Surf Forecasts:
Big Ben surf forecast from 1 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 12AM (local time) - 10ft (3.0m), 16s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 15ft (4.5m), 16s period, SE swell with 10,165 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 2.5ft (0.7m), 16s period with SE 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 01) at 9PM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 0.7m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 4.5m 16s and forecast to arrive on Wednesday (Aug 05) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 1st Aug) | 2.5ft (0.7m) 16s |
| Best Surf | 12AM (Tue 4th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 9AM (Wed 5th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
G’day, Rusty here. Lookin’ at the next 16 days for Big Ben, and honestly, it’s a bit of a tease. The first week’s a write-off, but then there’s a couple of days that’ll get your heart pumping—if you’ve got the skills for it.
The first real surf we see is on Saturday, August 3rd morning, but it’s a tough read. The swell’s coming up to 7 ft from the SE with a long 16-second period, and the energy’s strong (2776). But the wind’s cross-shore at 16 mph, and the reports say “marginal surf forecast.” It’s not clean, and it’s a bit too big for a beginner spot. Not a day to get excited about.
Then things get wild. The standout is Tuesday, August 6th. Morning brings a solid 13 ft swell from the ESE, 16-second period, and the energy is massive (8144). The wind is cross-offshore at 16 mph, keeping it clean. The reports say it’s “wind and tide favorable, but the swell is predicted to be too big for this break.” At over 8 ft, this is for experts only. The water’s 80°F, which is about average for the time of year, so no worries there. If you’re a seasoned hand, this is the morning to paddle out. Crowds are possible, but honestly, with that size, most will be watching from the beach.
Wednesday, August 7th, is even bigger—15 ft from the SE in the morning, with a ridiculous 16-second period and energy hitting 10688. Again, clean with cross-offshore wind. This is pure, raw power, but it’s strictly for the brave. The afternoon gets a bit messy with cross-shore wind.
The rest of the window is a letdown. From Thursday, August 8th onwards, the swell drops and the wind turns cross-onshore, making things choppy. There’s a gap from the 9th to the 16th where the surf is either too messy, too small, or just plain poor. Sunday, August 18th, has a 5 ft swell from the E, but it’s only 9 seconds and the wind is onshore—pretty much a flat day for the average surfer.
So, to sum it up: the only real window is the first few days of August, with Tuesday and Wednesday mornings being the absolute standouts. Massive, clean, and powerful if you can handle it. Otherwise, it’s a long wait for the next run.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Sat morning, min 22°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Warm (max 29°C on Thu morning, min 22°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
AM | 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 6 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 15 | SE 16 | SE 16 | SE 16 | ESE 16 | SE 17 | SE 16 | SE 16 | SSE 16 | SSE 16 | S 16 | S 16 | S 15 | S 15 | SSW 16 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 43 | 124 | 217 | 892 | 936 | 1368 | 2408 | 3182 | 4261 | 7461 | 7305 | 9341 | 10165 | 10091 | 9045 | 8457 | 6998 | 4398 | 3731 | 3354 | 2513 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | glassy | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:57PM1.49m | 6:27AM1.49m | 7:20PM1.48m | 7:11AM1.41m | 7:42PM1.47m | 7:59AM1.30m | 8:06PM1.45m | 9:01AM1.18m | 8:31PM1.43m | 10:40AM1.08m | 9:01PM1.40m | 9:44PM1.36m | |||||||||
Low Tide | 12:24PM0.23m | 00:41AM0.69m | 12:53PM0.36m | 1:18AM0.62m | 1:22PM0.51m | 1:59AM0.58m | 1:49PM0.67m | 2:48AM0.56m | 2:13PM0.83m | 3:50AM0.55m | 2:28PM0.99m | 5:14AM0.52m | |||||||||
 |  |  | | | | | |  | | | | | | |  |  | | | | | |
 | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — |
 | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | — |
Temp °C | 31 | 30 | 27 | 29 | 27 | 24 | 25 | 26 | 23 | 25 | 25 | 23 | 26 | 27 | 25 | 29 | 29 | 26 | 29 | 28 | 26 |
Feels °C | 35 | 33 | 31 | 32 | 27 | 24 | 24 | 25 | 22 | 22 | 23 | 22 | 26 | 28 | 27 | 30 | 31 | 29 | 31 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SE 16 | SE 15 | ESE 16 | ESE 15 | ESE 15 | SE 16 | SE 16 | SE 16 | ESE 16 | SE 17 | SE 16 | SE 16 | SSE 16 | SSE 16 | S 16 | S 16 | S 15 | S 15 | SSW 16 | SSW 15 |
| kJ | 18 | 124 | 217 | 892 | 936 | 1368 | 2408 | 3182 | 4261 | 7461 | 7305 | 9341 | 10165 | 10091 | 9045 | 8457 | 6998 | 4398 | 3731 | 3354 | 2513 |
Swell 2 Height (m) Direction Period (s) | E 11 | ESE 11 | SSW 6 | SSW 6 | ENE 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | — | E 11 | E 10 | E 10 | E 10 | ESE 10 | ESE 10 | ENE 15 | ESE 10 |
| kJ | 21 | 39 | 26 | 12 | 72 | 109 | 98 | 101 | 96 | 93 | 87 | 87 | — | 394 | 563 | 443 | 458 | 342 | 335 | 42 | 506 |
Swell 3 Height (m) Direction Period (s) | NE 8 | SE 8 | ESE 18 | ENE 16 | SW 6 | S 13 | SE 21 | — | — | — | — | — | — | — | — | ENE 16 | ENE 16 | ENE 15 | ENE 15 | — | ENE 14 |
| kJ | 15 | 11 | 209 | 82 | 9 | 3 | 162 | — | — | — | — | — | — | — | — | 25 | 51 | 46 | 42 | — | 41 |
Wind waves Height (m) Direction Period (s) | SSW 6 | SSW 6 | — | NE 7 | ENE 4 | ENE 6 | ENE 6 | ENE 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | E 11 | — | — | — | — | ESE 10 | ESE 10 | — |
| kJ | 43 | 27 | — | 7 | 32 | 97 | 108 | 215 | 357 | 590 | 414 | 310 | 523 | 535 | — | — | — | — | 454 | 495 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 30 | 0 | 29 | 48 | 29 | 29 | 55 | 184 | 184 | 29 | 534 | 595 | 29 | 29 | 29 | 48 | 63 | 48 | 95 | 50 |
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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