
Surf Forecasts:
Big Ben surf forecast from 3 Aug 2026:
- Best quality surf: Monday 3 Aug, 9PM (local time) - 10ft (3.0m), 17s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 6AM (local time) - 15ft (4.5m), 16s period, SE swell with 10,534 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 9PM (local time) - 10ft (3.0m), 17s 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 Monday (Aug 03) at 9PM. The primary swell is predicted to be 3.0m and 17s period with a secondary swell of 0.5m and 14s. Another secondary swell of 1.7m 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 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Monday (Aug 10) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 3rd Aug) | 10ft (3.0m) 17s |
| Best Surf | 9PM (Mon 3rd Aug) | 10ft (3.0m) 17s |
| Most Powerful | 6AM (Wed 5th Aug) | 15ft (4.5m) 16s |
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 coming up for Big Ben.
We've got a serious run of south-east groundswell on the way, but here's the thing: this break is a beach/jetty setup and it's exposed, so it catches everything. That means when the swell gets big, it gets real challenging. The water is sitting at 82° right now, which is a touch warmer than normal for this time of year, so that's a nice bonus.
The first few days are a bit of a write-off for the average surfer. Monday the 3rd sees a 7 ft swell building, but with a moderate cross-off breeze, it's not really coming together. The combined energy is already at 2609 (moderate), but conditions are marginal.
Now, Tuesday the 4th through Thursday the 6th is where it gets interesting, but only for the experts. We're looking at a solid 12 ft to 15 ft south-east swell, with a very long 16-second period. The combined energy is huge – 6292, 7045, even 10311 (very strong) – so there's a ton of power. The wind is a moderate cross-off to cross, so the faces will be clean. But at over 12 ft, this is strictly for the big-wave crew. The beach break setup means it'll be a heavy, shifty paddle-out.
After that, from Friday the 7th through the weekend, the swell drops to 8 ft to 6 ft, but the wind swings onshore and we get a cross-chop. The energy is still moderate but the quality is poor. Not worth paddling out.
The next standout is Monday the 10th of August. Another big pulse of east-northeast swell, 13 ft, with a 13-second period. The combined energy is 9069 (very strong). The morning has a clean, cross-off breeze. But again, 13 ft at a beach break is a beast – only for the hardcore, and even then, it's a question of getting out the back.
The best window for the rest of us looks like Tuesday the 12th of August into Wednesday the 13th. The swell drops to a more manageable 7 ft to 7 ft, still from the east, with a 12-second period (good energy, around 1400-1900). The real winner is Wednesday morning the 12th – the wind goes glassy, dead calm, with a slight SSE air. That's the best call for a clean, fun session for experienced surfers, but it's a smaller window. The crowds at Big Ben are sometimes an issue, but on a glassy Wednesday morning mid-week, you might get lucky.
After that, the swell hangs around in the 7 ft to 8 ft range, but the wind is mostly cross or cross-on, and it gets lumpy. From the 15th onwards, we get another big spike of 12 ft on the Saturday, but with cross winds, it's not the one. The final week from the 17th sees the swell fade to 5 ft to 6 ft, with weak energy around 600-900 (weak). The conditions are just average.
So, to wrap it up: the absolute best window is Wednesday morning, August 12th – glassy conditions and a solid 7 ft east swell. That's your pick. The big 12 ft+ days on the 4th, 5th, and 10th are for the experts only. Everything else is either too onshore, too lumpy, or too small.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 22°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Fri morning. Warm (max 29°C on Thu morning, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | S 15 | S 15 | S 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 16 | SW 16 | SW 16 | E 14 |
Wave Graph | |||||||||||||||||||||
2058 | 3610 | 4498 | 5865 | 6530 | 10162 | 10311 | 9888 | 6904 | 6150 | 5889 | 4041 | 3284 | 2824 | 2025 | 2064 | 2061 | 1630 | 1392 | 1552 | 1225 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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-on | cross-on | cross-on | cross | cross | cross | cross-off |
High Tide | 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 | 4:23PM1.35m | 00:59AM1.34m | |||||||||
Low Tide | 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 | 8:04AM0.35m | 8:47PM1.21m | |||||||||
4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | |
— | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 4 | 4 | 7 | 5 | 4 | — | — | — | — | — | — |
Temp °C | 25 | 25 | 23 | 26 | 26 | 23 | 25 | 27 | 25 | 29 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 27 | 26 | 23 |
Feels °C | 25 | 24 | 22 | 23 | 24 | 21 | 25 | 28 | 27 | 30 | 29 | 29 | 30 | 30 | 28 | 29 | 30 | 27 | 25 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | S 15 | S 15 | S 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | ESE 12 | ESE 12 | E 13 | E 14 |
2058 | 3610 | 4498 | 5865 | 6530 | 10162 | 10311 | 9888 | 6904 | 6150 | 5889 | 4041 | 3284 | 2824 | 2025 | 2064 | 2061 | 1277 | 1103 | 1314 | 1225 | |
Swell 2 Height (m) Direction Period (s) | SE 21 | E 14 | E 14 | E 14 | E 13 | E 13 | — | — | E 10 | E 10 | ENE 16 | ESE 10 | ENE 15 | SE 9 | ENE 14 | SE 9 | SE 9 | SW 16 | SW 16 | SW 16 | SW 16 |
358 | 98 | 94 | 93 | 87 | 87 | — | — | 709 | 530 | 51 | 1022 | 42 | 777 | 41 | 743 | 505 | 1630 | 1392 | 1552 | 1041 | |
Swell 3 Height (m) Direction Period (s) | E 14 | — | — | — | — | — | — | — | ENE 17 | ENE 16 | — | ENE 15 | — | ENE 15 | — | ENE 14 | ESE 12 | S 13 | S 13 | S 12 | S 12 |
98 | — | — | — | — | — | — | — | 27 | 25 | — | 45 | — | 42 | — | 40 | 193 | 225 | 345 | 99 | 71 | |
Wind waves Height (m) Direction Period (s) | NE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | — | — | — | — | ESE 10 | ESE 10 | — | ESE 10 | ESE 9 | ESE 9 | — | — | — | NE 4 | — | ENE 8 |
95 | 164 | 256 | 334 | 428 | — | — | — | — | 725 | 598 | — | 922 | 924 | 723 | — | — | — | 16 | — | 520 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 184 | 29 | 184 | 184 | 29 | 534 | 595 | 29 | 29 | 29 | 81 | 63 | 48 | 95 | 81 | 48 | 81 | 6 | 29 | 29 | 942 |
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
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.











