
Surf Forecasts:
Big Ben surf forecast from 13 Sep 2026:
- Best quality surf: Saturday 19 Sep, 12AM (local time) - 10ft (3.0m), 15s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 3AM (local time) - 10ft (3.0m), 14s period, SE swell with 3,594 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 3AM (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 3AM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 1.1m and 9s. Another secondary swell of 0.7m and 4s 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 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Wednesday (Sep 16) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 15th Sep) | 3.5ft (1.0m) 14s |
| Best Surf | 12AM (Sat 19th Sep) | 10ft (3.0m) 15s |
| Most Powerful | 3AM (Sat 19th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Right, let's have a look at what's cookin' at Big Ben. It's a bit of a mixed bag, so don't get your hopes up too early.
The water temp's sittin' at 80°, which is pretty much normal for this time of year, so no surprises there.
We're looking at a slow start, a real slow start. The first week is honestly a write-off. The whole week from Monday the 14th through to Friday the 18th is a total no-go. The swell is either tiny, the wind is a mess, or it's just all over the shop. You've got short-period, weak energy, and mostly cross-shore winds. Not worth paddling out for.
Saturday the 19th sees a big change, but not a good one for most of us. A solid 10ft swell rolls in from the SE, and the energy is pumping (3468). But that's way too much juice for a spot like this. It's an exposed beach/jetty setup, and that kind of size is for the experts only, and even then, the data says it's too big for the break. Sunday the 20th morning is the same story – 10ft of SE swell (4811 energy) is just a wall of water.
Now, Sunday afternoon the 20th and Monday the 21st, that's where we start to see the light. The swell drops to a much more manageable 7ft, swings around to the S, and the energy is still strong (2303). The wind goes light cross-offshore, which should keep things clean. This is excellent for experienced surfers. The period is a long 13 seconds, so that's proper groundswell energy coming through. At a beach/jetty, a long period S swell can sometimes straighten out, but if it's hitting the bank right, it'll have some punch.
Tuesday the 22nd is a full-blown cyclone warning. We're talking a 16ft swell with gale-force onshore winds. Stay well clear.
Things settle down a touch after that, but the quality is gone. From Wednesday the 23rd to Saturday the 26th it's back to poor to marginal conditions with messy wind and small, weak swell.
Then we get another little window. Sunday the 27th shows some promise with a 5ft S swell (1391 energy) and clean cross-off wind, but it's still just marginal. The real standout of the whole run looks like Monday the 28th. A solid 6ft to 7ft S groundswell (2226-2500 energy) with a very long 16-second period. The wind is light and cross-offshore. That's a recipe for some clean, powerful lines for the more experienced crew. Just be aware, that long period can be tricky at the beach.
Tuesday the 29th, we're back to the 10ft range, which is too big again.
So, if you're an experienced surfer, circle Sunday the 20th afternoon and Monday the 21st for the first standout, and then definitely keep your eye on Monday the 28th. That last one is a long-range call, so don't book the week off just yet, but it's looking like the best of the whole run. For everyone else, it's a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 42mm), heaviest during Tue afternoon. Warm (max 27°C on Mon morning, min 21°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Sat night. Warm (max 23°C on Sat morning, min 19°C on Thu night). Winds decreasing (fresh winds from the NNE on Thu night, light winds from the ENE by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 12 | SSE 10 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | ENE 12 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | SE 15 | SE 15 | SE 13 | SE 13 | SE 12 | SE 13 | S 13 | S 12 |
Wave Graph | |||||||||||||||||||||
233 | 218 | 384 | 383 | 496 | 345 | 276 | 255 | 192 | 211 | 372 | 519 | 654 | 1169 | 3580 | 3020 | 3020 | 2693 | 3135 | 1535 | 1486 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-off | cross-off |
High Tide | 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 | 4:03PM1.29m | ||||||||||
Low Tide | 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 | 4:55AM0.53m | ||||||||||
5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | |
— | 5:49 | — | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — | — | 5:42 | — | — | 5:39 | — | |
mm | — | — | 3 | 5 | 15 | 4 | 7 | 3 | 5 | — | — | — | — | — | — | 2 | 1 | 21 | — | — | — |
Temp °C | 27 | 27 | 26 | 24 | 24 | 24 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 23 | 22 | 22 | 23 | 23 | 22 |
Feels °C | 28 | 28 | 28 | 26 | 28 | 29 | 23 | 22 | 23 | 20 | 20 | 18 | 18 | 19 | 20 | 25 | 24 | 25 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 12 | SSE 9 | E 14 | E 14 | E 13 | SE 7 | E 13 | ENE 12 | E 12 | E 11 | E 12 | SE 16 | SE 15 | SE 15 | SE 13 | SE 13 | SE 12 | SE 13 | S 13 | S 12 |
233 | 193 | 203 | 383 | 496 | 345 | 102 | 255 | 192 | 71 | 91 | 73 | 167 | 1169 | 3580 | 3020 | 3020 | 2693 | 3135 | 1535 | 1486 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | ENE 15 | E 14 | ENE 7 | SE 8 | SSE 7 | E 13 | SE 8 | SE 8 | SE 7 | SE 7 | SSE 9 | ENE 12 | E 11 | E 11 | E 10 | ENE 10 | NE 8 | SSE 13 | ESE 10 | ESE 9 |
94 | 78 | 384 | 10 | 128 | 91 | 276 | 84 | 63 | 19 | 14 | 7 | 29 | 62 | 83 | 158 | 172 | 41 | 1661 | 732 | 528 | |
Swell 3 Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 6 | ENE 7 | NE 10 | — | SSW 5 | SE 8 | E 16 | ENE 14 | SSE 8 | S 18 | SE 8 | SSE 8 | — | — | — | — | E 14 | E 13 | E 12 |
8 | 10 | 4 | 5 | 4 | — | 18 | 3 | 5 | 40 | 6 | 6 | 3 | 7 | — | — | — | — | 15 | 28 | 67 | |
Wind waves Height (m) Direction Period (s) | SW 7 | SSE 10 | — | SSE 8 | SW 4 | — | NE 4 | NE 5 | NE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 10 | NE 8 | — | — | NE 7 | — |
2 | 218 | — | 142 | 21 | — | 10 | 49 | 52 | 211 | 372 | 519 | 654 | 503 | 213 | 290 | 128 | — | — | 8 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 121 | 183 | 35 | 39 | 24 | 0 | 29 | 35 | 184 | 184 | 595 | 595 | 273 | 513 | 609 | 35 | 35 | 49 | 22 | 0 | 0 |
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.










