Surf Forecasts:
Big Ben surf forecast from 29 Aug 2026:
- Best quality surf: Sunday 30 Aug, 6AM (local time) - 2ft (0.6m), 12s period, E swell with cross-offshore winds.
- Most powerful swell: Saturday 5 Sep, 3PM (local time) - 8ft (2.4m), 8s period, ENE swell with 672 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 3PM (local time) - 2ft (0.6m), 11s 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 29) at 3PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.5m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 2.4m 8s and forecast to arrive on Saturday (Sep 05) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Friday (Sep 04) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sat 29th Aug) | 2ft (0.6m) 11s |
| Best Surf | 6AM (Sun 30th Aug) | 2ft (0.6m) 12s |
| Most Powerful | 3PM (Sat 5th Sep) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Big Ben.
The next couple of weeks are a bit of a mixed bag, with a slow start and a real punchy finish. For the first few days, the surf is small and the conditions are pretty average, so don't get your hopes up too early. After that, we see a big jump in swell size, but the wind isn't always kind, and it gets seriously big towards the end of the first week into the second. The real standout window looks like it’s shaping up for the second Saturday, so keep that in mind.
Starting off this Saturday, the 29th of August, it’s a little on the weak side. We’ve got waves around 2ft coming from the east with a 12-second period, but the wind is either onshore or messy. The water is 82°, which is a touch warmer than normal for this time of year. The combined energy is low to moderate (118). Not really worth getting wet for.
Sunday the 30th isn't much different. Still small at 2ft from the east, but the Sunday afternoon shows a glassy window with that 12-second period east swell and a nice 196 energy reading. The waves are clean but tiny. It’s a paddle, but not a score.
Monday the 31st drops even smaller, down to 1ft, though the period stretches to 14 seconds. The energy is still moderate (187). The wind is okay, but it’s just too small to get excited about.
Now, Tuesday the 1st of September is where things perk up. The morning is glassy, and the swell jumps to 4ft from the east at 12 seconds. The combined energy is strong (406), and the wind is glassy. This is the first real chance for a clean, fun wave. The break is a beach/jetty setup, so with that east swell, it should be working. The water is still that warm 82°. It’s a beginner-friendly spot, so don’t expect barrels, but for a clean knee-to-waist high wave, it’s a good option.
The rest of the week into the weekend is a bit of a write-off. Wednesday and Thursday are small and choppy. Friday the 4th gets lumpy and messy, with the swell picking up to 8ft in the afternoon, but with a short 8-second period and strong cross-shore wind (15 mph), it’s a mess. The energy is very strong (754), but it’s just not for paddling. This is more of a kite-surfing setup than a paddle surf one.
Saturday the 5th and Sunday the 6th are the same story. The swell is big, 7ft to 8ft, but period is short (7-9 seconds), and the wind is all over the place. The energy is very strong (up to 1199), but the quality is poor. For a beginner spot, this is too big and messy.
The start of the second week, Monday the 7th and Tuesday the 8th, we see the swell really start to pump. It’s 8ft to 10ft from the east, with a 12-second period on Tuesday. The combined energy is huge (2464 to 3858). But the wind is onshore and the break is a beach/jetty, so it’s going to be a washing machine. The forecast actually says it’s too big for this break. This is expert-only, and even then, it’s going to be a battle. The water is still warm, but the conditions are heavy.
By Wednesday the 9th and Thursday the 10th, the swell is still massive, 10ft and 8ft, with a very long 14-second period. The energy is extreme (3858 to 2884). The wind is cross-onshore, so it’s big, lumpy, and powerful. This is not a beginner’s game. The long period groundswell might offer some better shape at a reef or point, but at a beach/jetty, it’s going to break straight and close out. Still, for the experts, there’s serious power.
Now, here’s the standout. Look at Saturday the 12th of September. The swell drops to a much more manageable 5ft from the east-northeast with a 10-second period, and the wind goes glassy in the afternoon. The combined energy is a strong 728. The forecast says "expect very good surf conditions". This is the one to wait for. The water is still warm, and with clean conditions, this will be the best day on offer. It’s a solid chest-high wave, clean, and with the offshore wind, it’ll be a joy. The crowd factor is "sometimes", so you might have some company, but it’s worth it.
