Surf Forecasts:
Big Ben surf forecast from 15 Sep 2026:
- Best quality surf: Saturday 19 Sep, 12AM (local time) - 10ft (3.0m), 14s period, SE swell with cross-offshore winds.
- Most powerful swell: Tuesday 22 Sep, 12PM (local time) - 13ft (4.0m), 14s period, S swell with 7,375 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 9PM (local time) - 3.5ft (1.0m), 14s 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 Tuesday (Sep 15) at 9PM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 1.3m and 6s. 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 4.0m 14s and forecast to arrive on Tuesday (Sep 22) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Sunday (Sep 20) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 15th Sep) | 3.5ft (1.0m) 14s |
| Best Surf | 12AM (Sat 19th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 12PM (Tue 22nd Sep) | 13ft (4.0m) 14s |
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’s got cookin’ for us over the next couple of weeks. Gotta be honest, the start is a bit of a slow burner, but there’s some serious potential further out if you’ve got patience.
The opening stretch is pretty grim. Tuesday the 15th through to the end of that first week is a write-off for any decent waves. The swell energy is moderate at best, and the wind and weather are messy. You’re looking at a solid six-day gap with nothing worth paddling out for. Don’t even bother checking the cam.
We finally get a spark of life on Saturday the 19th. The swell is pumping up to 10ft out of the SE, with a long period of 13 seconds. That’s proper groundswell energy, and the combined energy is strong (3019). But here’s the catch – that size, and with the cross-offshore wind, it’s just too big for this break. The experts might look at it, but for the average surfer, it’s a no-go.
The real standout, and I mean the one to circle on the calendar, is the morning of Sunday the 27th of September. We’ve got clean 4ft of SSE swell, a solid 12-second period, and the wind is glassy. Absolutely dead flat water. The combined energy is moderate (636), but that clean, glassy surface on a southeast swell at Big Ben is about as good as it gets. This is your window for a proper, clean session without the crowds being too much of a hassle.
The last few days of the month look promising for the experienced crew. Tuesday the 29th afternoon has 5ft of SSW swell with a very long 15-second period, and light offshore winds. That’s a gorgeous, powerful groundswell, perfect for lining up. The combined energy is strong (1256), but with that long period, the sets will be spaced out, giving you plenty of time to paddle back out.
Summary: Save your energy for the last weekend of September. The Sunday morning glass-off is the pick of the bunch for clean, fun waves. If you’re a seasoned local, the Tuesday afternoon session later in the month has some real grunt.
Rusty.
Short Range ForecastHeavy rain (total 57mm), heaviest during Tue morning. Warm (max 26°C on Tue afternoon, min 18°C on Thu night). Winds increasing (light winds from the SW on Tue afternoon, fresh winds from the NE by Thu morning). | Days 4-6 Weather SummaryHeavy rain (total 38mm), heaviest during Sun morning. Warm (max 21°C on Fri afternoon, min 19°C on Fri morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 14 | E 14 | E 13 | E 13 | E 13 | ENE 7 | NE 7 | NE 8 | NE 8 | ENE 9 | ENE 9 | SE 14 | SE 13 | SE 12 | SE 11 | SE 11 | SSE 12 | S 12 | S 13 | S 13 | S 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 383 | 411 | 345 | 276 | 206 | 142 | 456 | 682 | 585 | 909 | 845 | 3094 | 2561 | 2221 | 2204 | 1430 | 1100 | 1167 | 1430 | 1890 | 2221 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 6:10PM1.56m | 7:20AM1.42m | 6:29PM1.55m | 8:11AM1.30m | 6:50PM1.51m | 9:25AM1.19m | 7:10PM1.46m | 7:26PM1.38m | 4:03PM1.29m | 3:16PM1.36m | 00:16AM1.22m | ||||||||||
Low Tide | 12:20PM0.71m | 00:48AM0.32m | 12:42PM0.84m | 1:26AM0.34m | 1:01PM0.96m | 2:13AM0.40m | 1:11PM1.08m | 3:15AM0.48m | 4:55AM0.53m | 6:47AM0.51m | 8:41PM1.15m | ||||||||||
 | |  |  | |  |  | |  |  | | | | | |  | |  | | |  | |
 | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — | — | 5:42 | — | — | 5:39 | — | — | 5:38 | — |
mm | 11 | 3 | 7 | 8 | 8 | 20 | — | — | — | — | — | — | — | 10 | 14 | 14 | — | — | — | — | 2 |
Temp °C | 25 | 26 | 24 | 22 | 22 | 22 | 20 | 20 | 19 | 20 | 21 | 19 | 20 | 20 | 21 | 20 | 21 | 21 | 24 | 24 | 23 |
Feels °C | 27 | 29 | 28 | 24 | 23 | 24 | 15 | 16 | 15 | 16 | 17 | 15 | 17 | 17 | 21 | 18 | 21 | 21 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 7 | SSE 6 | SSE 7 | E 13 | SE 8 | E 12 | SE 8 | E 12 | SSE 18 | SE 16 | SE 14 | SE 13 | SE 12 | SE 11 | SE 11 | SSE 12 | S 12 | S 13 | S 13 | S 13 |
| kJ | 113 | 140 | 107 | 78 | 206 | 63 | 71 | 9 | 72 | 31 | 719 | 3094 | 2561 | 2221 | 2204 | 1430 | 1100 | 1167 | 1430 | 1890 | 2221 |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | E 13 | E 13 | SE 7 | E 12 | SE 8 | SSE 9 | SSE 9 | SE 12 | SE 11 | — | — | E 10 | E 9 | S 13 | ESE 10 | ESE 9 | ENE 11 | SE 9 | E 10 |
| kJ | 383 | 411 | 345 | 276 | 62 | 141 | 20 | 8 | 8 | 6 | 18 | — | — | 52 | 110 | 434 | 678 | 626 | 452 | 95 | 267 |
Swell 3 Height (m) Direction Period (s) | S 7 | NE 10 | SW 6 | SSW 6 | SE 8 | E 16 | ENE 14 | SSE 9 | SSE 9 | SE 9 | — | — | — | — | E 15 | E 14 | E 13 | E 12 | SE 9 | E 15 | SE 8 |
| kJ | 1 | 4 | 43 | 12 | 3 | 5 | 40 | 8 | 8 | 3 | — | — | — | — | 4 | 15 | 53 | 98 | 179 | 4 | 34 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 6 | NE 5 | NE 6 | ENE 7 | NE 7 | NE 8 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | NE 8 | NE 8 | NE 5 | NE 5 | NE 8 | — | ENE 10 | — |
| kJ | — | — | 70 | 21 | 67 | 142 | 456 | 682 | 585 | 909 | 845 | 608 | 458 | 306 | 171 | 67 | 48 | 10 | — | 386 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 30 | 0 | 35 | 35 | 0 | 184 | 595 | 513 | 530 | 184 | 513 | 273 | 595 | 532 | 273 | 184 | 29 | 29 | 609 | 0 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big Ben surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest