Surf Forecasts:
Big Ben surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 12PM (local time) - 10ft (3.0m), 8s period, ENE swell with cross-shore winds.
- Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 13ft (4.0m), 11s period, SSE swell with 3,488 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 3AM (local time) - 2ft (0.6m), 11s period with SSW 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 Friday (Sep 04) at 3AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.6m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 4.0m 11s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Sep 07) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 4th Sep) | 2ft (0.6m) 11s |
| Best Surf | 12PM (Sun 6th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 9AM (Tue 8th Sep) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s run through the same deal in feet and miles per hour.
We’re looking at a slow start, with nothing worthwhile until the weekend. From Thursday the 3rd through Friday the 4th, it’s all poor surf conditions – small, weak, and messy. Save your energy.
Saturday the 5th gets a little interesting. Big Ben is showing 5ft to 6ft swell from the east, but with a short period of just 6 to 7 seconds, it’s lacking power. The wind is cross-offshore from the north-northeast at 12 mph, keeping it clean. The combined energy is moderate, between 224 and 329. It’s borderline, but it’s the first real chance.
Sunday the 6th morning is the pick for the early run. The swell hits 8ft from the east-northeast, still a short 7-second period, but the wind is cross-offshore and clean from the north-northeast at 19 mph. Wave energy is strong at 688. This is a beginner-friendly spot, but at 8ft, it’s getting big for the less experienced. The water temp is 80°, about average for the time of year.
Now, the standout for experts. Tuesday the 8th. The swell jumps to 13ft in the morning from the south-southeast, with a period of 11 seconds – real groundswell. The combined energy is a massive 6286, so there’s plenty of power. The wind is cross from the southwest at 15 mph, but the size is the issue. This is only for the experienced crew; it’s too big for anyone else. The afternoon drops to 12ft, but still a beast. For a beach/jetty setup, a long period swell like this can break a bit straight, but for the experts, it’ll be a wild ride.
After that, it fades. The 10th and 11th show clean-ish but dropping swell, from 8ft down to 5ft, with cross-off or cross winds. Not a total loss.
The second week is quiet. From the 12th to the 17th, it’s small, weak, and choppy. Swell drops under 3ft with longer periods of 13 to 14 seconds, but the energy is low (around 400-500) and winds are messy. Nothing to get excited about.
Finally, on Friday the 18th, a glassy morning. A tiny 1ft south-southwest swell with only 95 energy, but the wind is glassy at 3 mph from the west-northwest. Surfable if you’re keen, but don’t expect much.
Bottom line: Sunday the 6th morning is the best bet for most surfers. Tuesday the 8th is the big one for experts only. The rest is mostly a dud.
Rusty.
Short Range ForecastHeavy rain (total 78mm), heaviest during Fri night. Warm (max 28°C on Thu afternoon, min 20°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NE by Sun morning). | Days 5-7 Weather SummaryHeavy rain (total 196mm), heaviest during Sun night. Warm (max 28°C on Wed morning, min 23°C on Sun afternoon). Mainly strong winds. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 10 | E 10 | E 9 | SSW 10 | SSW 9 | E 6 | E 7 | ENE 6 | ENE 7 | ENE 8 | E 9 | ENE 9 | ENE 9 | SSE 9 | SSE 11 | SSE 11 | SSE 10 | SSE 9 | S 9 | S 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 94 | 68 | 83 | 75 | 65 | 123 | 250 | 298 | 655 | 1390 | 1541 | 552 | 383 | 1344 | 3488 | 2397 | 1149 | 787 | 1044 | 1184 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | on | on | cross | cross | cross | cross-on | cross-on | cross-on | cross-off |
High Tide | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | 8:08PM1.35m | 3:59PM1.32m | 10:09PM1.26m | 3:49PM1.38m | 1:09AM1.28m | 4:00PM1.44m | 2:25AM1.38m | 4:17PM1.48m | |||||||||
Low Tide | 3:00AM0.47m | 1:21PM1.08m | 4:21AM0.52m | 6:15AM0.51m | 8:43PM1.26m | 7:44AM0.44m | 8:59PM1.14m | 8:40AM0.37m | 9:23PM1.01m | 9:23AM0.31m | 9:48PM0.87m | |||||||||
 |  |  |  |  |  | |  | | | | | |  |  |  | | | | | |
 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — |
 | 6:04 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — |
mm | 2 | 1 | — | 2 | 65 | 7 | — | — | 1 | 3 | 113 | 25 | 31 | 8 | — | 1 | 11 | 4 | 4 | 16 |
Temp °C | 28 | 24 | 26 | 26 | 23 | 21 | 21 | 22 | 23 | 23 | 25 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
Feels °C | 30 | 27 | 29 | 29 | 24 | 20 | 20 | 20 | 21 | 20 | 27 | 28 | 25 | 28 | 27 | 31 | 31 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 9 | SE 6 | SSW 9 | SSW 10 | SSW 9 | SW 9 | SW 9 | SSW 9 | SSW 10 | ENE 9 | ENE 9 | SSE 9 | SSE 11 | SSE 11 | SSE 10 | SSE 9 | ENE 9 | S 10 |
| kJ | 94 | 68 | 83 | 31 | 65 | 63 | 59 | 29 | 20 | 8 | 10 | 552 | 383 | 1344 | 2721 | 2397 | 1149 | 787 | 16 | 1184 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 8 | SE 6 | SSW 10 | E 9 | E 9 | ENE 13 | SSW 8 | SSE 8 | — | — | SSE 7 | SSE 8 | ENE 9 | ENE 9 | E 9 | SW 10 | E 16 | E 16 | E 15 |
| kJ | 38 | 33 | 33 | 75 | 58 | 26 | 17 | 11 | 7 | — | — | 114 | 298 | 208 | 77 | 57 | 34 | 47 | 46 | 40 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | SE 5 | SSW 10 | E 9 | SE 7 | SE 9 | SE 8 | SSE 8 | SE 12 | — | — | ESE 11 | — | E 18 | — | E 19 | NE 7 | NE 6 | NNE 7 | E 9 |
| kJ | 15 | 14 | 78 | 58 | 27 | 12 | 3 | 7 | 6 | — | — | 12 | — | 6 | — | 7 | 2 | 2 | 5 | 13 |
Wind waves Height (m) Direction Period (s) | SSW 4 | ENE 4 | — | ENE 4 | NE 4 | E 6 | E 7 | ENE 6 | ENE 7 | ENE 8 | E 9 | NW 4 | NE 3 | — | SSE 11 | — | — | — | S 9 | — |
| kJ | 12 | 16 | — | 9 | 8 | 123 | 250 | 298 | 655 | 1390 | 1541 | 10 | 2 | — | 3488 | — | — | — | 1044 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 120 | 29 | 6 | 22 | 29 | 29 | 184 | 595 | 513 | 513 | 513 | 29 | 184 | 81 | 70 | 35 | 30 | 177 | 555 | 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.
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