Sunday the 13th is a step down, with the wind turning onshore again and the swell dropping to 4ft.
So, to sum it up: the first week is small and messy, with a brief clean window on Tuesday the 1st. The second week starts huge and windy, only for the experts. But the real golden ticket is Saturday the 12th of September. Mark it in the calendar.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat morning. Warm (max 27°C on Mon afternoon, min 21°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Warm (max 29°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | E 12 | E 11 | E 11 | E 11 | E 12 | E 11 | ESE 14 | ESE 14 | ESE 12 | E 12 | E 12 | E 11 | E 10 | E 10 | SE 6 | E 12 | E 11 | E 10 | E 10 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
98 | 91 | 89 | 94 | 67 | 61 | 68 | 145 | 208 | 341 | 266 | 231 | 130 | 98 | 126 | 175 | 146 | 125 | 92 | 607 | 395 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross | cross-off | glassy | cross-on | glassy | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross |
High Tide | 5:47PM1.54m | 5:42AM1.60m | 6:06PM1.55m | 6:21AM1.55m | 6:26PM1.55m | 7:02AM1.47m | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | ||||||||
Low Tide | 11:29AM0.31m | 11:40PM0.54m | 11:57AM0.41m | 00:11AM0.46m | 12:23PM0.54m | 00:45AM0.42m | 12:48PM0.68m | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | ||||||||
5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | |
— | 6:10 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | |
mm | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | — | — | 17 |
Temp °C | 26 | 26 | 21 | 26 | 26 | 24 | 25 | 27 | 24 | 27 | 27 | 26 | 29 | 28 | 26 | 28 | 28 | 27 | 25 | 25 | 22 |
Feels °C | 31 | 30 | 21 | 29 | 30 | 27 | 28 | 30 | 26 | 31 | 31 | 31 | 32 | 31 | 30 | 30 | 30 | 30 | 26 | 24 | 21 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 11 | E 11 | ENE 6 | ENE 6 | E 6 | E 11 | ESE 14 | ESE 12 | E 12 | E 12 | E 11 | E 10 | ESE 6 | SE 6 | SE 6 | E 11 | SE 7 | E 10 | S 9 | E 9 |
98 | 91 | 89 | 40 | 38 | 41 | 59 | 145 | 208 | 341 | 266 | 231 | 130 | 44 | 126 | 85 | 146 | 100 | 92 | 63 | 61 | |
Swell 2 Height (m) Direction Period (s) | SW 6 | E 4 | SW 6 | E 11 | E 12 | E 11 | SE 9 | E 11 | E 11 | ENE 6 | E 7 | E 7 | E 7 | E 10 | E 10 | E 12 | S 8 | E 10 | SE 6 | SW 12 | SSW 11 |
16 | 10 | 18 | 94 | 67 | 61 | 31 | 57 | 61 | 40 | 66 | 60 | 43 | 98 | 94 | 175 | 33 | 125 | 41 | 71 | 103 | |
Swell 3 Height (m) Direction Period (s) | ENE 4 | SW 6 | SE 10 | SE 10 | SE 10 | SW 7 | ESE 14 | SE 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 10 | SSW 9 | SSW 9 | SW 11 | SSW 11 | S 10 | SE 9 | SSE 9 |
4 | 18 | 27 | 26 | 27 | 14 | 68 | 30 | 15 | 25 | 26 | 31 | 28 | 54 | 32 | 45 | 44 | 88 | 90 | 13 | 8 | |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | NE 5 | — | ENE 6 | — | E 6 | ENE 6 | ENE 6 | NNE 7 | — | — | — | ESE 6 | — | — | SE 6 | — | NE 5 | ENE 8 | ENE 8 |
40 | 56 | 43 | — | 64 | — | 29 | 48 | 55 | 25 | — | — | — | 82 | — | — | 88 | — | 63 | 607 | 395 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 0 | 6 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | 22 | 0 | 30 | 30 | 30 | 30 | 30 | 66 | 29 | 29 | 29 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











