Surf Forecasts:
Big Ben surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 12AM (local time) - 6ft (1.9m), 14s period, ESE swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 3PM (local time) - 8ft (2.5m), 12s period, E swell with 1,691 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 6AM (local time) - 4.5ft (1.4m), 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 Saturday (Aug 08) at 6AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 1.1m 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 2.5m 12s and forecast to arrive on Friday (Aug 14) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 8th Aug) | 4.5ft (1.4m) 11s |
| Best Surf | 12AM (Sun 9th Aug) | 6ft (1.9m) 14s |
| Most Powerful | 3PM (Fri 14th Aug) | 8ft (2.5m) 12s |
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's on the cards for Big Ben.
The coming week is a bit of a mixed bag, to be honest. We've got some sizeable swell on the horizon, but the wind and conditions will be a real factor. The first real standout looks to be Monday the 10th of August, with a solid 8ft to 8ft easterly swell pushing through. The energy is moderate to strong (1858), and the wind is blowing cross-off shore in the morning, which should keep things reasonably clean. The swell period is a solid 12 seconds, so there's some proper groundswell happening there. It's a bit on the bigger side, not for beginners, but the shape should be there. Do keep in mind, the occasional crowd is a possibility here.
The real standout, the one you want to circle on the calendar, is the morning of Saturday the 15th of August. The swell is sitting at a solid 8ft from the east-northeast, with a combined energy reading that's very strong (3247). The wind is cross-off from the north-northeast at 12 mph, and the conditions are described as clean. That's a powerful combo for this spot. The period is 11 seconds, which is a solid long-period groundswell. This is definitely expert territory with that size, but if you've got the skills, it's the pick of the forecast.
We also have some promising glassy mornings towards the end of the run. The mornings of Monday the 17th and Tuesday the 18th of August show clean, glassy conditions with 5ft to 6ft of east swell. The energy is weak to moderate (647-742), making for a much more manageable session. Those mornings will be the best bet for the less experienced crew, with clean, peeling waves and no wind to mess them up.
After that, the swell starts to fade and the wind patterns become less favourable, with a lot of cross-on and onshore breezes, and the energy drops right off by the end of the third week. The last few days of the forecast window are a write-off.
So, to sum it up: the early mornings of the 17th and 18th are your best bet for a clean, fun-size wave, but the main event is the morning of Saturday the 15th for the big, powerful stuff.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat morning, min 23°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 36mm), heaviest during Thu afternoon. Warm (max 28°C on Wed morning, min 22°C on Mon night). Winds increasing (light winds from the NNE on Mon night, fresh winds from the SSW by Tue afternoon). | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | E 12 | E 11 | E 12 | E 12 | ENE 10 | E 9 | E 10 | E 10 | E 11 | E 11 | ENE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 617 | 513 | 633 | 1360 | 1421 | 1335 | 1048 | 1547 | 1624 | 1065 | 1027 | 1010 | 385 | 180 | 188 | 284 | 669 | 790 | 862 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross | cross | cross-on | on | on | cross | cross | cross | cross-off |
High Tide | 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 | 4:00AM1.54m | 5:41PM1.52m | |||||||
Low Tide | 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 | 10:54AM0.14m | 11:08PM0.81m | |||||||
 |  | | | | |  | | |  |  | | | | |  | | |  | |
 | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — |
 | 6:37 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | 1 | 2 | 3 | 4 | 7 | 15 | 6 |
Temp °C | 26 | 29 | 28 | 25 | 28 | 28 | 24 | 28 | 28 | 24 | 26 | 26 | 26 | 28 | 27 | 25 | 27 | 26 | 24 |
Feels °C | 30 | 32 | 30 | 29 | 29 | 29 | 27 | 26 | 27 | 25 | 26 | 27 | 25 | 29 | 29 | 28 | 29 | 27 | 24 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | E 12 | E 11 | E 12 | E 12 | ENE 10 | E 9 | E 10 | E 10 | E 11 | E 11 | ENE 11 |
| kJ | 617 | 513 | 633 | 1360 | 1421 | 1335 | 1048 | 1547 | 1624 | 1065 | 1027 | 1010 | 385 | 180 | 188 | 284 | 669 | 790 | 862 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 12 | SSW 11 | SSW 11 | SSW 10 | SSW 11 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 |
| kJ | 293 | 330 | 363 | 297 | 195 | 226 | 146 | 184 | 139 | 116 | 88 | 123 | 94 | 154 | 151 | 151 | 143 | 121 | 88 |
Swell 3 Height (m) Direction Period (s) | ENE 14 | E 10 | E 10 | SW 14 | — | — | SSW 10 | SSW 12 | SSW 11 | SSW 11 | SW 11 | SW 11 | SW 12 | SE 13 | SE 12 | SSE 5 | SE 11 | SE 11 | SE 11 |
| kJ | 41 | 46 | 45 | 29 | — | — | 110 | 106 | 95 | 90 | 44 | 63 | 48 | 26 | 24 | 7 | 20 | 20 | 33 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 3 | SSE 5 | ESE 5 | ESE 5 | ENE 5 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 5 | 26 | 111 | 66 | 24 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 30 | 29 | 30 | 0 | 6 | 22 | 0 | 35 | 35 | 0 | 35 | 183 | 30 | 29 | 30 | 22 | 184 | 534 | 530 |
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)
Latest Updates
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