Surf Forecasts:
Big Ben surf forecast from 5 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 12AM (local time) - 10ft (3.0m), 10s period, S swell with cross-shore winds.
- Most powerful swell: Monday 7 Sep, 9PM (local time) - 11ft (3.5m), 10s period, S swell with 2,631 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 12AM (local time) - 10ft (3.0m), 10s 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 3.0m and 10s period with a secondary swell of 1.2m and 8s. Another secondary swell of 0.1m and 11s 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 3.5m 10s and forecast to arrive on Monday (Sep 07) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Thursday (Sep 10) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 8th Sep) | 10ft (3.0m) 10s |
| Best Surf | 12AM (Tue 8th Sep) | 10ft (3.0m) 10s |
| Most Powerful | 9PM (Mon 7th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here.
We’ve got a bit of a wait on our hands. The surf this week is a write-off thanks to some wild weather, but there’s a real gem hiding in the second week if you’ve got the patience. The first few days are a mess of strong winds and lumpy, stormy conditions. You’ll want to sit this one out until things settle.
The first real chance to get wet comes on Tuesday, September 8th. Early morning at Big Ben is looking like the standout of the whole forecast. The swell is a solid 7ft coming from the south with a 9-second period, pushing moderate wave energy (1013). The winner here is the wind—a light WSW cross-offshore breeze keeping things clean. This is for experienced surfers only; that size will be too much for beginners. The afternoon glass-off is hard to ignore, too, with a 6ft south swell going glassy and calm. Water temp is about average for the time of year, nothing weird going on.
Wednesday the 9th turns messy again with cross-shore winds and a cross-chop, so don’t bother. Thursday the 10th has some cleaner, smaller waves, but it’s nothing to get excited about—3ft to 4ft, clean, but weak.
Now, here’s where it gets interesting. Friday the 11th and Saturday the 12th bring in a very long-period groundswell from the east, 14 seconds, but the height is tiny—only 2ft to 3ft. That’s a lot of energy (around 300) but it’s barely breaking. For a beach/jetty setup like Big Ben, that long period can make it break too straight and be a bit wonky. Worth a look if you’re a patient soul on a log, but it’s not a standout.
Sunday, September 13th is the next date to circle. The morning session has a 3ft east swell, clean and light offshore wind, and very good conditions. Energy is climbing up to 523, which is solid for the size. It’s a bit inconsistent here, so don’t expect non-stop action, but when they come through, they’ll be clean.
The rest of the second week fades fast. Swell drops off, winds get messy again, and by the 18th and 19th we’re looking at tiny, choppy junk. A bit of a bump on the 20th, but the wind is onshore and it’s a short-period windswell—no good.
Overall, if you’re itching for a paddle, Tuesday morning the 8th is the pick of the whole run. The water is about average temp, the wind is right, and the swell is solid. Just know your limits. The long-range stuff is promising but far from certain.
Stay stoked,
Rusty
Short Range ForecastHeavy rain (total 153mm), heaviest during Sun night. Warm (max 28°C on Tue morning, min 22°C on Sat night). Winds decreasing (strong winds from the S on Mon morning, calm by Tue afternoon). | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Tue night. 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 | ||||||||||||||
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 5 | E 7 | E 7 | ESE 8 | SSE 8 | S 9 | S 10 | S 9 | S 9 | SSE 8 | SSW 10 | S 9 | S 9 | SSW 9 | S 8 | S 8 | S 8 | E 14 | E 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 85 | 356 | 532 | 1186 | 953 | 1790 | 1778 | 848 | 601 | 306 | 540 | 699 | 445 | 151 | 224 | 182 | 144 | 140 | 239 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | on | cross-on | cross | cross-off | glassy | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
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 | ||||||||
Low Tide | 6:15AM0.51m | 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 | |||||||
 |  |  |  |  | |  | | |  | | | |  |  |  | | |  | |
 | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — |
 | 6:01 | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — |
mm | — | 6 | 18 | 80 | 15 | 13 | 14 | 3 | 4 | 7 | 3 | 4 | 4 | 1 | — | 1 | — | — | — |
Temp °C | 23 | 23 | 23 | 26 | 27 | 27 | 26 | 28 | 26 | 26 | 28 | 27 | 24 | 21 | 21 | 21 | 23 | 22 | 22 |
Feels °C | 22 | 21 | 24 | 27 | 26 | 26 | 27 | 32 | 32 | 30 | 30 | 30 | 29 | 21 | 22 | 22 | 27 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SSE 8 | S 9 | E 8 | E 9 | E 8 | S 9 | S 9 | SSE 8 | SSE 8 | E 9 | S 9 | SSE 8 | S 8 | S 8 | S 8 | S 8 | E 14 |
| kJ | 31 | 21 | 21 | 171 | 513 | 429 | 204 | 848 | 601 | 306 | 202 | 23 | 445 | 140 | 224 | 182 | 142 | 120 | 239 |
Swell 2 Height (m) Direction Period (s) | E 9 | SSE 8 | SW 9 | NE 10 | — | NNE 11 | NE 11 | E 8 | E 8 | SSW 10 | E 9 | SE 10 | E 9 | SSW 9 | E 15 | ENE 6 | E 14 | E 14 | S 8 |
| kJ | 24 | 7 | 3 | 92 | — | 12 | 5 | 138 | 115 | 154 | 53 | 26 | 26 | 151 | 67 | 26 | 144 | 140 | 82 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | ENE 14 | E 15 | SW 10 | — | — | — | SE 10 | SE 10 | E 9 | SE 10 | E 16 | E 16 | E 15 | SE 11 | E 14 | ENE 6 | ESE 10 | NE 6 |
| kJ | 11 | 19 | 4 | 4 | — | — | — | 27 | 27 | 97 | 15 | 46 | 43 | 68 | 29 | 100 | 15 | 31 | 16 |
Wind waves Height (m) Direction Period (s) | E 5 | E 7 | E 7 | ESE 8 | SSE 8 | S 9 | S 10 | — | — | — | SSW 10 | S 9 | NE 4 | NE 6 | ENE 6 | — | — | NE 6 | NE 6 |
| kJ | 85 | 356 | 532 | 1186 | 953 | 1790 | 1778 | — | — | — | 540 | 699 | 26 | 64 | 64 | — | — | 18 | 27 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 513 | 530 | 530 | 595 | 273 | 273 | 70 | 0 | 0 | 30 | 35 | 35 | 29 | 22 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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.
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