
Surf Forecasts:
Big Ben surf forecast from 2 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, 3PM (local time) - 15ft (4.5m), 16s period, SE swell with 11,028 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 12AM (local time) - 10ft (3.0m), 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 Tuesday (Aug 04) at 12AM. The primary swell is predicted to be 3.0m and 16s period with a secondary swell of 0.5m and 14s. Another secondary swell of 1.8m and 7s is also forecast. 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 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Aug 05) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 4th Aug) | 10ft (3.0m) 16s |
| Best Surf | 12AM (Tue 4th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 3PM (Wed 5th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, grab your board, I’m Rusty, and I’m looking at what’s coming down the line for us. We have one main spot lighting up on the forecast: Big Ben, a beach and jetty setup that's exposed to the swell. It’s an inconsistent spot, so when it does start showing, we need to pay attention.
Right now there’s no real surf to get excited about for the first few days. The weekend is a bit of a washout, with small, choppy conditions. We’ve got light cross-onshore winds making things messy and really weak wave energy (985) on Sunday morning the 2nd. It’s not worth paddling out.
Monday the 3rd sees a jump in energy, but the winds are fresh and the surf quality is still marginal. The real story begins on Tuesday the 4th of August. The swell jumps up, coming in from the SE with waves hitting 12 ft. Now, that’s a proper amount of water. The combined energy is strong at 5811, and it's a long-period groundswell at 16 seconds. That’s the kind of energy that lines up. The morning has clean, cross-offshore winds from the NE. This is the standout window for the week — it’s big, clean, and powerful. However, at 12 ft, this is strictly for experienced surfers. Beginners, stay on the sand. The water temp is normal for the time of year at 81°, so no wetsuit needed.
Wednesday the 5th keeps the heavy stuff coming with 15 ft swell from the SE, and again clean in the morning with cross-offshore winds. The energy is very strong (11070). This is still expert-only territory. The swell direction from SE is a good match for the optimum direction for the break.
After that, we’ve got a solid run of big surf through to the 7th of August, but the wind starts to turn more onshore, making it lumpy. By the 8th and 9th, the swell is backing off, and we’re looking at choppier conditions. There’s a long gap of days after that where the surf is either too big and messy or just small and poor.
Looking further ahead, Tuesday the 11th of August brings another pulse of ENE swell at 8 ft to 10 ft. The morning of the 11th has clean cross-off winds from the north. The energy is moderate to strong (2865), but the period drops to 12 seconds, which is still decent. This could be a good option for intermediate surfers, but the bigger afternoon session (10 ft) is again for experts only.
Wednesday the 12th still has big 12 ft surf in the morning, but by Thursday the 13th, the winds go lighter and the swell is still big but period drops off. This is a long stretch of days that will be too big and powerful for the average surfer, and the inconsistent nature of the break makes it a gamble for everyone else.
The very end of the forecast, around Sunday the 16th and Monday the 17th, looks like it's falling apart. Small, weak, and choppy again. Overall, the pick of the entire 16-day window is clearly the Tuesday the 4th morning session at Big Ben. It’s big, it’s clean, and the groundswell has real weight. If you’re an expert, that’s your window. There’s a good stretch of big surf after that, but the wind quality drops. Keep an eye on the morning windows for the cleanest conditions.
Until next time, keep your head on a swivel.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Sun morning, min 22°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 28°C on Thu morning, min 24°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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) | ESE 16 | ESE 15 | SE 15 | ESE 16 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | S 16 | S 16 | S 16 | S 15 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
892 | 936 | 1453 | 2058 | 3610 | 4261 | 5321 | 6861 | 10626 | 10886 | 11028 | 8424 | 8405 | 7370 | 5535 | 3681 | 2801 | 2721 | 2812 | 3142 | 2233 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 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 | 4:28PM1.26m | 11:10PM1.33m | |||||||||
Low Tide | 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 | 6:50AM0.45m | 6:32PM1.25m | |||||||||
4:48 | — | — | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | |
— | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | — | — | — | 3 | 6 | — | — |
Temp °C | 30 | 28 | 25 | 26 | 26 | 23 | 25 | 26 | 23 | 26 | 26 | 24 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 25 |
Feels °C | 33 | 30 | 26 | 25 | 25 | 22 | 22 | 24 | 21 | 25 | 25 | 24 | 30 | 29 | 28 | 29 | 29 | 29 | 30 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 15 | SE 15 | ESE 16 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | S 16 | S 16 | S 16 | S 15 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SW 16 |
892 | 936 | 1453 | 2058 | 3610 | 4261 | 5321 | 6861 | 10626 | 10886 | 11028 | 8424 | 8405 | 7370 | 5535 | 3681 | 2801 | 2721 | 2812 | 3142 | 2233 | |
Swell 2 Height (m) Direction Period (s) | SSW 5 | ENE 15 | E 15 | SE 21 | E 14 | E 14 | E 14 | E 13 | E 13 | — | — | E 11 | E 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SE 9 |
11 | 72 | 109 | 358 | 98 | 94 | 93 | 87 | 87 | — | — | 736 | 520 | 533 | 573 | 612 | 632 | 531 | 497 | 484 | 560 | |
Swell 3 Height (m) Direction Period (s) | ENE 16 | SW 5 | SW 6 | E 14 | — | — | — | — | — | — | — | ENE 17 | ENE 16 | ENE 16 | ENE 15 | ENE 15 | ENE 15 | ENE 14 | ENE 14 | ENE 14 | S 12 |
82 | 7 | 5 | 98 | — | — | — | — | — | — | — | 27 | 25 | 51 | 46 | 42 | 42 | 41 | 40 | 40 | 45 | |
Wind waves Height (m) Direction Period (s) | — | ENE 4 | NE 4 | NE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | — | NE 6 | — | — | — | — | — | ESE 9 | — | — | — | — | — |
— | 8 | 28 | 114 | 181 | 344 | 397 | 447 | — | 184 | — | — | — | — | — | 765 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 81 | 29 | 184 | 595 | 534 | 184 | 534 | 534 | 532 | 2247 | 63 | 29 | 48 | 48 | 48 | 95 | 6 | 29 | 70 | 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.











