get past that. We're looking at a real desert out there from now until about the 22nd, with nothing but dribbles and poor surf conditions. Light winds and small swell won’t be saving us either; this is a true waiting game.

Then, around the 23rd, we finally see a pulse of energy, but it’s not pretty. A bit of clean surf is forecast for the morning, but the swell is still small and the winds are iffy. The real story is a big, powerful long-period south-southeast groundswell that shows up on the 26th. The energy readings are massive, hitting numbers like 4328 and climbing to almost 5000, but for a beach/jetty setup like Big Ben, this is a case of too much of a good thing. The swell size is predicted to be around 10ft, which makes it strictly expert-only, and the cross-onshore winds are going to make it messy. Honestly, this setup looks more interesting for the kite surfers than for us paddle surfers.

That massive swell hangs around for a couple of days, but by the 28th and 29th, the wind goes nuts, hitting 37 mph at times, and turning the whole ocean into a washing machine. You don’t want any part of that. We then get a brief drop in size, but conditions are still marginal and cross-shore, so nothing there either.

The standout window, and the only real highlight in this whole 16-day forecast, is the morning of the 31st of August. That’s the one to circle. We’ll see dropping swell, around 6ft from the south-southeast, but the kicker is the wind. It's forecast to go glassy. Absolutely dead calm. For a beach break, that is a golden ticket, and the wave comment says it’s excellent for experienced surfers. With that size, it’s not a beginner wave, but for the rest of you, that’s your window. The energy is still moderate, around 1060, but the clean conditions will make it feel ten times better than anything else in this period.

After that, on the 1st of September, we see another bump in size, but it gets too big again for Big Ben, so we’ll leave that one alone.

So, keep your head up. The beginning is bleak, but that glassy morning on the 31st is the payoff for your patience. It’s a long way out, so take the call with a grain of salt, but it’s the one worth setting an alarm for.

Rusty, out.

Short Range Forecast

Some drizzle, heaviest during Mon night. Warm (max 28°C on Tue morning, min 24°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Sat morning. Warm (max 28°C on Fri morning, min 25°C on Thu night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
1
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
9
0.9
ESE
8
0.7
E
9
0.6
E
9
0.6
E
9
0.5
E
9
0.7
SE
6
0.4
SE
11
0.5
SE
11
0.5
SE
11
0.5
SE
11
0.8
ESE
9
0.7
SSW
10
0.8
SSW
10
1
E
10
1.1
E
10
1
E
10
0.9
E
10
0.8
E
9
Wave Graph
Metric surfscale
Energy kJ
151
107
73
54
55
39
37
43
57
57
66
101
92
111
188
228
186
151
108
Wind (km/h)
10
ESE
10
ESE
10
SE
5
ESE
10
ENE
10
ESE
5
ESE
5
ESE
10
SE
5
S
10
SSE
15
S
10
SSW
10
SSW
15
SSW
15
SSW
15
SSW
15
S
10
SSW
Wind State
on
on
on
cross-on
cross-on
on
on
cross-on
on
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
High Tide
7:29AM1.39m
7:24PM1.50m
8:20AM1.27m
7:46PM1.47m
9:31AM1.15m
8:09PM1.44m
8:37PM1.39m
9:26PM1.33m
4:10PM1.33m
00:01AM1.29m
Low Tide
1:20AM0.50m
1:17PM0.66m
2:01AM0.49m
1:39PM0.82m
2:52AM0.50m
1:53PM0.97m
4:00AM0.52m
5:40AM0.51m
7:19AM0.44m
8:35PM1.23m
rain showers
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
rain showers
thunderstorm
part cloud
rain showers
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:00
5:01
5:01
5:03
5:03
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:23
6:22
6:22
6:20
6:19
 mm
1
1
5
1
Temp °C
25
28
27
25
28
28
25
27
27
25
28
28
26
28
28
26
28
28
26
Feels °C
28
30
29
28
31
31
28
31
29
28
30
30
29
30
30
29
30
30
29
  • Map Icons:
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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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