
Surf Forecasts:
Big Ben surf forecast from 6 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 12AM (local time) - 10ft (3.0m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 9AM (local time) - 10ft (3.0m), 10s period, ENE swell with 2,007 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 6AM (local time) - 5ft (1.5m), 11s 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 Saturday (Aug 08) at 6AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 1.2m and 9s. 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 3.0m 10s and forecast to arrive on Tuesday (Aug 11) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Aug 10) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 8th Aug) | 5ft (1.5m) 11s |
| Best Surf | 12AM (Tue 11th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 9AM (Tue 11th Aug) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into this next 16-day window for the local zone. We’ve got some action, but it’s a bit of a slow burn to start, so don’t be in a rush.
Alright, the first real surfable days are a bit of a grind. The swell kicks in, but the wind is a real pain in the arse. We’re looking at a solid 8ft S swell rolling in on Thursday the 6th of August, with a period of 12 seconds, giving us a strong 2408 wave energy. But the rub is a cross-on ESE wind at 9 mph, which is going to make it choppy and messy. The water is 78°, which is a bit colder than usual for this time of year. Honestly, it’s a pass for paddle surfing, but with that much energy and dodgy wind, it might be a better day for the kite crew.
Friday the 7th and Saturday the 8th don’t get much better. The swell drops a touch, but the onshore wind keeps it lumpy. The energy is still moderate, but the quality is just not there. It’s a frustrating wait.
Now, we start to see a glimmer on Sunday the 9th. The wind finally swings around to a light ENE cross-shore at 6 mph, with a 7ft E swell running 13 seconds. The energy is a solid 1733. Things are still a bit raw, but it’s a step in the right direction. The swell is real, but it’s not firing on all cylinders just yet.
The real standout, the one that’s got me excited, is Tuesday the 11th of August. The morning window is the pick of the entire forecast. We’re looking at a clean 10ft ENE swell with a 10-second period, and a fresh cross-offshore NNE wind at 19 mph. The energy is a massive 3512. Now, a word of warning: 10ft is solid and this is a beach/jetty setup, so this is strictly for the experienced crew. Beginners, stay out of the water. The wind is going to hold it open, but it’s a powerful, heavy wave. This is the day to get excited about, but it’s a long way out, so keep your fingers crossed the forecast holds.
The rest of the second week is a bit of a mixed bag. There’s consistent swell, mostly 7ft to 8ft from the east, but the wind is often cross-on or cross-shore, keeping it from being truly clean. Thursday the 13th afternoon has a decent window with light cross-offshore wind and clean conditions, but the swell is a bit smaller. The energy is moderate, and it’s a good option for the experienced guys to get a session in.
After that, the swell drops off through the 18th and 19th, dipping below 5ft, and the energy fades. The wind gets lighter, but the swell just isn’t there to make it worth the paddle. It’s a quiet end to the run.
So, to wrap it up: the first week is a write-off for quality surfing. The absolute standout is the morning of Tuesday the 11th of August – that’s the one to circle on the calendar, but it’s for the experts only. Thursday the 13th afternoon is a solid backup option. Otherwise, it’s a bit of a dry spell. As always, forecasts change, so don’t write it off completely.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 29°C on Thu afternoon, min 24°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sun afternoon, min 22°C on Sun night). Winds decreasing (fresh winds from the NE on Tue afternoon, light winds from the NNE by Tue night). | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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) | S 12 | S 13 | S 12 | S 12 | S 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 10 | ENE 11 |
Wave Graph | ||||||||||||||||||||
1933 | 1938 | 1170 | 887 | 617 | 504 | 633 | 1341 | 1443 | 1207 | 1065 | 1204 | 1363 | 1749 | 2007 | 1326 | 1855 | 809 | 842 | 1559 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | on | on | glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-off |
High Tide | 9:01PM1.40m | 9:44PM1.36m | 4:28PM1.26m | 11:10PM1.33m | 4:23PM1.35m | 00:59AM1.34m | 4:40PM1.42m | 2:16AM1.40m | 5:00PM1.47m | 3:13AM1.47m | 5:21PM1.50m | |||||||||
Low Tide | 5:14AM0.52m | 6:50AM0.45m | 6:32PM1.25m | 8:04AM0.35m | 8:47PM1.21m | 8:59AM0.25m | 9:34PM1.12m | 9:42AM0.17m | 10:08PM1.02m | 10:20AM0.13m | 10:38PM0.92m | |||||||||
— | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | |
6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | |
mm | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 16 |
Temp °C | 29 | 26 | 29 | 29 | 25 | 28 | 28 | 25 | 28 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 27 | 27 | 24 |
Feels °C | 32 | 30 | 32 | 32 | 28 | 31 | 30 | 29 | 30 | 29 | 26 | 25 | 25 | 23 | 26 | 26 | 23 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 13 | S 12 | S 12 | S 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | E 11 | ENE 11 | ENE 11 | SSW 11 | ENE 10 | SW 12 | SW 12 | ENE 11 |
1933 | 1938 | 1170 | 887 | 617 | 504 | 633 | 1341 | 1443 | 1207 | 1065 | 1204 | 1095 | 1167 | 1356 | 70 | 1288 | 140 | 140 | 1208 | |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 12 | SSW 11 | SSW 11 | SSW 11 | S 10 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | SSW 12 | SW 12 | SW 12 | — | E 14 | SW 11 |
424 | 425 | 358 | 370 | 293 | 330 | 430 | 394 | 290 | 138 | 112 | 121 | 90 | 90 | 77 | 92 | 92 | — | 65 | 101 | |
Swell 3 Height (m) Direction Period (s) | ENE 16 | ENE 15 | ENE 15 | ENE 15 | ENE 14 | E 10 | E 10 | — | — | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SW 12 | — | SSW 11 | — | E 14 | — |
51 | 46 | 42 | 43 | 41 | 46 | 45 | — | — | 87 | 184 | 120 | 130 | 93 | 72 | — | 70 | — | 179 | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 10 | ENE 11 |
— | — | — | — | — | — | — | — | — | — | — | — | 1363 | 1749 | 2007 | 1326 | 1855 | 809 | 842 | 1559 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 29 | 29 | 30 | 30 | 30 | 29 | 30 | 0 | 22 | 35 | 0 | 35 | 29 | 90 | 184 | 513 | 29 | 29 | 35 | 22 |
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.











