Surf Forecasts:
Big Ben surf forecast from 7 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 12AM (local time) - 8ft (2.4m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 9PM (local time) - 8ft (2.5m), 9s period, S swell with 1,190 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 12AM (local time) - 8ft (2.4m), 9s period with S 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 (Sep 08) at 12AM. The primary swell is predicted to be 2.4m and 9s period with a secondary swell of 0.9m and 8s. 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 2.5m 9s and forecast to arrive on Monday (Sep 07) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 8th Sep) | 8ft (2.4m) 9s |
| Best Surf | 12AM (Tue 8th Sep) | 8ft (2.4m) 9s |
| Most Powerful | 9PM (Mon 7th Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cookin’ out there.
Right off the bat, I gotta be straight with you – the next few days are a mixed bag at Big Ben. We’ve got some solid swell energy, but it’s gonna take a bit of patience to find the clean windows. The water temp is sitting at a warm 83°, which is a touch warmer than normal for this time of year, so a spring suit or just a rashie will do ya fine.
The first real standout is actually Tuesday morning, September 8th. We’ve got a 6ft south swell rolling in with a 9-second period, and the wind is light and cross-offshore. The energy is moderate, and the report says it’ll be clean. That’s your best early call for a fun, uncrowded session if you can sneak out.
We’ve got a big gap after that. Swell drops off, and the wind gets messy or too light through the week. There’s a tiny pulse of long-period east groundswell on the 11th and 12th, but it’s only 2ft to 3ft. Saturday morning, September 12th, it goes glassy with a 3ft east swell at a very long 14 seconds – that could be a fun little longboard or fish morning at Big Ben (beach/jetty), but it’s weak energy, so don’t expect much push.
Now, the real beast is brewing for the second week. Tuesday, September 22nd, is the one to circle on the calendar. We’ve got a massive 10ft to 12ft southeast groundswell with a very long 18-second period. The combined energy is off the charts. The wind is offshore on Tuesday morning – clean and mean. But listen, that’s big. Over 8ft, this is expert territory only. The report even says it’s too big for this break. If you’re a solid charger, there might be some freight train walls, but for most of us, it’s a day to watch from the sand or bring the kites. Given the size and the strong offshore, that setup actually looks more interesting for kite surfing than paddle surfing.
No other real standouts in the second week – the wind stays strong and the swell pulses are all macking or messy. So if you’re a beginner, forget the 22nd. Stick to that Tuesday morning, the 8th, for the cleanest chest-high runners.
Rusty, signing off.
Short Range ForecastHeavy rain (total 34mm), heaviest during Thu morning. Warm (max 29°C on Tue afternoon, min 21°C on Thu morning). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 27°C on Sun morning, min 20°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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) | S 9 | S 9 | S 9 | S 9 | S 9 | SSW 8 | SSW 8 | S 8 | S 8 | S 8 | S 8 | E 14 | E 14 | E 14 | E 14 | ESE 13 | ESE 13 | E 13 | E 13 | E 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2129 | 942 | 580 | 461 | 516 | 686 | 782 | 472 | 351 | 219 | 124 | 144 | 140 | 183 | 239 | 299 | 295 | 272 | 273 | 187 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross | cross | cross | glassy | cross-off | cross-off | cross-off | cross | cross | cross-off | glassy | cross-on | cross | on | on | cross-on |
High Tide | 3:49PM1.38m | 1:09AM1.28m | 4:00PM1.44m | 2:25AM1.38m | 4:17PM1.48m | 3:18AM1.48m | 4:35PM1.51m | 4:02AM1.57m | 4:53PM1.53m | 4:42AM1.62m | 5:12PM1.55m | 5:20AM1.63m | 5:30PM1.56m | |||||||
Low Tide | 8:59PM1.14m | 8:40AM0.37m | 9:23PM1.01m | 9:23AM0.31m | 9:48PM0.87m | 9:59AM0.30m | 10:15PM0.72m | 10:31AM0.32m | 10:42PM0.59m | 11:01AM0.38m | 11:11PM0.48m | 11:29AM0.47m | 11:41PM0.39m | |||||||
 |  |  | | | |  | |  |  |  |  | |  | | |  | | | | |
 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — |
 | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — |
mm | 8 | 6 | — | 2 | 5 | 1 | — | 3 | 9 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 28 | 29 | 27 | 29 | 29 | 27 | 21 | 21 | 20 | 22 | 23 | 22 | 25 | 25 | 24 | 27 | 28 | 26 |
Feels °C | 27 | 29 | 31 | 33 | 29 | 29 | 29 | 30 | 21 | 20 | 19 | 24 | 26 | 26 | 29 | 29 | 28 | 30 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | E 8 | S 9 | S 9 | S 9 | E 9 | E 9 | ESE 10 | S 8 | S 8 | S 8 | S 8 | ENE 7 | S 8 | E 14 | E 14 | ESE 13 | ESE 13 | E 13 | E 13 | SE 8 |
| kJ | 133 | 942 | 580 | 461 | 36 | 25 | 31 | 472 | 351 | 219 | 124 | 59 | 55 | 183 | 239 | 299 | 295 | 272 | 273 | 95 |
Swell 2 Height (m) Direction Period (s) | NE 11 | E 8 | E 9 | E 9 | SE 10 | SE 10 | E 16 | NE 8 | E 15 | E 15 | E 14 | S 8 | E 14 | S 7 | S 7 | S 7 | NE 6 | SE 9 | SE 8 | E 12 |
| kJ | 5 | 112 | 73 | 76 | 24 | 24 | 46 | 38 | 68 | 67 | 100 | 74 | 140 | 40 | 27 | 26 | 12 | 49 | 68 | 187 |
Swell 3 Height (m) Direction Period (s) | E 18 | SE 10 | SE 10 | SE 10 | NNE 8 | E 17 | NE 9 | ESE 11 | SE 11 | SE 10 | SE 10 | E 14 | ENE 6 | SE 10 | NE 6 | NE 6 | SSW 7 | NE 5 | NE 6 | ENE 6 |
| kJ | 6 | 27 | 26 | 27 | 7 | 52 | 3 | 38 | 29 | 26 | 24 | 144 | 26 | 24 | 18 | 17 | 9 | 5 | 5 | 3 |
Wind waves Height (m) Direction Period (s) | S 9 | — | — | — | S 9 | SSW 8 | SSW 8 | NE 7 | NE 6 | NE 6 | NE 7 | NE 7 | — | NE 6 | — | — | — | — | — | — |
| kJ | 2129 | — | — | — | 516 | 686 | 782 | 160 | 96 | 66 | 116 | 102 | — | 30 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 57 | 0 | 0 | 30 | 70 | 513 | 513 | 0 | 6 | 63 | 0 | 6 | 6 | 0 | 0 | 22 | 6 | 30 | 30 | 30 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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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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