Surf Forecasts:
Big Ben surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 19 Sep, 6AM (local time) - 10ft (3.0m), 14s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 6AM (local time) - 10ft (3.0m), 14s period, SE swell with 3,186 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 9AM (local time) - 3ft (0.9m), 13s 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 Sunday (Sep 13) at 9AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.6m and 6s. Another secondary swell of 0.7m and 6s is also forecast. 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 3.0m 14s and forecast to arrive on Saturday (Sep 19) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Sep 16) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 13th Sep) | 3ft (0.9m) 13s |
| Best Surf | 6AM (Sat 19th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 6AM (Sat 19th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya. Let's have a look at what Big Ben has cookin' for us over the next couple of weeks or so.
Straight up, the next few days are a bit of a slow burn. We’ve got some small, clean waves on the Sunday morning and Wednesday, but the real juice doesn’t start to show until we get into the back half of the window. This spot is a beach and jetty setup that’s pretty exposed, and it's about as beginner-friendly as it gets, but it does have a reputation for being a bit hit-and-miss with consistency. Still, the water is sittin' at a warm 80°, which is about dead on normal for this time of year, so you can leave the steamer at home.
Now, the standout window here is looking like the weekend of September 19th and 20th. We’ve got a serious pulse of swell coming in from the southeast, hitting around 10ft. The wind is looking light and clean, comin' off the land, which should make for some super tidy faces. The energy in the water is massive, with combined readings around 2600 to 3300. Real talk though, that size is pushing past the friendly zone. For a beginner spot, 10ft is a lot of ocean. That’s expert territory, so if you’re still getting your sea legs, give that one a miss and let the big dogs have it.
If that's too gnarly, the couple of days after, like Monday the 21st and Tuesday the 22nd, still have some solid lump in the 7ft to 10ft range, but the wind gets messy and onshore, making things choppy and pretty average. Not the one for a clean session.
Further out, around September 28th, there’s another big pulse forecast, with a long-period groundswell from the SSW pushin' 10ft and a period of 17 seconds. That’s a very long period, and the energy reading is through the roof at 6636. While that makes for incredible, powerful lines at the right reef or point, at a beachy like this, that kind of period can make the waves heave up and close out. Plus, it’s another one that's only for the experts.
So, to wrap it up, if you’re an experienced surfer, the 19th and 20th are your prime targets – just be ready for some serious size. For everyone else, the little knee-high sessions early on are your best bet.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Tue morning. Warm (max 27°C on Mon morning, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Wed morning. Warm (max 23°C on Wed morning, min 17°C on Fri morning). Winds increasing (light winds from the NNE on Wed morning, fresh winds from the N by Fri morning). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 13 | E 13 | E 12 | E 12 | SSE 10 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | SE 15 | SE 13 | SE 12 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 272 | 276 | 239 | 233 | 193 | 388 | 383 | 496 | 345 | 340 | 255 | 184 | 203 | 330 | 514 | 596 | 688 | 2372 | 3020 | 2375 | 1829 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 5:30PM1.56m | 5:58AM1.59m | 5:50PM1.57m | 6:37AM1.52m | 6:10PM1.56m | 7:20AM1.42m | 6:29PM1.55m | 8:11AM1.30m | 6:50PM1.51m | 9:25AM1.19m | 7:10PM1.46m | 7:26PM1.38m | |||||||||
Low Tide | 11:29AM0.47m | 11:41PM0.39m | 11:55AM0.58m | 00:13AM0.33m | 12:20PM0.71m | 00:48AM0.32m | 12:42PM0.84m | 1:26AM0.34m | 1:01PM0.96m | 2:13AM0.40m | 1:11PM1.08m | 3:15AM0.48m | |||||||||
 |  |  | | |  |  | |  | |  |  | |  | | | | | | |  | |
 | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — |
 | — | 5:50 | — | — | 5:49 | — | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — | — | 5:42 | — |
mm | — | — | — | — | — | 3 | 4 | 1 | 5 | 16 | 4 | — | — | — | 1 | — | — | — | 1 | 4 | 42 |
Temp °C | 25 | 25 | 25 | 27 | 27 | 25 | 25 | 26 | 25 | 23 | 23 | 22 | 22 | 22 | 20 | 19 | 17 | 20 | 22 | 23 | 22 |
Feels °C | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 28 | 30 | 25 | 25 | 23 | 21 | 20 | 17 | 14 | 12 | 19 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | E 12 | E 12 | SSE 9 | E 14 | E 14 | SSE 7 | E 13 | E 13 | E 12 | E 12 | E 11 | E 11 | ENE 12 | SE 18 | SE 15 | SE 13 | SE 12 | SE 11 |
| kJ | 272 | 276 | 239 | 233 | 193 | 221 | 383 | 496 | 123 | 340 | 255 | 184 | 101 | 93 | 66 | 29 | 630 | 2372 | 3020 | 2375 | 1829 |
Swell 2 Height (m) Direction Period (s) | ENE 6 | SE 8 | SE 7 | SSE 10 | ENE 15 | E 14 | SE 8 | SE 8 | E 13 | SSE 7 | SE 7 | SE 8 | E 14 | SSE 9 | SSE 9 | SE 20 | SE 8 | E 11 | — | ENE 10 | S 15 |
| kJ | 25 | 55 | 44 | 117 | 78 | 388 | 116 | 96 | 345 | 90 | 65 | 49 | 37 | 8 | 7 | 15 | 23 | 59 | — | 255 | 38 |
Swell 3 Height (m) Direction Period (s) | SE 9 | ENE 6 | NE 6 | E 16 | ENE 7 | ENE 6 | S 7 | NE 10 | S 9 | SSW 5 | SE 8 | E 16 | SSE 9 | ENE 13 | — | SSE 8 | — | ESE 9 | — | — | — |
| kJ | 40 | 15 | 10 | 45 | 10 | 4 | 1 | 4 | 2 | 17 | 3 | 20 | 8 | 17 | — | 7 | — | 266 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 6 | — | — | SW 7 | SSE 10 | SW 4 | — | SE 8 | — | NE 4 | NE 5 | NE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 10 | — | — |
| kJ | 36 | — | — | 2 | 183 | 16 | — | 143 | — | 12 | 29 | 91 | 203 | 330 | 514 | 596 | 688 | 345 | 318 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 30 | 30 | 121 | 561 | 90 | 39 | 35 | 6 | 0 | 0 | 35 | 184 | 184 | 273 | 273 | 513 | 273 | 530 | 66 | 29 |
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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