Surf Forecasts:
Big Ben surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 6PM (local time) - 10ft (3.0m), 11s period, SSE swell with cross-shore winds.
- Most powerful swell: Tuesday 8 Sep, 9PM (local time) - 11ft (3.5m), 12s period, SSE swell with 3,679 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 9AM (local time) - 4ft (1.2m), 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 Wednesday (Sep 02) at 9AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.4m and 8s. 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 3.5m 12s and forecast to arrive on Tuesday (Sep 08) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Friday (Sep 04) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 2nd Sep) | 4ft (1.2m) 10s |
| Best Surf | 6PM (Tue 8th Sep) | 10ft (3.0m) 11s |
| Most Powerful | 9PM (Tue 8th Sep) | 11ft (3.5m) 12s |
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 Big Ben is serving up over the next couple of weeks.
Overall, it’s a bit of a frustrating start. The first few days are pretty flat or blown out, nothing to get excited about. There’s a big pulse of energy coming through around the middle of the second week, but the size is going to be an issue, especially for a spot that is exposed and inconsistent like this one. The real standout is a window on the 9th, with a massive groundswell and perfect conditions, but only for the brave.
First up, the forecast really kicks off on Tuesday the 2nd, with a small bump of 4ft easterly swell coming in on Wednesday morning. The wind is glassy, which is a major positive and the water temp is a warm 81°F, about normal for this time of year. The combined energy is moderate at 334. This is a rare moment of clean conditions, and for a break that is inconsistent, you have to take the windows when they come. It’s a good size for a beginner, but don’t expect much push.
Things get messy again from Thursday onward with a mix of southerly winds and onshore junk. On Friday the 4th, the wind is cross-off and the afternoon picks up to 5ft, but the period drops to a weak 8 seconds, making for crumbly, short-period waves. The combined energy sits at 406 and it’s still moderate, but the quality just isn’t there.
The weekend brings a bit more size, with 7ft to 7ft easterly swell on Sunday the 6th, but it’s accompanied by strong, onshore winds from the NE and fresh breezes. This is likely to be a messy, wind-affected mess. You’d need to be a masochist to paddle out.
Now, the big news is the massive pulse starting from the 8th and peaking on the 9th. This is a strong southerly groundswell with a period of 11 seconds. On Wednesday the 9th, we see 10ft of SSE swell with glassy winds in the morning. The combined energy is reading 2205 – that’s strong, serious wave energy. However, the forecast is clear: the swell is predicted to be too big for this break. At 10ft, this is firmly in expert-only territory. This break is a beach/jetty setup, and with a long-period groundswell like this (11 seconds), it might well close out or be a washing machine, especially for a beach break. The glassy wind means it’ll be pretty to look at, but don’t even think about it unless you’ve got a lot of experience and a bigger board.
After that peak, the swell backs down but remains solid through the second week. The period actually lengthens out to 15–17 seconds from the east from the 14th, which is a very long period groundswell. This means the sets will be powerful and spaced out, but at a point break or reef this would be magic; for a beach break like Big Ben, it might just break too straight and shut down. The combined energies are still high (up to 2018), but the winds are mostly cross or cross-onshore, which won’t help the shape. These are marginal days for the 14th, 15th, and 16th, with the morning of the 15th offering some swell but moderate cross-shore wind. For an inconsistent break, you’d need a lot of patience.
Honestly, if you’re just looking to get wet, the best bet is the small, clean, glassy window on Wednesday morning, the 2nd. It’s not a standout by power, but the conditions will be nice. For the real daredevils, that Wednesday the 9th is a rare beast, but it’s a beast that will eat you up if you’re not ready. If you’re after a decent paddle with some grunt, the morning of the 15th September has potential but it’s a long-range call and not certain.
Keep an eye on the forecasts, though – things can change. For now, don’t get your hopes up too high for clean, rideable waves. There are long gaps of nothing, so temper your expectations.
