
Surf Forecasts:
Big Ben surf forecast from 29 Jul 2026:
- Best quality surf: Monday 3 Aug, 3PM (local time) - 10ft (3.0m), 17s period, SE swell with cross-shore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 16ft (5.0m), 17s period, SSE swell with 14,067 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 9PM (local time) - 3ft (0.9m), 7s 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 Wednesday (Jul 29) at 9PM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.5m and 10s. 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 5.0m 17s and forecast to arrive on Wednesday (Aug 05) at 12PM. 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+) | 9PM (Wed 29th Jul) | 3ft (0.9m) 7s |
| Best Surf | 3PM (Mon 3rd Aug) | 10ft (3.0m) 17s |
| Most Powerful | 12PM (Wed 5th Aug) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s cooking for the next couple of weeks.
This is a pretty grim start, I’m not gonna lie. For the first several days, there’s nothing worth paddling out for. The swell is tiny, the wind is messy, and the conditions are just plain ordinary. We’re looking at a gap of over a week before anything even gets close to interesting. The water temp is sitting at 80°F with a normal anomaly of 0.7°F, so it’s about average for this time of year.
The first real glimmer of hope comes on Sunday, August 3rd, but it’s a tricky one. Big Ben (beach/jetty) is an exposed spot that likes swell from the SE. By Monday afternoon, August 3rd, we see a solid 10ft swell from the SE, with a period of 17 seconds. That’s a very long period groundswell, which means proper energy and long lulls between sets. The combined energy is 4653 (moderate to strong), and while the wind is a cross-shore from the NE at 12 mph, it’s manageable. The problem is, the data says the swell is predicted to be too big for this break. At 10ft, it’s getting into the “experts only” zone. This is a beach/jetty setup, so that kind of power and size could be a handful. The long period groundswell will also make it break straight at the beach, so it’s not ideal for the lineup. For a true standout, I’d have to look elsewhere, but this is the only game in town.
The morning of Tuesday, August 4th, is more of the same – 12ft from the SE (6874 combined energy) and cross-shore NE wind at 12 mph. Again, too big for this spot.
By Saturday, August 8th, the swell drops to a more manageable 7ft from the SW (2425 combined energy), with a light cross-onshore breeze from the S at 6 mph. The period is 15 seconds, still a nice groundswell, but the wind is a little onshore. The conditions are described as “marginal,” so it’s not going to be a clean, glassy session. It’s a step down from the huge stuff, but still not the best it could be.
Sunday, August 9th, sees 7ft from the E (2867 combined energy), with onshore wind from the SE at 6 mph. That’s a wind direction that will put a chop on the face. Not great.
Looking further into the second week, the swell stays in the 5ft to 7ft range, mostly from the E and ENE, with cross-onshore winds. The periods drop to 12 to 14 seconds. The combined energy values are moderate. Honestly, nothing here screams “go.” It’s all marginal or poor.
So, the bottom line: if you’re an expert and can handle some serious size, the Monday afternoon, August 3rd, and Tuesday morning, August 4th, are your only real shots. For everyone else, this is a long, blank run. The one standout is the Monday afternoon, August 3rd, with that 10ft, 17-second SE groundswell, but only if you’re ready for a heavy session at Big Ben.
Stay patient, and keep an eye on the forecasts. Things can change.
Rusty
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 31°C on Sun morning, min 22°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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) | SSW 7 | SW 7 | SE 10 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | E 11 | SE 15 | SE 16 | ESE 15 | ESE 15 | ESE 16 | ESE 16 | SE 17 | SE 17 | SE 17 | SE 16 | SE 16 | SE 17 |
Wave Graph | ||||||||||||||||||||
134 | 69 | 29 | 48 | 60 | 62 | 45 | 20 | 56 | 133 | 279 | 886 | 1098 | 1904 | 3782 | 4501 | 6404 | 6695 | 7700 | 10018 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | glassy | cross | cross-off | cross | on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross |
High Tide | 5:50PM1.50m | 4:19AM1.53m | 6:13PM1.51m | 5:03AM1.55m | 6:35PM1.50m | 5:45AM1.54m | 6:57PM1.49m | 6:27AM1.49m | 7:20PM1.48m | 7:11AM1.41m | 7:42PM1.47m | 7:59AM1.30m | 8:06PM1.45m | |||||||
Low Tide | 11:02PM0.94m | 11:20AM0.08m | 11:34PM0.85m | 11:52AM0.14m | 00:07AM0.76m | 12:24PM0.23m | 00:41AM0.69m | 12:53PM0.36m | 1:18AM0.62m | 1:22PM0.51m | 1:59AM0.58m | 1:49PM0.67m | 2:48AM0.56m | |||||||
— | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — | |
6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 31 | 28 | 31 | 30 | 27 | 30 | 29 | 26 | 30 | 30 | 27 | 31 | 30 | 25 | 26 | 26 | 23 | 27 | 26 | 24 |
Feels °C | 34 | 32 | 34 | 33 | 31 | 33 | 32 | 30 | 34 | 34 | 32 | 34 | 33 | 27 | 26 | 26 | 23 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SW 7 | SSW 6 | SE 10 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | SSE 5 | SE 16 | ESE 15 | ESE 15 | ESE 16 | ESE 16 | SE 17 | SE 17 | SE 17 | SE 16 | SE 16 | SE 17 |
48 | 69 | 29 | 24 | 60 | 62 | 45 | 15 | 16 | 133 | 279 | 886 | 1098 | 1904 | 3782 | 4501 | 6404 | 6695 | 7700 | 10018 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 10 | SE 10 | E 8 | ENE 8 | ENE 8 | SE 9 | E 11 | ESE 11 | S 5 | ESE 10 | ENE 16 | ENE 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 |
15 | 23 | 23 | 13 | 14 | 13 | 14 | 20 | 39 | 14 | 56 | 82 | 72 | 109 | 101 | 98 | 94 | 93 | 87 | 84 | |
Swell 3 Height (m) Direction Period (s) | NE 8 | E 9 | SSW 7 | ENE 12 | SE 10 | SE 9 | E 11 | NE 8 | SE 15 | E 11 | ENE 16 | NE 7 | ENE 7 | — | — | — | — | — | — | — |
10 | 14 | 10 | 14 | 24 | 14 | 10 | 9 | 56 | 59 | 83 | 13 | 5 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 7 | — | — | SSW 6 | — | ENE 2 | E 3 | SE 4 | E 4 | — | — | — | — | NE 4 | ENE 5 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | — |
134 | — | — | 48 | — | 1 | 1 | 5 | 4 | — | — | — | — | 14 | 40 | 54 | 93 | 86 | 91 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 24 | 0 | 0 | 30 | 0 | 6 | 30 | 30 | 30 | 30 | 0 | 22 | 22 | 29 | 29 | 29 | 29 | 29 | 48 | 29 |
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.










