Surf Forecasts:
Big Ben surf forecast from 6 Sep 2026:
- Best quality surf: Monday 7 Sep, 6PM (local time) - 10ft (3.0m), 9s period, S swell with cross-shore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 10ft (3.0m), 9s period, S swell with 1,677 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 6PM (local time) - 10ft (3.0m), 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 Monday (Sep 07) at 6PM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 1.3m and 8s. Another secondary swell of 0.1m and 18s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 3.0m 9s and forecast to arrive on Monday (Sep 07) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Wednesday (Sep 09) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Best Surf | 6PM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 3PM (Mon 7th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming up for Big Ben.
Alright, listen up. For the next few days, it’s gonna be a bit of a washout. We’ve got a lot of energy in the water, but the winds are just not playing ball. The water’s sitting at 83°, which is a touch warmer than normal for this time of year, so that’s a nice bonus if you’re just floating around.
The first real chance to get a clean wave in is looking like Thursday morning, September 10th. The swell is a manageable 5ft from the South with a 9-second period, but the real story is that light cross-offshore breeze. The combined swell energy is moderate, reading 534. It’s not going to be pumping, but it’ll be clean, and you’ll be able to find a few. After that, Thursday afternoon gets messy again.
Then we have a bit of a gap. The real standout is going to be a few days later, on Tuesday, September 15th. The morning has a clean 5ft easterly swell with a light cross-offshore breeze, giving you really nice conditions. The combined energy is solid at 927. But the absolute best of the whole period is going to be Tuesday afternoon, September 15th. The wind goes glassy, dead calm, with 4ft of E swell. That’s a dream session for a beach/jetty setup, especially if you’re learning. The wave energy is moderate at 498, but the lack of any wind makes it pure magic.
Don’t expect much on the weekend after that, but there’s another promising window. Thursday, September 17th is looking good. The morning is totally glassy with 2ft of long-period E swell, and the afternoon is clean with a cross-offshore breeze. The swell is small, but the conditions are ripe for a longboard.
After that, Friday, September 18th and Saturday, September 19th mornings both have glassy conditions with small, clean waves. The swell period drops to 6 seconds, so it’s weaker, short-period stuff, but on a glassy day, you can still have a blast.
Overall, don’t bother with the first week. Wait for the 15th or the 17th. Those are your best bets.
Rusty.
Short Range ForecastHeavy rain (total 156mm), heaviest during Sun afternoon. Warm (max 27°C on Mon morning, min 22°C on Sun morning). Winds decreasing (strong winds from the S on Mon afternoon, light winds from the SW by Tue morning). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed afternoon. Warm (max 28°C on Wed morning, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 7 | E 7 | ESE 8 | SE 8 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | E 14 | E 14 | E 14 | E 14 | ESE 14 | E 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 316 | 619 | 764 | 1301 | 1677 | 942 | 792 | 642 | 670 | 817 | 809 | 509 | 328 | 260 | 149 | 144 | 140 | 239 | 302 | 304 | 518 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | on | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross | glassy | cross | cross | cross | cross-on | cross |
High Tide | 3:59PM1.32m | 10:09PM1.26m | 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 | ||||||||
Low Tide | 8:43PM1.26m | 7:44AM0.44m | 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 | ||||||||
 |  |  |  | |  | | | | | | |  |  |  | | | | | | | |
 | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — |
 | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — |
mm | 6 | 53 | 62 | 13 | 7 | 4 | 2 | 3 | 6 | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 22 | 25 | 27 | 24 | 25 | 24 | 23 | 25 | 25 | 23 |
Feels °C | 21 | 22 | 27 | 27 | 26 | 27 | 30 | 31 | 29 | 30 | 29 | 23 | 26 | 29 | 27 | 30 | 27 | 25 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 9 | ESE 12 | S 10 | NE 8 | E 8 | S 9 | S 9 | S 9 | S 9 | E 9 | E 9 | S 9 | S 9 | S 8 | S 8 | S 7 | S 7 | E 14 | E 14 | ESE 14 | E 14 |
| kJ | 13 | 13 | 186 | 11 | 298 | 942 | 792 | 642 | 393 | 36 | 24 | 509 | 328 | 260 | 149 | 70 | 54 | 239 | 302 | 304 | 518 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SW 9 | NE 12 | — | E 18 | E 8 | E 9 | E 9 | SSW 10 | SE 10 | SE 10 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | S 7 | S 8 | SSW 8 | SSW 10 |
| kJ | 6 | 3 | 130 | — | 6 | 239 | 120 | 71 | 200 | 15 | 25 | 43 | 68 | 104 | 100 | 144 | 140 | 26 | 33 | 19 | 35 |
Swell 3 Height (m) Direction Period (s) | ENE 14 | E 15 | SW 10 | — | E 18 | SE 10 | SE 10 | SE 10 | E 9 | E 17 | E 16 | ESE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | S 9 | S 12 | S 11 | SSW 7 |
| kJ | 19 | 4 | 4 | — | 6 | 26 | 26 | 27 | 56 | 52 | 46 | 12 | 29 | 28 | 16 | 14 | 24 | 6 | 3 | 10 | 10 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | ESE 8 | SE 8 | S 9 | — | — | — | S 9 | S 9 | S 9 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | ENE 6 | NE 4 | ENE 5 | ENE 5 |
| kJ | 316 | 619 | 764 | 1301 | 1677 | — | — | — | 670 | 817 | 809 | 169 | 109 | 68 | 29 | 30 | 26 | 22 | 18 | 24 | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 532 | 513 | 595 | 532 | 177 | 70 | 35 | 30 | 62 | 70 | 35 | 83 | 0 | 70 | 6 | 0 | 11 | 6 | 6 | 35 | 6 |
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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