Rusty.
Short Range ForecastHeavy rain (total 132mm), heaviest during Thu night. Warm (max 29°C on Wed morning, min 21°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 222mm), heaviest during Sun night. Warm (max 25°C on Mon morning, min 19°C on Fri night). Winds increasing (light winds from the NNE on Fri afternoon, fresh winds from the NE by Sun morning). | |||||||||||||||||||
Tue 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | E 10 | SE 7 | SSW 8 | SSW 9 | SSW 9 | E 6 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | S 12 |
Wave Graph | ||||||||||||||||||||
295 | 394 | 294 | 233 | 282 | 125 | 94 | 97 | 173 | 293 | 222 | 113 | 184 | 352 | 475 | 567 | 337 | 382 | 349 | 1111 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | on | on |
High Tide | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | 8:08PM1.35m | 3:59PM1.32m | 10:09PM1.26m | 3:49PM1.38m | 1:09AM1.28m | ||||||||
Low Tide | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | 4:21AM0.52m | 6:15AM0.51m | 8:43PM1.26m | 7:44AM0.44m | 8:59PM1.14m | |||||||||
— | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | |
6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 5:59 | — | |
mm | — | — | — | — | — | 6 | 3 | 89 | 34 | 9 | 18 | 14 | 39 | 21 | 4 | 23 | 73 | 21 | 49 | 23 |
Temp °C | 27 | 25 | 29 | 28 | 26 | 27 | 27 | 24 | 22 | 21 | 20 | 19 | 20 | 21 | 22 | 22 | 23 | 25 | 25 | 27 |
Feels °C | 29 | 27 | 32 | 30 | 30 | 30 | 31 | 28 | 22 | 22 | 21 | 15 | 18 | 20 | 18 | 20 | 22 | 26 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SE 6 | SE 7 | SSW 8 | SSW 9 | SSW 9 | S 8 | SW 9 | SW 9 | SW 9 | E 8 | E 8 | E 8 | S 12 |
295 | 394 | 294 | 233 | 282 | 125 | 94 | 60 | 167 | 293 | 222 | 113 | 46 | 42 | 30 | 22 | 337 | 382 | 349 | 1111 | |
Swell 2 Height (m) Direction Period (s) | ENE 7 | SSW 8 | SSW 8 | E 13 | S 9 | S 9 | S 8 | E 10 | SSW 10 | SE 7 | SE 7 | SE 7 | SW 9 | S 8 | SE 12 | E 12 | NE 9 | SSE 7 | S 9 | ENE 8 |
61 | 14 | 24 | 83 | 38 | 71 | 52 | 92 | 173 | 91 | 52 | 38 | 29 | 10 | 6 | 11 | 28 | 29 | 169 | 238 | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SE 10 | SE 10 | SSW 8 | SE 9 | E 7 | SE 6 | SSW 11 | E 9 | NE 5 | ENE 6 | E 9 | ENE 13 | WSW 11 | SE 14 | SE 15 | SW 9 | SE 11 | S 12 | SE 10 |
14 | 15 | 16 | 28 | 22 | 23 | 22 | 97 | 60 | 22 | 20 | 39 | 17 | 12 | 8 | 8 | 23 | 19 | 103 | 26 | |
Wind waves Height (m) Direction Period (s) | — | ENE 7 | — | — | SSE 3 | — | — | N 2 | N 4 | NNE 5 | — | ENE 5 | E 6 | E 7 | E 7 | E 8 | — | NE 8 | — | ENE 8 |
— | 59 | — | — | 1 | — | — | 1 | 17 | 51 | — | 84 | 184 | 352 | 475 | 567 | — | 126 | — | 381 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 29 | 35 | 0 | 30 | 30 | 30 | 30 | 0 | 6 | 0 | 24 | 273 | 273 | 530 | 595 | 513 | 513 | 595 | 595 | 532 |
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.











