Big Ben Surf Break

Lat Long: 35.12° N 140.12° E

Big Ben Surf Forecast and Surf Report

Issued: 2 pm 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Ben sea temperature is
26.2° 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 7 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 12AM (local time) - 6ft (1.9m), 14s period, ESE swell with glassy winds.
  • Most powerful swell: Friday 14 Aug, 6PM (local time) - 8ft (2.5m), 12s period, ENE swell with 1,977 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 6ft (1.9m), 14s 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 1.1m and 11s. 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 12s and forecast to arrive on Friday (Aug 14) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Aug 10) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 9th Aug)6ft (1.9m) 14s
Best Surf12AM (Sun 9th Aug)6ft (1.9m) 14s
Most Powerful 6PM (Fri 14th Aug)8ft (2.5m) 12s

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


The Lowdown

Alright, Rusty here, checking the waves at Big Ben for the next couple of weeks. It’s a beach and jetty setup, exposed to the swell, but it’s an inconsistent spot, so you gotta wait for the right moment. Water temp is 79°, which is normal for this time of year.

We start Friday, August 7th, and it’s not looking good. A 6ft swell from the south, but the wind is a cross-on 12 mph from the SSE, making it choppy. The energy is moderate at 1300. Skip it.

Saturday the 8th is better. The morning has a 5ft SSW swell with clean offshore wind from the SSE at only 3 mph. That’s glassy. The energy is still decent at 889. The afternoon sees a 5ft ESE swell with a 13-second period – that’s a long period groundswell, so it’ll have shape, but it might wall up at the beach. Energy jumps to 1041. Good for beginners.

Sunday the 9th is a step up. The morning has a 7ft E swell, 13-second period, and a light cross-shore wind. Energy is 1616. The afternoon holds similar size, but the breeze turns cross-on. Still a solid day.

Monday the 10th is the real standout. The morning has a 7ft E swell, 12-second period, and clean cross-off wind from the NNE at 15 mph. That’s 1550 energy and clean. The afternoon gets bigger, hitting 8ft from the ENE, but the wind turns cross-shore. Energy is massive at 3533. The morning is the pick for the cleanest waves.

Tuesday the 11th is a step down. The morning has a 7ft ENE swell, clean wind, but energy drops to 1443. The afternoon gets smaller and choppier.

Wednesday the 12th is a strange one. The morning is junk – 8ft, but a short 7-second period and onshore wind. The afternoon, though, is a surprise: 3ft SSW swell, clean offshore wind from the NW at 3 mph. The guidance says “very good surf conditions.” Energy is 562. Small, but glassy.

The 13th and 14th have 5ft to 8ft E swells, with moderate energy and clean cross-off winds. The morning of Friday the 14th is the best there – 8ft, 12-second period, clean. Energy is 1964.

The 15th and 16th keep the swell in the 7ft to 8ft range, with clean offshore winds, especially the afternoon of Sunday the 16th. That has a 6ft ENE swell, a light 6 mph cross-off breeze, and the guidance says “very good surf conditions.” A late gem.

After that, it fades. The 17th and 18th are smaller and onshore. By the 19th, we’re down to 5ft. The 20th through the 22nd are weak, with small swells under 4ft, low energy (around 300-360), and onshore winds. It’s a slow fade.

The standout is Monday the 10th morning – that 7ft clean, lined-up E swell with cross-off wind is the best of the batch. The Sunday the 16th afternoon is a close second. For the rest, it’s a waiting game. Big Ben is inconsistent, so this empty run at the end is normal. Keep an eye on it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Fri afternoon, min 23°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 29mm), heaviest during Tue afternoon. Warm (max 28°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light.

Fri
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
2
2
4
3
3
4
3
2
3
2
2
0
0
3
2
1
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
S
12
1.6
S
11
1.4
SSW
11
1.4
ESE
13
1.9
ESE
14
2
E
13
2
E
13
1.8
E
12
2.1
E
12
2.5
ENE
12
2.1
E
11
2.1
ENE
12
1.7
ENE
12
1.1
E
10
2.3
ESE
7
0.9
SSW
11
1.5
E
10
1.6
E
10
1.6
E
10
1.7
E
11
Wave Graph
Metric surfscale
Energy kJ
887
617
513
633
1360
1421
1335
942
1269
1840
1104
1220
791
250
448
223
468
562
551
646
Wind (km/h)
20
SSE
10
S
5
SSE
15
SE
5
SSW
10
ENE
10
E
15
NNE
25
NNE
25
NE
15
NNE
25
SW
20
SW
20
SSE
20
SE
5
NW
10
E
20
NE
20
ENE
15
NNE
Wind State
cross-on
cross-on
on
on
glassy
cross
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross
cross-on
on
off
cross-on
cross
cross
cross-off
High Tide
9:44PM1.36m
4:28PM1.26m
11:10PM1.33m
4:23PM1.35m
00:59AM1.34m
4:40PM1.42m
2:16AM1.40m
5:00PM1.47m
3:13AM1.47m
5:21PM1.50m
4:00AM1.54m
5:41PM1.52m
Low Tide
6:50AM0.45m
6:32PM1.25m
8:04AM0.35m
8:47PM1.21m
8:59AM0.25m
9:34PM1.12m
9:42AM0.17m
10:08PM1.02m
10:20AM0.13m
10:38PM0.92m
10:54AM0.14m
11:08PM0.81m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
thunderstorm
mod rain
thunderstorm
thunderstorm
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:52
4:52
4:54
4:54
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:36
6:35
6:34
6:32
6:31
6:30
 mm
2
6
7
5
3
5
1
1
3
Temp °C
29
25
29
28
25
29
28
24
28
28
24
26
26
26
27
25
25
28
28
25
Feels °C
31
28
32
29
28
30
30
26
26
26
25
25
25
25
29
28
28
28
29
27
  • 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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